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Fault mode analysis and reliability optimization design of a mechanical interface based on cylindrical cam mechanisms

Li Jian-Hao, Liu Zhi-Jie, Wang Da-Peng, Tian Yun, Zhao Yu-Chong

Eksploatacja i Niezawodność

2020

Vol. 22, no. 4

715--723

The mechanical interface has the characteristics of low shock and vibration, and is emphasized in the aerospace and ocean engineering fields. In this paper, a mechanical interface based on coupled cylindrical cam mechanisms is designed. It can achieve the expected functions, but there exist faults in some times. The fault modes and causes of the interface are firstly analyzed. Then a design approach based on Monte Carlo simulation is presented for analyzing and optimizing its reliability. According to the fault modes, the performance functions of the interface are established for obtaining the optimal scheme. A case is given to illustrate the proposed method. The simulation results and the prototype experiments prove that the optimization scheme effectively improves the reliability of the interface, and has better performance than the original one.