Everything about Robot Unicycle totally explained
The problem of creating a
robotic unicycle, a self-powered
unicycle that balances itself in three dimensions, is an interesting problem in
robotics and
control theory.
To first order, a robotic unicycle can be considered as a control problem similar to that of a two-dimensional
inverted pendulum with a
unicycle cart at its base: however, there are many higher-order effects involved in modelling the full system. Rotation of the drive wheel itself can provide control in only one dimension (ie. forwards and backwards): control in other dimensions generally requires other actuators, such as auxiliary pendulums,
reaction wheels, or
control moment gyroscopes attached to the main unicycle pendulum.
The theoretical work on the unicycle problem is complemented by work on the construction of actual mechanically ridden unicycles.
A number of vehicles are
almost robotic unicycles:
- The Segway is a vehicle which is capable of automatically balancing itself in the forwards-and-backwards direction, but has two parallel wheels rather than being capable of balancing from side to side.
In 2003, Bombardier announced a conceptual design for such a device used as a sport vehicle, the EMBRIO. It is unclear whether Bombardier ever intends to create a working prototype of this vehicle.
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