基于最小割集的系统可靠性评价方法研究

The method research of system reliability evaluation based on MCS

系统可靠性是指系统在规定的时间内,在规定的使用条件下完成规定功能的能力。对系统可靠性评价是系统全生命周期中的重要环节。最小割集反应了导致系统故障发生的最少的故障组成模式,表征了系统故障的必要条件,因此基于最小割集,可以方便地对系统进行可靠性分析。利用故障事件之间的因果关系,形成产生式规则集,并通过事件逻辑关系的布尔运算,实现求解特定规则集中最小割集的方法,再利用模糊理论求解最小割集置信度,进行定性和定量的系统可靠性评价。

System reliability refers to a system capacity to complete the prescribed function within a specified period of time and under specified conditions. So system reliability evaluation is an important part in system life cycle. Reliability analysis which was based on minimal cut sets （MCS） reacted minimal faults composition model which was necessary conditions for a system failure causing a system failure, so it can easily for system reliability evaluation by MCS, Based on this, by use of a causal relationship between the failure events form MCS of production rules, we can achieve a good way to so[ve MCS under specific rules through the events of Boolean logic, and then solving the MCS confidence interval based on fuzzy theory ,then we can make the reliability evaluation.