基于最小碰集的多故障诊断算法研究

目前存在的测试性分析和故障诊断工具基本都是基于单故障假设,不适用于复杂系统。针对这一问题,研究了多故障假设下的序贯测试算法。提出了利用分类HS-树(CHS-树)计算最小碰集(MHS)的算法;以多故障状态集的MHS作为故障状态,生成最优单故障测试策略;以决策树中各叶节点的MHS为判断依据来决定下一步要执行的测试,最终生成多故障诊断策略。最后给出案例分析,结果表明:计算MHS的算法能够提高诊断策略的生成效率;诊断策略能够有效隔离多故障问题。

Multiple Fault Diagnosis Algorithms Based on Minimal Hitting Sets

Current testability analysis and fault diagnosis tools are basically based on single-fault assumption,which is not suitable for complex system.Aiming at this point,a new sequential testing algorithm for multi-fault diagnosis was presented.It is train of thought of generating the multiple fault diagnosis strategy that the algorithm of computing minimal hitting set(MHS) was proposed by the classified hitting set(CHS) tree;the optimal signle-fault testing strategy was generated by taking MHS of multi-fault sta...