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Coordinated control of multiple manipulator systems

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1 Author(s)
Ping Hsu ; Dept. of Electr. Eng., San Jose State Univ., CA, USA

A scheme for controlling multimanipulator systems is presented. The control objective is to coordinate the manipulators to perform parts-matching tasks such as screwing a nut onto a bolt. The task of moving a rigid object can be treated as a special case. Two secondary control objectives, internal force control and load distribution, can be accomplished within the structure of the control law. The internal force control mechanism keeps the internal forces on the object being manipulated at a desirable level. The load distribution mechanism distributes control effort to each manipulator according to a weighting factor. It is also shown that the control algorithm has a modular structure which facilitates its implementation on a multiprocessor computer. The scheme was tested on a planar scara type dual-manipulator system. A series of experimental results is included to demonstrate the system performance under various conditions

Published in:

IEEE Transactions on Robotics and Automation  (Volume:9 ,  Issue: 4 )