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Motion and force control of cooperative robotic manipulators with passive joints

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3 Author(s)
Tinós, R. ; Dept. of Electr. Eng., Univ. of Sao Paulo, Sao Carlos, Brazil ; Terra, M.H. ; Ishihara, J.Y.

In this paper, robotic systems when two or more underactuated manipulators are working in a cooperative way are studied. The underactuation effects on object to be controlled and on load capacity of the cooperative arms are analyzed. A hybrid control of motion and squeeze force is proposed. For the motion control, a Jacobian matrix that relates the torques in the actuated joints to the resulting force in the load is obtained. In addition, a method to compute the dynamic load-carrying capacity of cooperative manipulators with passive joints is presented. Results of the control system are verified in simulations and in an actual system formed by two cooperative arms.

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Control Systems Technology, IEEE Transactions on  (Volume:14 ,  Issue: 4 )