T-S模糊故障树重要度分析方法

Importance Analysis Method of Fuzzy Fault Tree Based on T-S Model

传统部件重要度分析方法建立在布尔逻辑门的基础上,需要精确已知部件之间的联系,并且不能全面考虑部件所有状态及部件之间的联系对多状态系统可靠性的影响。针对上述问题,首先通过给出传统二态、多态逻辑门的T-S门规则形式,验证了T-S模糊故障树分析方法的可行性,进而将传统二态和多态部件重要度分析方法推广到T-S模糊故障树中,提出了T-S重要度概念及其计算方法,包括T-S结构、概率及关键重要度。然后,与传统部件重要度分析方法进行算例对比与分析,验证方法的可行性。最后,给出了液压系统T-S模糊故障树分析及其重要度计算实例。

The component importance based on Boolean logic gates,which needed to know exactly the relationships among the components,and could not take into account the influences of all states and components interrelations on the reliability of multi-state system.Therefore,it is proved that an analysis method of fuzzy fault tree based on T-S model is feasible by giving the T-S rules of conventional binary and multi-state logic gates.Further,this paper extended the component importance analysis method of conventional fault tree to fuzzy fault tree based on T-S model.The concept and calculation method of T-S importance were presented,including T-S structural,probability and criticality importance.Finally,an example of fuzzy fault tree analysis based on T-S model and importance computation of hydraulic system were given for illustration.