2005•Machine Tool & HydraulicsRequires access

The Analysis of the 3-PSS Mechanism Kinematics Characteristics Based on the Screw Theory

Wuyi Chen

Abstract

3-PSS mechanism was analyzed based on the screw theory.First one offset of the mechanism was split into two serial mechanism,and two screw kinematic equations were given.Second the kinematic constraint was found according to configuration.At last a constraint from three linearly independent anti-screw moments was shown to act on the moveable platform of the 3-PSS mechanism,which then could move only in three-translation direction.The conclusion can simplifier the analysis of 3-PSS other characteristics,and the method has some reference for other deficient dof mechanism.

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Key concepts: Screw theory, Kinematics, Mechanism (biology), Offset (computer science), Constraint (computer-aided design), Translation (biology), Control theory (sociology), Mathematics