Static Stiffness Analysis and Simulation of 6-PTRT Parallel Robot

De Long Leng; Dong Sheng Qu; Yan Wu Liu

doi:10.4028/www.scientific.net/AMM.318.33

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 318Static Stiffness Analysis and Simulation of 6-PTRT...

Static Stiffness Analysis and Simulation of 6-PTRT Parallel Robot

Abstract:

To reveal the static stiffness behavior of a 6-PTRT parallel robot and find out its change rule in order to provide the reasonable parameters for the structural design, the stiffness characteristics of this parallel mechanism was studied. Based on the influence coefficient method, a static stiffness model for 6-PTRT parallel robot was established. The proposed model considered not only the axis stiffness of actuator but also the stiffness of passive joints, and the change of Jacobian matrix and first-order influence coefficient brought about by tiny change of the parallel robot mechanism's configuration under external wrench. The static stiffness matrix of parallel robot in initial position and its stiffness distribution rules for a certain workspace were given by numerical calculation and finite element method, which comparatively verify the exactness of stiffness model.

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Periodical:

Applied Mechanics and Materials (Volume 318)

Pages:

33-38

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.318.33

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Online since:

May 2013

Authors:

De Long Leng, Dong Sheng Qu, Yan Wu Liu

Keywords:

6-PTRT Parallel Robot, Influence Coefficient, Jacobian Matrix, Static Stiffness

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