Autonomous mobility scooter requirements

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in order to make a product or a model of the system, it must first be decided what the actual requirements and limitations of our model are. with these requirements we can see what our model should eventually do.

we have split the requirements in four different sections, to split main concerns of the system.

navigation: these requirements concern everything to with the software and navigation, what it should, can, cannot or should not do.
safety: these requirements concern safety issues of a mobility scooter.
smart mobility: these requirements concern how to enhance the mobility scooter such that it responds to the requests of the user.
physical: these requirements concern the actual hardware that is needed for the mobility scooter.

navigation

- the mobility scooter can navigate through a shop
- the mobility scooter can use elevators
- the mobility scooter can use public transport
- the mobility scooter can alter its path in case of obstructions.
- the mobility scooter can offer alternative paths to the destination
- the mobility scooter can navigate itself when it is dark outside
- the mobility scooter can navigate through rain
- the mobility scooter can navigate through fog
- the mobility scooter can drive through snow less than 5 cm deep

safety

- The mobility scooter can not drive faster then 6 km/h on a walking path
- the mobility scooter should not get closer than 10 centimetres to another person while driving.
- if the autonomous system detects a failure, it notifies the user
- The mobility scooter can detect change in height in the road ahead (curbs, speedbumps, holes, ramps)
- The mobility scooter can detect a berm
- The mobility scooter can detect Bushes
- The mobility scooter can detect Cyclists
- The mobility scooter can detect pedestrians
- The mobility scooter can detect animals
- The mobility scooter can detect motorised vehicles
- Look past a speed bump when driving up (Scooter will be tilted upwards)
- Will not tilt and fall when making a turn
- Driver will not fall out of the scooter when making a tight turn
- Driver will not fall out of the scooter because of fast steering movements
- Be hard to miss for other road users
- Not distract other road users to much, resulting in a crash
- Driver can intervene when they don’t trust the scooter
- Does not endanger the driver when a failure occurs
- Clear indication when scooter can’t see anything (Also UI related)
- Safely move to a safe spot when battery nearly drained
- Can safely operate with a driver of 125kg
- Scooter stops when the driver falls out
- Changes of injuries minimized when falling in the direct surroundings of a stationary scooter (for example: no sharp edges)
- Minimize change of falling when getting off and on the scooter
- Can detect when something is blocking a wheel
- Can override the driver input when collision is imminent (Not unusual that the applies the accelerator when trying to brake. Another example is that the driver wants to go forward but the scooter is in reverse)
- Will not tilt and fall when driving on a sloping surface
- Driver will not fall out of the scooter when driving on a sloping surface

smart mobility

- The mobility scooter has a display.
- The mobility scooter has on or more speakers.
- The scooter allows the user to set their destination using the display.
- The scooter allows the user to set their destination using voice commands.
- The scooter allows the user to alter communicative and other settings, such as favorite destinations.
- The scooter allows a user to get in using up to x seconds. time to be edited after more research
- The scooter provides auditory feedback to the user.
- The scooter provides visual feedback to the user.
- The scooter is able to 'warn' surrounding persons when needed.
- The scooter is controllable through the steering wheel, a joystick or voice commands.
- The scooter is able to connect to other devices, like the user's smartphone.
- The scooter maintains a connection to the internet.
- The scooter is able to make calls and send texts upon user command.
- The scooter is able to self-initiate a call in case of an emergency.
- The scooter is able to communicate with other scooters to gather and share sensory information in their environment.
- The scooter has a hardware kill-switch, to ensure the user can act in case of malfunctions.

physical

- the mobility scooter should fit IR sensors
- the mobility scooter should fit ultrasonic sensors
- the mobility scooter should fit a LIDAR system
- the mobility scooter should have batteries that can last 3 hours of driving time
- the mobility scooter should have a computer system built in such that it can process the massive amount of data
- the mobility scooter should fit a 4g antenna
- The autonomous mobility soocter will have flashing lights.
- The autonomous mobility scooter will have whit front lights.
- The autonomouw mobility soocter will have red back light.

legal requirements

- The mobility scooter will not drive faster than 6km/h on a side walk
- The mobility scooter will not drive faster than the speed limit when on a bicycle path
- The mobility scooter will not drive faster than 30 km/h on a bicycle path inside the built-up area.
- The mobility scooter will not drive faster than 40 km/h on a bicycle path outside the built-up area.
- The mobility scooter will not drive faster than 45 km/h on a regular road.
- The mobility scooter will not drive faster than the speed limit when on a regular road.
- When driving on a bicycle path the autonomous mobility scooter will not drive next to an other mobility scooter.
- When driving on a regular road the autonomous mobility scooter will not drive next to an other mobility scooter.
- When driving on a sideway the mobility scooter will obey the right of way rules for pedestrians.
- When driving on a bicycle path the mobility scooter will follow the right of way rules for mopeds.
- When driging on a regular road the mobility scooter will follow the right of way rules for mopeds.
- The mobility scooter will use flashing lights when changing driving directions.
- The mobility scooter will have his light on between 30 minutes before sunset and 30 minutes after sunrise when it is being used.
- The mobility scooter will ahve its light on during bad weather when it is used.