摘要
为了克服等周期维护模型忽略设备可靠性要求,以及长期运行期望维护周期模型忽略设备特定阶段维护需求的缺点,通过引入基于役龄递减因子和故障率递增因子的混合式故障率演化规则,建立了有限区间内基于设备可靠性的顺序预防性维护优化模型,并以威布尔分布为例,利用仿真方法对其进行了优化。仿真结果显示,该模型可使设备的维护周期呈递减之势,反映了设备在某一特定阶段的可靠性需求。
System reliability was always neglected by Equal interval Preventive Maintenance （PM） models,meanwhile long-time expected interval PM models usually couldn＇t satisfy the system maintenance need in a finite time horizon. From this perspective, a sequential imperfect PM model was proposed with the consideration of optimized maintenance schedule in a finite time horizon. A hybrid hazard rate recursion rule was developed based on the concept of age reduction factor and hazard rate increase factor to predict the evolution of the system reliability in different maintenance phases. The optimized PM schedule was deduced by minimizing the maintenance cost in the finite time horizon with the assumption that the mean cost per unit time for PM was a function of the reliability threshold R and the improvement factors. Simulation results showed that this reliability centered PM model made a decrease of the PM interval and it could provide maintenance decision support for job shop scheduling.
出处
《计算机集成制造系统》
EI
CSCD
北大核心
2005年第10期1465-1468,共4页
Computer Integrated Manufacturing Systems
基金
国家863/CIMS主题资助项目(2003AA414120)
国家自然科学基金资助项目(50128504)~~
