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Optimal selection of manipulator impedance for contact tasks

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3 Author(s)
DiMaio, S.P. ; Dept. of Electr. & Comput. Eng., British Columbia Univ., Vancouver, BC, Canada ; Hashtrudi-Zaad, K. ; Salcudean, S.E.

This paper addresses position and force control of robotic manipulators that are in contact with environments that exhibit mechanical impedances covering a large continuous range, from very soft to very stiff. For robot programming, automation, teleoperation and haptics, such environments enforce a trade-off between position and force control, which can be accommodated by impedance controllers. In this work, we extend the concept of duality and consider impedance matching in order to optimise a combined position and force trajectory error metric. The analysis of numerical optimisation results provides clear guidance on the choice of target impedance parameters, based on environment and manipulator dynamics.

Published in:

Robotics and Automation, 2004. Proceedings. ICRA '04. 2004 IEEE International Conference on  (Volume:5 )

Date of Conference:

26 April-1 May 2004