考虑故障零件更换时间的温贮备串联系统可靠性  

Reliability Model for Warm Standby Series System Considering Replacement Time of Fault Unit

作　　者：印明昂[1] 孙志礼[1] 徐璐[2] 杜永英[3] 

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819 [2]东软集团商用软件事业部,辽宁沈阳110004 [3]沈阳化工大学机械工程学院,辽宁沈阳110142

出　　处：《东北大学学报（自然科学版）》2014年第4期559-563,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51205052)

摘　　要：以2个部件的串联系统为例,为每个部件配1个相同的备件,并为系统安排2个修理工对其进行维护.在考虑修理工可协同工作和故障部件更换需要时间的情况下,以保证系统正常工作为前提,建立该系统模型.通过状态转移率矩阵,建立了系统可用度、可靠度、故障频率及首次故障前平均时间等可靠性指标的计算模型.计算结果表明,系统稳态可用度随子系统部件寿命增长而增长,并且当两子系统部件寿命相当时系统稳态可用度增益最明显.本研究为进一步研究复杂机械系统的可靠性提供了理论基础.Taking the series system of two units as example, each unit was matched with a same spare unit, and two repairmen were arranged to perform maintenance of the system. In considering that the repairman can coordinate work and replacement time of fault unit, a system model was established on the basis of normal work of the system. A formula of system availability, system reliability, rate of occurrence of failure and mean time to first failure was derived by operating the state transition probability matrix. The results showed that the system steady-state availability increases with working life of the subsystem. Especially when the working lives of the two subsystems are at the same level, the gain of system steady-state availability is the most obvious. This study provides theoretical basis for the further study of complex mechanical system reliability.

关 键 词：系统可靠性 可用度 温贮备 串联系统 马尔科夫过程 

分 类 号：TB114.3[理学—概率论与数理统计]