关键词: 串并混联系统, 预防维护, 机会维护, 产能失效率, 开动率

Abstract: To improve the capacity of manufacturing system,a Preventive Maintenance (PM) decision model for three-unit series-parallel systems was proposed.Based on universal generating function,a model of capacity-based failure rate was distributed by considering the failure rate,capacity and configuration of each machine in three-unit series-parallel system.Opportunistic maintenance policy was proposed by integrating failure rate threshold of machines,capacity-based failure rate threshold of system and opportunity maintenance threshold.The numerical examples were illustrated to show the application of the proposed model and the advantage of the proposed PM policy.

Key words: series-parallel system, preventive maintenance, opportunistic maintenance, capacity-based failure rate, availability