Abstract
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.
Highlights
Modular design plays vital roles in the design of large-scale complex equipment with multi-task objectives
On the basis of analyzing the fault modes of the cylindrical cam mechanism motion, a reliability optimization approach based on Monte Carlo Simulation (MCS) is proposed for improving the motion reliability of the interface, which is verified by simulation and prototype experiment
A motion fault analysis method based on MCS is proposed for the interface based on cylindrical cam mechanisms
Summary
Modular design plays vital roles in the design of large-scale complex equipment with multi-task objectives. The interface design based on cylindrical cam mechanisms is the core of iBOSS. In this paper, based on the iBOSS design idea, a mechanical interface based on coupled cylindrical cam mechanisms is proposed, and the prototype is manufactured. Padmanabhan et al [3] studied a Reliability-Based Optimization (RBO) methodology that uses MCS techniques, which provides more accurate results for highly nonlinear problems. Liu et al [11] proposed a reliability assessement approach based on MCS and modular sequence-enforcing fault tree model for repairable phased-mission systems. On the basis of analyzing the fault modes of the cylindrical cam mechanism motion, a reliability optimization approach based on MCS is proposed for improving the motion reliability of the interface, which is verified by simulation and prototype experiment
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