混联可维修系统的可靠性分析与计算

Reliability Analysis and Calculation of Compound Repaired System

不可维修的系统可以通过其结构函数由零部件的可靠性直接算出系统的可靠性,可维修系统的可靠性计算则非常复杂,没有一般规律.以最简单的混联可维修系统为例,在假定部件相互独立、工作时间和维修时间均服从指数分布等条件下,建立了可靠性数学模型,推导出了系统的瞬时可用度、稳态可用度、稳态故障频率、平均开工时间、平均停工时间、平均周期和平均失效前时间等可靠性参数的计算公式,推广了有关结论.

The reliability of non-repairable system can be calculated directly from its structure function by the component＇s reliability,but the repairable system＇s reliability calculation is very difficult because there is no general pattern. Take the simplest compound repairable system as an example,on the assumption that components are independent for each other,work time and repair time both obey exponential distribution and other basic conditions,the reliability mathematical model is established,the reliability parameters,such as instantaneous availability,stable availability,stable fault frequency,mean time between failures,mean down time,mean period and mean time to failures etc all are derived,which generalized some relevant conclusions.