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2007, Volume 2, Issue 2

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Frontiers of Mechanical Engineering >> 2007, Volume 2, Issue 2 doi: 10.1007/s11465-007-0037-3

Reliability analysis of kinematic accuracy for the elastic slider-crank mechanism

1.Department of Electronic and Mechanical Engineering, Xidian University, Xi′an 710071, China; Department of Physics and Electrical Engineering, Yulin College, Yulin 719000, China; 2.Department of Electronic and Mechanical Engineering, Xidian University, Xi′an 710071, China

Available online: 2007-06-05
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Abstract

This paper deals with the static and dynamic output kinematic accuracy of a group of elastic slider-crank mechanisms with the same design parameters by taking the bar length, the joint-gaps, the mass density, and the sectional and the physical parameters as random variables. According to the principle of linear pile-up of small displacement, the static and dynamic output kinematic errors are synthesized, and the reliability model of the kinematic accuracy of the mechanism is built. Through an example, a study of the influencing factors on the reliability of the output kinematic accuracy of the mechanism is made. The results obtained reveal the following facts: with the increase of the crank s rotating speed, the dynamic elastic deformation of the mechanism becomes the principal factor that greatly affects the reliability of the output kinematic accuracy of the mechanism.

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