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Modeling of large-deflection links for compliant
mechanisms |
| Zhonglei FENG,Yueqing YU,Wenjing WANG, |
| College of Mechanical
Engineering and Applied Electronics Technology, Beijing University
of Technology, Beijing 100124, China; |
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Abstract The traditional pseudo-rigid-body model (PRBM) has one degree of freedom (DOF) and performs a good simulation to the tip locus of flexible links for compliant mechanisms on the basis of a parametric approximation method. In this study, a new approach of a two-DOF PRBM is proposed to simulate both the tip locus and tip deflection angle of large-deflection links for compliant mechanisms on the basis of the angular deflection approximation technique. A linear regression for the spring stiffness coefficient of the 2R PRBM using the optimization technique is presented. The advantage of the new model is well illustrated through a numerical comparison between the 1R and the 2R PRBM.
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| Keywords
compliant mechanism
pseudo-rigid-body model (PRBM)
large-deflection link
angular deflection approximation
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Issue Date: 05 September 2010
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