Robonaut Hand Subsystem
Subsystems Hand
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Hand
Robonaut Hand will be able to fit into all the required places. Joint travel for the wrist pitch and yaw is designed to meet or exceed the human hand in a pressurized glove. The hand and wrist parts are sized to reproduce the necessary strength to meet maximum EVA crew requirements.
The Robonaut Hand has a total of fourteen degrees of freedom. It consists of a forearm which houses the motors and drive electronics, a two degree of freedom wrist, and a five finger, twelve degree of freedom hand. The forearm, which measures four inches in diameter at its base and is approximately eight inches long, houses all fourteen motors, 12 separate circuit boards, and all of the wiring for the hand. d The hand itself is broken down into two sections : a dexterous work set which is used for manipulation, and a grasping set which allows the hand to maintain a stable grasp while manipulating or actuating a given object. This is an essential feature for tool use. The dexterous set consists of two three degree of freedom fingers (pointer and index) and a three degree of freedom opposable thumb. The grasping set consists of two, one degree of freedom fingers (ring and pinkie) and a palm degree of freedom. All of the fingers are shock mounted into the palm.
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