关键词: 多失效模式|退化变迁|粒子群优化|单纯型法|维修决策

Abstract: Aiming at the condition maintenance decision problem of multi-failure mechanism system, a degradation shift model was presented by analyzing multiple different failure mechanisms. According to the state failure process, different failure time of failure mechanism was estimated, and the failure sequence of system was calculated. Based on the degradation shift model, the maintenance strategy of multi-failure mechanism system was analyzed, and the expectation model of average maintenance costs and availability were constructed. For the constructed multi-decision variable model, a combine optimization algorithm of Nelder Mead Algorithm (NMA) and Particle Swarm Optimization (PSO) was designed to solve it. The simulation data of sensor was applied to demonstrate the efficiency of the presented model and methods.

Key words: multi-failure mechanisms|degradation shift|particle swarm optimization|nelder mead algorithm|maintenance decision