Computer Science – Robotics
Scientific paper
2009-09-08
42\`eme CIRP Conference on Manufacturing Systems, Grenoble : France (2009)
Computer Science
Robotics
Scientific paper
The paper focuses on the accuracy improvement of stiffness models for parallel manipulators, which are employed in high-speed precision machining. It is based on the integrated methodology that combines analytical and numerical techniques and deals with multidimensional lumped-parameter models of the links. The latter replace the link flexibility by localized 6-dof virtual springs describing both translational/rotational compliance and the coupling between them. There is presented detailed accuracy analysis of the stiffness identification procedures employed in the commercial CAD systems (including statistical analysis of round-off errors, evaluating the confidence intervals for stiffness matrices). The efficiency of the developed technique is confirmed by application examples, which deal with stiffness analysis of translational parallel manipulators.
Chablat Damien
Klimchik Alexandr
Pashkevich Anatoly
Wenger Philippe
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