关键词: 预防性维护, 维护时刻点, 缓冲区, 随机模型, 建模

Abstract: To improve the equipment reliability，an optimization modeling method of equipment preventive maintenances with buffers was presented.The optimal preventive maintenance time point was found，and an expected cost model was constructed with preventive maintenance time point as stochastic variables. On these basis，an evolution algorithm to solve the optimal maintenance time point was established. The optimal calculation procedure of the algorithm was also presented.Through the sensitivity analysis of multiple parameters，the interactive relationship between the optimal time point and the relevant parameters was determined.Experiment results indicated that the proposed optimal modeling method was effective and practical for finding the optimal maintenance time point.

Key words: preventive maintenance, maintenance time point, buffer, stochastic models, modeling