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Synthesizing any specified elastic behavior with a hybrid connection of simple compliant components

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2 Author(s)
Roberts, R.G. ; Dept. of Electr. & Comput. Eng., Florida State Univ., Tallahassee, FL, USA ; Shirey, T.A.

Achieving adequate force control is an important problem in the application of robotics technology to manufacturing tasks. One approach to this problem is the use of passive compliance. A number of methods have been proposed for designing a passive compliance mechanism with a prescribed spatial stiffness or compliance matrix using a parallel or serial connection of elastic devices. If the spatial stiffness or compliance matrix is isotropic, the constituent elastic devices are simple in the sense that they are strictly translational or rotational. Non-isotropic stiffness and compliance matrices require the use of elastic screw devices that couple translation and rotation. These screw devices are of a more complicated nature than the simple elastic devices that are sufficient for the isotropic case. In this article the authors demonstrate how these screw devices can be eliminated by using a hybrid connection of parallel and serial configurations consisting of only simple elastic devices. This method can be used to achieve any prescribed non-isotropic stiffness or compliance matrix.

Published in:

Intelligent Robots and Systems, 2003. (IROS 2003). Proceedings. 2003 IEEE/RSJ International Conference on  (Volume:4 )

Date of Conference:

27-31 Oct. 2003