关键词: 预防性维修, 多部件系统, 成组维修, 可靠性, 成本, 优化

Abstract: By analyzing the optimal Preventive Maintenance (PM) policy of equipment single-component, an economic optimization model for multi-component group PM was proposed. An optimization method of non-periodic PM schedule for multi-component equipment was proposed. Not only the main taches including preventive maintenance and replacement but also some minor maitenance taches used by non-expectiing failure were considered in this model. Reliability deterioration caused by PM was also taken into account. Several PM activities were grouped together to reduce shot down loss according to whether they have reached the PM opportunity threshold. PM cost constitution of multi-component system was analyzed. Reliability-centered maintenance cost optimization model for multi-component system was established. The optimal PM schedule which could provide satisfactory levels of reliability to multi-component of the equipment and minimum maintenance cost at the same time was obtained by the simulation in Matlab program. Simulation results demonstrated that the proposed method could save much cost compared to the policy which conducted replacement or maintenance for each component separately.

Key words: preventive maintenance, multi-unit system, group maintenance, reliability, cost, optimization