基于功能检测的备用系统维修优化研究  

Study on Optimal Maintenance of Standby Systems Based on Function Inspection

作　　者：吕德峰[1] 左洪福[1] 蔡景[1] 

机构地区：[1]南京航空航天大学民航学院,江苏南京210016

出　　处：《航空学报》2009年第4期660-665,共6页Acta Aeronautica et Astronautica Sinica

基　　金：国家"863"计划(2006AA04Z427);国家自然基金委员会与中国民用航空总局联合资助项目(60672164)

摘　　要：为了减小或消除主系统故障的后果,机械中经常采用备用系统在主系统故障时代替其完成功能。根据某些机械设备的备用系统故障具有延迟性的特点,提出了不等间隔的功能检测策略;建立了该策略下备用系统的可用度模型和费用率模型;以系统可用度为约束,维修费用率为目标,建立了不等间隔功能检测维修策略下的维修优化模型;最后给出了优化模型的求解算法,得到了维修间隔的确定方法并进行了实例验证分析,结果表明:当首次检测间隔是重复检测间隔的3倍时采用不等间隔的功能检测优化模型比采用等间隔的功能检测优化模型节约9.55%。In order to reduce or eliminate the consequences of the failure of the main system of some mechanical equipment, a standby system is often used to replace the failed main system and complete its function. Because of the characteristic of delay of failure of some standby mechanical systems, a functional check policy of variant intervals is proposed and the availability mathematical model and cost rate mathematical model of the standby system are provided in accordance with the check policy. An optimal maintenance model is constructed to cal- culate the variant check intervals under the policy, which aims to minimize maintenance cost rate, and is sub- ject to system availability. Furthermore, the algorithm of the optimal maintenance model is also provided, through which the values of variant intervals can be obtained. Finally, an example is given for case study, and the result proves that the cost of the variant intervals model decreases by 9.55 % as compared with that of the equal interval model when the initial check interval is 3 times the interval for renetitive inspection.

关 键 词：功能检测 可用度 维修费用 维修优化 维修间隔 

分 类 号：TH137.51[机械工程—机械制造及自动化]