https://cstwiki.wtb.tue.nl/index.php?title=PRE2016_3_Groep19&feed=atom&action=historyPRE2016 3 Groep19 - Revision history2024-03-29T05:34:43ZRevision history for this page on the wikiMediaWiki 1.39.5https://cstwiki.wtb.tue.nl/index.php?title=PRE2016_3_Groep19&diff=39057&oldid=prevS157717: /* Maneuvering and targeting */2017-04-13T17:29:51Z<p><span dir="auto"><span class="autocomment">Maneuvering and targeting</span></span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>In order for the vehicle to move the space debris, it needs to reach this debris first. In order to do this, the spacecraft needs to use thrusters to alter the orbit parameters. In order to reach the same orbit as any piece of space debris, several parameters need to be altered: The lowest and highest point of the spacecraft orbit and the angle the spacecraft makes with the equator. Freeflyer can calculate what thrusters the spacecraft has to use to get to these parameters using the Target function. In the simulation, the spacecraft <del style="font-weight: bold; text-decoration: none;">will </del>target a chosen piece of space debris each time. This way, when the simulation is run, the spacecraft’s course will alter towards the course of a chosen debris particle.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>In order for the vehicle to move the space debris, it needs to reach this debris first. In order to do this, the spacecraft needs to use thrusters to alter the orbit parameters. In order to reach the same orbit as any piece of space debris, several parameters need to be altered: The lowest and highest point of the spacecraft orbit and the angle the spacecraft makes with the equator. Freeflyer can calculate what thrusters the spacecraft has to use to get to these parameters using the Target function. In the simulation, the spacecraft <ins style="font-weight: bold; text-decoration: none;">can </ins>target a chosen piece of space debris each time. This way, when the simulation is run, the spacecraft’s course will alter towards the course of a chosen debris particle<ins style="font-weight: bold; text-decoration: none;">. This, however, can result in a burn which takes a long time and jumps right to the moment when the burn ends. This can result in the spacecraft jumping from one side of the Earth to the other. Because of this we make a loop which is very similar, except for one thing: instead of changing the length of the burn it repeats a very short burn until the target requirements are fulfilled. This results in a system where we have the same level of control while still having the possibility of taking separate actions in between</ins>.</div></td></tr>
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</table>S157717https://cstwiki.wtb.tue.nl/index.php?title=PRE2016_3_Groep19&diff=39050&oldid=prevS157717: /* Simulation */2017-04-13T16:50:42Z<p><span dir="auto"><span class="autocomment">Simulation</span></span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture4.PNG|600px|The Freeflyer targeting menu]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture4.PNG|600px|The Freeflyer targeting menu]]</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">===Our Model===</ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">In our model the spacecraft changes its orbit in order to match that of a set number of targets. Firstly it changes its inclination close to the initial ascending node or descending node, which is are locations where the orbital plane of the debris intersects that of the satellite. The direction of the burn depends on the velocity vector of the target, since from this vector we can deduce if it's the ascending or descending node.</ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">After the inclination change the apogee gets raised by burning prograde when the spacecraft approaches the perigee. We do this until the apogee approaches that of the target. The apogee of the spacecraft is a tiny bit lower, so when we have matched the perigee we have an orbit such that just by waiting we catch up to the target.</ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">After the target orbit has been achieved we stay in this orbit for a set amount of time before repeating this procedure for the other targets.</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td></tr>
</table>S157717https://cstwiki.wtb.tue.nl/index.php?title=PRE2016_3_Groep19&diff=39044&oldid=prevS157189: /* What is done with the FreeFlyer simulation? */2017-04-13T15:58:07Z<p><span dir="auto"><span class="autocomment">What is done with the FreeFlyer simulation?</span></span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The properties of the orbit of the spacecraft can be changed instantly without the use of any propulsion; however, this would not be an accurate simulation of the spacecraft’s performance. Therefore, all maneuvers are done using Freeflyer’s maneuver function, which uses the rockets and fuel of the spacecraft. The orbit is changed with use of low-thrust-many-revolution</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The properties of the orbit of the spacecraft can be changed instantly without the use of any propulsion; however, this would not be an accurate simulation of the spacecraft’s performance. Therefore, all maneuvers are done using Freeflyer’s maneuver function, which uses the rockets and fuel of the spacecraft. The orbit is changed with use of low-thrust-many-revolution</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Modelling space debris===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Modelling space debris===</div></td></tr>
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</table>S157189https://cstwiki.wtb.tue.nl/index.php?title=PRE2016_3_Groep19&diff=38978&oldid=prevS157189: /* Modeling Spacecraft */2017-04-13T14:48:37Z<p><span dir="auto"><span class="autocomment">Modeling Spacecraft</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:48, 13 April 2017</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture1.PNG|<del style="font-weight: bold; text-decoration: none;">200px]</del>|Original orbital properties of a spacecraft]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture1.PNG|<ins style="font-weight: bold; text-decoration: none;">600px</ins>|Original orbital properties of a spacecraft]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the manoeuvrability of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful ion thrusters. One of these is in the front centre of the vehicle and will be used for moving around debris. The first one is in the back and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the manoeuvrability of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful ion thrusters. One of these is in the front centre of the vehicle and will be used for moving around debris. The first one is in the back and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td></tr>
</table>S157189https://cstwiki.wtb.tue.nl/index.php?title=PRE2016_3_Groep19&diff=38977&oldid=prevS157189: /* Modeling Spacecraft */2017-04-13T14:48:07Z<p><span dir="auto"><span class="autocomment">Modeling Spacecraft</span></span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture1.PNG|<del style="font-weight: bold; text-decoration: none;">400px</del>]|Original orbital properties of a spacecraft]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture1.PNG|<ins style="font-weight: bold; text-decoration: none;">200px</ins>]|Original orbital properties of a spacecraft]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the manoeuvrability of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful ion thrusters. One of these is in the front centre of the vehicle and will be used for moving around debris. The first one is in the back and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the manoeuvrability of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful ion thrusters. One of these is in the front centre of the vehicle and will be used for moving around debris. The first one is in the back and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td></tr>
</table>S157189https://cstwiki.wtb.tue.nl/index.php?title=PRE2016_3_Groep19&diff=38975&oldid=prevS157189: /* Modeling Spacecraft */2017-04-13T14:47:47Z<p><span dir="auto"><span class="autocomment">Modeling Spacecraft</span></span></p>
<table style="background-color: #fff; color: #202122;" data-mw="interface">
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<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:47, 13 April 2017</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l439">Line 439:</td>
<td colspan="2" class="diff-lineno">Line 439:</td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture1.PNG|<del style="font-weight: bold; text-decoration: none;">600px</del>]|Original orbital properties of a spacecraft]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture1.PNG|<ins style="font-weight: bold; text-decoration: none;">400px</ins>]|Original orbital properties of a spacecraft]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the manoeuvrability of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful ion thrusters. One of these is in the front centre of the vehicle and will be used for moving around debris. The first one is in the back and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the manoeuvrability of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful ion thrusters. One of these is in the front centre of the vehicle and will be used for moving around debris. The first one is in the back and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td></tr>
</table>S157189https://cstwiki.wtb.tue.nl/index.php?title=PRE2016_3_Groep19&diff=38974&oldid=prevS157189: /* Modeling Spacecraft */2017-04-13T14:47:30Z<p><span dir="auto"><span class="autocomment">Modeling Spacecraft</span></span></p>
<table style="background-color: #fff; color: #202122;" data-mw="interface">
<col class="diff-marker" />
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<col class="diff-marker" />
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<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:47, 13 April 2017</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l439">Line 439:</td>
<td colspan="2" class="diff-lineno">Line 439:</td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture1.PNG|600px]|Original orbital properties of a spacecraft]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture1.PNG|600px]|Original orbital properties of a spacecraft<ins style="font-weight: bold; text-decoration: none;">]</ins>]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the manoeuvrability of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful ion thrusters. One of these is in the front centre of the vehicle and will be used for moving around debris. The first one is in the back and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the manoeuvrability of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful ion thrusters. One of these is in the front centre of the vehicle and will be used for moving around debris. The first one is in the back and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td></tr>
</table>S157189https://cstwiki.wtb.tue.nl/index.php?title=PRE2016_3_Groep19&diff=38973&oldid=prevS157189: /* Simulation */2017-04-13T14:47:09Z<p><span dir="auto"><span class="autocomment">Simulation</span></span></p>
<table style="background-color: #fff; color: #202122;" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:47, 13 April 2017</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l432">Line 432:</td>
<td colspan="2" class="diff-lineno">Line 432:</td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>As stated before, in order for the model to be accurate, it must be able to take into account actual space debris. In order to do this, a NASA Database containing information about large quantities of debris can be used. This database stores the data of space debris moving around the earth in lower orbit in the form of a .tle file. This database was found on the website of www.space-track.org, and contains all information regarding the orbit of each object. This means that these objects still need to be given a size, and their own weight, which is done inside Freeflyer. In the code below these properties are determined. In the loop starting on line 41 for instance, LEO space debris is given a movement step size, and weight, one piece of space debris for every time the loop is run. The weight is determined more specifically in line 45 and alters between particles with weights up to 5 kg.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>As stated before, in order for the model to be accurate, it must be able to take into account actual space debris. In order to do this, a NASA Database containing information about large quantities of debris can be used. This database stores the data of space debris moving around the earth in lower orbit in the form of a .tle file. This database was found on the website of www.space-track.org, and contains all information regarding the orbit of each object. This means that these objects still need to be given a size, and their own weight, which is done inside Freeflyer. In the code below these properties are determined. In the loop starting on line 41 for instance, LEO space debris is given a movement step size, and weight, one piece of space debris for every time the loop is run. The weight is determined more specifically in line 45 and alters between particles with weights up to 5 kg.</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture5.PNG|<del style="font-weight: bold; text-decoration: none;">300px</del>|Space debris modeling code in Freeflyer]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture5.PNG|<ins style="font-weight: bold; text-decoration: none;">600px</ins>|Space debris modeling code in Freeflyer]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Modeling Spacecraft===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Modeling Spacecraft===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture1.PNG|<del style="font-weight: bold; text-decoration: none;">300px</del>]|Original orbital properties of a spacecraft]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture1.PNG|<ins style="font-weight: bold; text-decoration: none;">600px</ins>]|Original orbital properties of a spacecraft]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the manoeuvrability of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful ion thrusters. One of these is in the front centre of the vehicle and will be used for moving around debris. The first one is in the back and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the manoeuvrability of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful ion thrusters. One of these is in the front centre of the vehicle and will be used for moving around debris. The first one is in the back and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture2.PNG|<del style="font-weight: bold; text-decoration: none;">300px</del>|Thruster properties in Freeflyer]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture2.PNG|<ins style="font-weight: bold; text-decoration: none;">600px</ins>|Thruster properties in Freeflyer]]</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Maneuvering and targeting===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Maneuvering and targeting===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>In order for the vehicle to move the space debris, it needs to reach this debris first. In order to do this, the spacecraft needs to use thrusters to alter the orbit parameters. In order to reach the same orbit as any piece of space debris, several parameters need to be altered: The lowest and highest point of the spacecraft orbit and the angle the spacecraft makes with the equator. Freeflyer can calculate what thrusters the spacecraft has to use to get to these parameters using the Target function. In the simulation, the spacecraft will target a chosen piece of space debris each time. This way, when the simulation is run, the spacecraft’s course will alter towards the course of a chosen debris particle.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>In order for the vehicle to move the space debris, it needs to reach this debris first. In order to do this, the spacecraft needs to use thrusters to alter the orbit parameters. In order to reach the same orbit as any piece of space debris, several parameters need to be altered: The lowest and highest point of the spacecraft orbit and the angle the spacecraft makes with the equator. Freeflyer can calculate what thrusters the spacecraft has to use to get to these parameters using the Target function. In the simulation, the spacecraft will target a chosen piece of space debris each time. This way, when the simulation is run, the spacecraft’s course will alter towards the course of a chosen debris particle.</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture4|<del style="font-weight: bold; text-decoration: none;">300px</del>|The Freeflyer targeting menu]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture4<ins style="font-weight: bold; text-decoration: none;">.PNG</ins>|<ins style="font-weight: bold; text-decoration: none;">600px</ins>|The Freeflyer targeting menu]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td></tr>
</table>S157189https://cstwiki.wtb.tue.nl/index.php?title=PRE2016_3_Groep19&diff=38967&oldid=prevS157189: /* Simulation */2017-04-13T14:44:42Z<p><span dir="auto"><span class="autocomment">Simulation</span></span></p>
<table style="background-color: #fff; color: #202122;" data-mw="interface">
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:44, 13 April 2017</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Modelling space debris===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Modelling space debris===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>As stated before, in order for the model to be accurate, it must be able to take into account actual space debris. In order to do this, a NASA Database containing information about large quantities of debris can be used. This database stores the data of space debris moving around the earth in lower orbit in the form of a .tle file. This database was found on the website of www.space-track.org, and contains all information regarding the orbit of each object. This means that these objects still need to be given a size, and their own weight, which is done inside Freeflyer. In the code below these properties are determined. In the loop starting on line 41 for instance, LEO space debris is given a movement step size, and weight, one piece of space debris for every time the loop is run. The weight is determined more specifically in line 45<del style="font-weight: bold; text-decoration: none;">, </del>and alters between particles with weights up to 5 kg.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>As stated before, in order for the model to be accurate, it must be able to take into account actual space debris. In order to do this, a NASA Database containing information about large quantities of debris can be used. This database stores the data of space debris moving around the earth in lower orbit in the form of a .tle file. This database was found on the website of www.space-track.org, and contains all information regarding the orbit of each object. This means that these objects still need to be given a size, and their own weight, which is done inside Freeflyer. In the code below these properties are determined. In the loop starting on line 41 for instance, LEO space debris is given a movement step size, and weight, one piece of space debris for every time the loop is run. The weight is determined more specifically in line 45 and alters between particles with weights up to 5 kg.</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture5.PNG]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture5.PNG<ins style="font-weight: bold; text-decoration: none;">|300px|Space debris modeling code in Freeflyer</ins>]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Modeling Spacecraft===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Modeling Spacecraft===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture1.PNG]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture1.PNG<ins style="font-weight: bold; text-decoration: none;">|300px</ins>]<ins style="font-weight: bold; text-decoration: none;">|Original orbital properties of a spacecraft</ins>]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the manoeuvrability of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful ion thrusters. One of these is in the front centre of the vehicle and will be used for moving around debris. The first one is in the back and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the manoeuvrability of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful ion thrusters. One of these is in the front centre of the vehicle and will be used for moving around debris. The first one is in the back and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture2.PNG]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture2.PNG<ins style="font-weight: bold; text-decoration: none;">|300px|Thruster properties in Freeflyer</ins>]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Maneuvering and targeting===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Maneuvering and targeting===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>In order for the vehicle to move the space debris, it needs to reach this debris first. In order to do this, the spacecraft needs to use thrusters to alter the orbit parameters. In order to reach the same orbit as any piece of space debris, several parameters need to be altered: The lowest and highest point of the spacecraft orbit and the angle the spacecraft makes with the equator. Freeflyer can calculate what thrusters the spacecraft has to use to get to these parameters using the Target function. In the simulation, the spacecraft will target a chosen piece of space debris each time. This way, when the simulation is run, the spacecraft’s course will alter towards the course of a chosen debris particle.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>In order for the vehicle to move the space debris, it needs to reach this debris first. In order to do this, the spacecraft needs to use thrusters to alter the orbit parameters. In order to reach the same orbit as any piece of space debris, several parameters need to be altered: The lowest and highest point of the spacecraft orbit and the angle the spacecraft makes with the equator. Freeflyer can calculate what thrusters the spacecraft has to use to get to these parameters using the Target function. In the simulation, the spacecraft will target a chosen piece of space debris each time. This way, when the simulation is run, the spacecraft’s course will alter towards the course of a chosen debris particle.</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture4]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Capture4<ins style="font-weight: bold; text-decoration: none;">|300px|The Freeflyer targeting menu</ins>]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td></tr>
</table>S157189https://cstwiki.wtb.tue.nl/index.php?title=PRE2016_3_Groep19&diff=38954&oldid=prevS157189: /* Simulation */2017-04-13T14:40:25Z<p><span dir="auto"><span class="autocomment">Simulation</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:40, 13 April 2017</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>As stated before, in order for the model to be accurate, it must be able to take into account actual space debris. In order to do this, a NASA Database containing information about large quantities of debris can be used. This database stores the data of space debris moving around the earth in lower orbit in the form of a .tle file. This database was found on the website of www.space-track.org, and contains all information regarding the orbit of each object. This means that these objects still need to be given a size, and their own weight, which is done inside Freeflyer. In the code below these properties are determined. In the loop starting on line 41 for instance, LEO space debris is given a movement step size, and weight, one piece of space debris for every time the loop is run. The weight is determined more specifically in line 45, and alters between particles with weights up to 5 kg.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>As stated before, in order for the model to be accurate, it must be able to take into account actual space debris. In order to do this, a NASA Database containing information about large quantities of debris can be used. This database stores the data of space debris moving around the earth in lower orbit in the form of a .tle file. This database was found on the website of www.space-track.org, and contains all information regarding the orbit of each object. This means that these objects still need to be given a size, and their own weight, which is done inside Freeflyer. In the code below these properties are determined. In the loop starting on line 41 for instance, LEO space debris is given a movement step size, and weight, one piece of space debris for every time the loop is run. The weight is determined more specifically in line 45, and alters between particles with weights up to 5 kg.</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[File:Capture5.PNG]]</ins></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Modeling Spacecraft===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Modeling Spacecraft===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To increase the realism of the model itself, the spacecraft needs to be properly modelled as well. Freeflyer has a system that allows the introduction of new spacecraft using several menus. First of all, the original course of the spacecraft needs to be determined:</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[File:Capture1.PNG]]</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the <del style="font-weight: bold; text-decoration: none;">maneuverability </del>of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful <del style="font-weight: bold; text-decoration: none;"> </del>ion thrusters. One of these is in the front <del style="font-weight: bold; text-decoration: none;">center </del>of the vehicle<del style="font-weight: bold; text-decoration: none;">, </del>and will be used for moving around debris. <del style="font-weight: bold; text-decoration: none;">One </del>is in the back<del style="font-weight: bold; text-decoration: none;">, </del>and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>By only entering a preferred height, the spacecraft will automatically presume a path around the earth equator. The program then allows for the addition of several spacecraft components. The components that matter for the existing project are fuel sources and thrusters. For modelling these thrusters, there is once again a menu. The part of this menu shown here allows for changing the direction in which the output force of the thruster is applied. The total system of thrusters has a heavy impact on the <ins style="font-weight: bold; text-decoration: none;">manoeuvrability </ins>of the spacecraft. The spacecraft in the simulation is equipped with 6 equally powerful ion thrusters. One of these is in the front <ins style="font-weight: bold; text-decoration: none;">centre </ins>of the vehicle and will be used for moving around debris. <ins style="font-weight: bold; text-decoration: none;">The first one </ins>is in the back and will be the primary source for acceleration. The other four thrusters have been placed around the sides of the vehicle, pointed partially backwards, so they can be used both for changing the speed of the vehicle as well as the inclination and the position and direction compared to the earth’s surface.</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[File:Capture2.PNG]]</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Maneuvering and targeting===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Maneuvering and targeting===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>In order for the vehicle to move the space debris, it needs to reach this debris first. In order to do this, the spacecraft needs to use thrusters to alter the <del style="font-weight: bold; text-decoration: none;"> </del>orbit parameters. In order to reach the same orbit as any piece of space debris, several parameters need to be altered: The lowest and highest point of the spacecraft orbit<del style="font-weight: bold; text-decoration: none;">, </del>and the angle the spacecraft makes with the equator. Freeflyer can calculate what thrusters the spacecraft has to use to get to these parameters using the Target function. In the simulation, the spacecraft will target a chosen piece of space debris each time. This way, when the simulation is run, the spacecraft’s course will alter <del style="font-weight: bold; text-decoration: none;">to </del>the course of a chosen debris particle.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>In order for the vehicle to move the space debris, it needs to reach this debris first. In order to do this, the spacecraft needs to use thrusters to alter the orbit parameters. In order to reach the same orbit as any piece of space debris, several parameters need to be altered: The lowest and highest point of the spacecraft orbit and the angle the spacecraft makes with the equator. Freeflyer can calculate what thrusters the spacecraft has to use to get to these parameters using the Target function. In the simulation, the spacecraft will target a chosen piece of space debris each time. This way, when the simulation is run, the spacecraft’s course will alter <ins style="font-weight: bold; text-decoration: none;">towards </ins>the course of a chosen debris particle.</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[File:Capture4]]</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td></tr>
</table>S157189