3P1-H06 非伸縮分岐腱をもつ2関節ロボットフィンガの開発(筋骨格モデリング)

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  • 3P1-H06 Development of the two degrees of freedom robotic finger with nonstretch branching tendon(Musculoskeletal modeling)

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The most important goal for developing robotic hands is realizing stability of the grasping and dexterous manipulation with a simple control law. To achieve them, we focus on a branching tendon mechanism in a human finger. Links connected with a nonstretch branching tendon are coupled by a geometric restriction. The coupling disappears when one of branching tendon slacks. By utilizing these features, the hand may be able to grasp with a simple control and manipulate the grasped object. We developed the robotic finger with two degrees of freedom and two tendons. We proposed a joint angular position control for this finger. We derived the condition for a branching tendon to slack, and validated it by an experiment. Experimental results demonstrated that the hand can be position-controlled when it moved freely, and that the coordination between joints changed when the condition is satisfied.

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