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An efficient solution of a differential inverse kinematics problem for wrist-partitioned robots

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2 Author(s)
Wu, C.-H. ; Dept. of Electr. Eng. & Comput. Sci., Northwestern Univ., Evanston, IL, USA ; Kuu-Young Young

An efficient approach is presented for solving the inverse Jacobian problem for wrist-partitioned robots; specifically, the differential inverse kinematics problems. By selecting the wrist coordinate frame as the reference coordinate frame, a simplified Jacobian relation can be obtained for deriving a set of orthogonal bases for the screw system. From these orthogonal screws, the instantaneous Cartesian motion can be separated into translational and rotational parts for solving the differential joint variable rates. As a result, a set of concise, closed-form equations for solving the above inverse problem can be easily generated. For illustration, the PUMA 560 robot is selected as an example. On the basis of the simplified equations, the exact form of the inverse Jacobian matrix can also be obtained

Published in:

Robotics and Automation, IEEE Transactions on  (Volume:6 ,  Issue: 1 )

Date of Publication:

Feb 1990

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