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The (true) Stewart platform has 12 configurations

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2 Author(s)
Lazard, D. ; LITP, Inst. Blaise Pascal, Paris, France ; Merlet, J.-P.

We consider a Stewart platform and show that its forward kinematics has at most 12 solutions. A first geometrical demonstration is provided which uses the concept of circularity and in a second proof we show that this problem is equivalent to find a system of two planar parallel manipulators with each 6 solutions to the forward kinematic problem. A geometrical construction is provided to construct such a system and a Stewart platform with 12 configurations is exhibited

Published in:

Robotics and Automation, 1994. Proceedings., 1994 IEEE International Conference on

Date of Conference:

8-13 May 1994