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The Robots



Underwater Helicopter Robot



This is a new one and will be challenging to control. It's sitting on a stand here. It has 4 servos which drive a pair of fins. Each fin can vary its angle of attack and can reciprocatingly sweep through an angle up to +/- 90 degrees. By suitable control of the 4 servos it should be possible to produce 5 degrees of freedom (from 4 servos!). You can do interesting real life simulations of this robot yourself in a swimming pool. Simply take a deep breath lift your legs off the bottom of the pool and put your arms out straight sideways. Then see what degree of control you can get by sweeping your arms back and forth and at the same time playing with the angle of attack of your hands. This robot is interesting in posing interesting problems in the static control of a submersible. Future work will concern itself with fitting a tail with rudder and elevators so it can "fly". This robot is a different way to investigate insect flight without the power-to-weight problems of building an airborne robot.