关键词: 拓展几何过程, 冷贮备, 拟周期, 预防性维修, 两单元系统, 维修窗口

Abstract: The geometric maintenance process and its extended model are main tools to study the standby system that can better describe the distribution of continuous faults and its maintenance time.To study the optimization problem of quasi-period maintenance window that was dynamically and randomly distributed after periodic Preventive Maintenance (PM) affected by some factors such as production cycle and maintenance capacity,aiming at the two-unit diverse cold-standby system,a quasi-periodic PM policy optimization model with a maintenance window was constructed by assuming that the failure process of main unit and spare unit were subject to the extended geometric process with recovery factor and exponential distribution respectively.The optimal quasi-periodic PM policy was obtained by maximizing the revenue rate of system.The influence of system parameters on the optimized results was discussed through sensitivity analysis.

Key words: extended geometric process, cold-standby system, quasi-periodic, preventive maintenance, two-unit system, maintenance window