系统级故障隔离的间接熵法

摘要

Based on the information flow model, combined with the existingfault isolation strategies and the entropy theory, the essential of system-level fault isolation process is expounded in this paper. It is concluded that the process is a procedure with the system entropy reduced by degree. And the number of the infeasible fault conclusions in the system can be used to scale the system entropy. Then, examined the relationship of tests and tests, tests and fault isolation conclusions, an indirect-entropy algorithm for system-level fault isolation strategy is proposed. By the elimination and analysis, the method is simple and excellent for the fault isolation, the average number of tests for the fault isolation in the experiment is consequently the smallest.%基于信息流模型，综合已有故障隔离策略的基本思想和熵值理论，阐述了故障隔离过程的实质，认为故障隔离过程是不断降低系统熵的过程，并且系统的可能故障结论数可直接衡量系统的熵。在此基础上，通过综合考虑测试与测试、测试与故障隔离结论的关系，提出了系统级故障隔离的间接熵法。分析与仿真实验验证表明，该方法算法简单、故障隔离的效果好、搜索速度快。