Stiffness Analysis Of Multi-Chain Parallel Robotic Systems

Anatol Pashkevich (1) , Damien Chablat (1) , Philippe Wenger (1)

1 IRCCyN - Institut de Recherche en Communications et en Cybernétique de Nantes

The paper presents a new stiffness modelling method for multi-chain parallel robotic manipulators with flexible links and compliant actuating joints. In contrast to other works, the method involves a FEA-based link stiffness evaluation and employs a new solution strategy of the kinetostatic equations, which allows computing the stiffness matrix for singular postures and to take into account influence of the internal forces. The advantages of the developed technique are confirmed by application examples, which deal with stiffness analysis of the Orthoglide manipulator.

Mots clés: Parallel robotic manipulators; stiffness analysis; kinetostatic modelling; Orthoglide robot

Domaines: Robotique [cs.RO]; Génie mécanique [physics.class-ph]; Génie mécanique [physics.class-ph]

Anatol Pashkevich, Damien Chablat, Philippe Wenger. Stiffness Analysis Of Multi-Chain Parallel Robotic Systems. 9th IFAC Workshop on Intelligent Manufacturing Systems, Oct 2008, France. pp.1-6. ⟨hal-00326672⟩