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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2018, Vol. 39 ›› Issue (11): 422133-422141.doi: 10.7527/S1000-6893.2018.22133

• Material Engineering and Mechanical Manufacturing • Previous Articles     Next Articles

Time-dependent reliability and sensitivity analysis for planar motion mechanisms with revolution joint clearances

LIU Fuchao, WEI Pengfei, ZHOU Changcong, ZHANG Zheng, YUE Zhufeng   

  1. School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an 710129, China
  • Received:2018-03-10 Revised:2018-03-31 Online:2018-11-15 Published:2018-05-15
  • Supported by:
    Natural Science Basic Research Plan of Shaanxi Province (2017JQ1007); National Natural Science Foundation of China (51608446); Natural Science Foundation of Shaanxi Province (2017JQ1021); Fundamental Research Fund for Central Universities (3102018zy011)

Abstract: Based on the method for reliability and sensitivity analysis of the time-dependent motion mechanism, an analysis method for calculating the global sensitivity index of the planar motion mechanism with revolution joint clearances is developed, considering the influence of revolution joint clearances of the motion mechanism on kinematic accuracy. Firstly, the envelope function is derived based on the error function of the motion mechanism, and then a formula for calculating the reliability of the mechanism is obtained. The method for global sensitivity analysis for the time-dependent planar motion mechanism is used to obtain a computation formula for the global sensitivity index of the planar motion mechanism with revolution joint clearances. Finally, the method proposed in this work is applied in two mechanism examples. The estimation results agree well with the results obtained with the Monte Carlo method, and have higher accuracy and lower computational costs.

Key words: revolution joint clearance, planar motion mechanism, envelope function, reliability analysis, global sensitivity analysis

CLC Number: