The model introduced fuzzy state and probability information of faults, which depicted the characteristics that the fault dependence relation was variational along with the state of system or parts.

• 该模型利用图论理论和面向对象建模思想,将复杂系统故障关联关系抽象为一个由三元组描述的有向图,引入故障模糊状态和故障概率信息,体现了故障关系随系统或部件工作状态而变化的特性。