CAJ | 학술논문

针对冗余复杂系统的多故障诊断问题，为减小计算量和期望测试费用，设定一个概率值作为概率阈，忽略发生概率低于这个值的多故障状态，提出了一种基于概率阈的冗余多故障诊断策略。该策略首先对相关矩阵模型进行转化，并舍弃概率低于概率阈故障状态，然后用 Roll-out算法对基于信息熵的诊断策略进行优化，并给出了计算步骤与方法。实例表明，与文献中方法相比该策略虽然降低了一定的准确度，但减少了更大比例的期望测试费，而且降低了相关性矩阵模型的规模，缩短了计算时间。
침대용여복잡계통적다고장진단문제，위감소계산량화기망측시비용，설정일개개솔치작위개솔역，홀략발생개솔저우저개치적다고장상태，제출료일충기우개솔역적용여다고장진단책략。해책략수선대상관구진모형진행전화，병사기개솔저우개솔역고장상태，연후용 Roll-out산법대기우신식적적진단책략진행우화，병급출료계산보취여방법。실례표명，여문헌중방법상비해책략수연강저료일정적준학도，단감소료경대비례적기망측시비，이차강저료상관성구진모형적규모，축단료계산시간。
Aimed at the problem of the multiple fault diagnosis of redundant system,a multiple fault diag-nosis strategy for redundant system based on probability is proposed to reduce the computation and the ex-pectant costs under condition that a probability value is set as a probability threshold and the multi-fault state whose probability is lower than the value of this probability threshold is neglected.First,this strate-gy is used to optimize the relation matrix model,and give up the multi-fault states whose probability is lower than the probability threshold.And then,Rollout algorithm is used to optimize the information en-tropy based diagnosis strategy.The example demonstrates that though the expectant costs are lowered by the strategy into a certain accuracy,a great proportion of the expectant test costs is reduced ,the size of the fault-test relation matrix model is minimized,and the calculation time is reduced.