基于故障树的高速动车组网络故障分析系统

Fault Analysis System for High Speed EMU Control Network Based on Fault Tree

目前高速动车组的故障分析是根据系统的工作原理、特点、功能及架构,对所有引发故障的原因进行分类汇总及罗列;一旦故障发生,则按既定程序逐一检查并排除。此方法分析步骤较为固定,不能相对准确地反映出系统各不同层次故障间的关系。对此,文章提出一种基于故障树的高速动车组网络控制系统故障分析方法,其在故障情况分析的基础上建立相应的故障树模型,通过逻辑推理查找出导致所列举的中间事件发生的所有的直接原因;并采取演绎法不断延伸及挖掘,快速确定故障分析的最优程序。为实现对故障数据库更便捷的查看、浏览及分析,基于该故障树的方法,文章结合VB编程及Access数据库软件,设计了一套基于故障树的高速动车组网络故障分析系统,以协助技术人员快速分析故障。以受电弓不可用故障为例,实际应用结果表明,应用高速动车组网络故障分析系统,可简化故障诊断流程,快速定位故障,得到故障诊断建议,缩短故障分析时间0.5 h以上。

At present,fault analysis of high speed EMU is to classify and list all the fault causes according to the working principle,characteristics,functions and structure of the system.Once a fault occurs,it checks and eliminates fault causes one by one according to the established procedures.The analysis steps of this method are relatively fixed,and cannot accurately reflect the relationship between the faults at different levels of the system.This paper proposes a fault analysis method for the network control system of high speed EMU based on fault trees.That is,on the basis of analyzing the fault conditions,a corresponding fault tree model is established,all the direct causes of the listed intermediate events are found out through logical reasoning,and a deductive method is adopted to continuously extend and excavate in order to quickly determine the optimal procedure for failure analysis.As to realize more convenient viewing,browsing and analysis of fault database,based on the method of fault tree,this paper combines VB programming and Access database software to design a fault tree based high speed EMU network fault analysis system to assist technicians in quickly analyzing faults.As an example of pantograph malfunction,through the application of the high speed EMU network fault analysis system,it can be seen that the system can simplify the fault diagnosis process,quickly locate the fault,obtain fault diagnosis suggestions,and shorten the fault analysis time by more than 0.5 h.