铁路调度指挥系统故障诊断方法  

Fault Diagnosis Method for Railway Dispatching Command System

作　　者：王兴中[1] 王振东[2] 王涛[2] 张琦[2] 

机构地区：[1]中国铁道科学研究院,北京100081 [2]中国铁道科学研究院通信信号研究所,北京100081

出　　处：《中国铁道科学》2011年第6期119-124,共6页China Railway Science

摘　　要：根据铁路调度指挥系统中的故障传播路径特点,建立故障传播的有向图及其模型,设计基于贝叶斯后验概率准则的故障诊断算法。该算法的基本原理是,每1个新增的故障现象都对应着1个故障原因域,依据贝叶斯后验概率准则,计算故障原因域中每1个故障原因的疑似概率,然后按其大小顺序插入既有的故障原因疑似概率集合中。随着故障现象的增加,当故障原因疑似概率集合不再改变时,运算终止。故障原因疑似概率集合中前n个元素能覆盖故障现象时,这n个元素所对应的故障原因,即是诊断结果。实验表明,在单故障模式和双故障模式下,运用这种故障诊断算法得出的结论完全正确,并且在计算机上的运算时间不超过0.8s。According to the characteristics of fault propagation path in railway dispatching command system,the fault propagation digraph and its model were established.The fault diagnosis algorithm based on Bayesian posterior probability rule was designed.The basic principle of this algorithm is that,every new fault phenomenon corresponds to a fault reason domain.The suspected probability of each fault reason in this domain is calculated based on Bayesian posterior probability rule.Then they are inserted into the existing suspected probability set of fault reason according to their size.As the increasing of fault phenomena,the suspected probability set of fault reason is invariant,the analysis operation terminates.In the suspected probability set of fault reason,when the former n elements which can cover the fault phenomena,their corresponding fault reasons are the diagnosis results.Experiments show that,the conclusion obtained by this fault diagnosis algorithm is completely correct in single fault mode and double fault mode,and the computer operation time is less than 0.8 s.

关 键 词：铁路调度指挥系统 故障传播有向图 故障诊断 故障原因 故障现象 贝叶斯后验概率 

分 类 号：U284.59[交通运输工程—交通信息工程及控制] U284.95[交通运输工程—道路与铁道工程]