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Simulation of cooperating robot manipulators on a mobile platform

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3 Author(s)
Murphy, S.H. ; Center for Intelligent Robotics Syst. for Space Exploration, Rensselaer Polytech. Inst., Troy, NY, USA ; Ting-Yung Wen, J. ; Saridis, G.N.

The dynamic equations of motion are presented for two or more cooperating manipulators on a freely moving mobile platform. The system of cooperating robot manipulators forms a closed kinematic chain where the force of interaction must be included in the formulation of robot and platform dynamics. The formulation includes the full dynamic interactions from arms to platform and arm tip to arm tip, and the possible translation and rotation of the platform. The equations of motion are shown to be identical in structure to the fixed-platform cooperative manipulator dynamics. The structure of the closed-chain dynamics, allows the use of any solution for the open topological tree of base and manipulator links. The number of degrees of freedom (DOF) of the system is sufficiently large to make recursive dynamic calculation methods potentially more efficient than closed-form solutions. A complete simulation with two 6-DOF manipulators of a free-floating platform is presented along a with a multiple-arm controller to position the common load

Published in:

Robotics and Automation, IEEE Transactions on  (Volume:7 ,  Issue: 4 )