The motion fault modes of a mechanical interfacenbased on coupled cylindrical cam mechanisms were presented.
The performance functions of the interface are established for analyzing the motion faults based on Monte Carlo simulation.
The fault probability of the interface is inversely proportional to the rotation speed of the drive ring. When the protrusion length of the interface case is extended to 3-3.8mm, the fault probability becomes zero.
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.
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