动车组列控车载子系统故障机理建模与分析  

Modeling and analysis of the fault mechanism in the on-board control subsystem of EMU trains

作　　者：齐金平[1] 刘皓皓 QI Jinping;LIU Haohao(School of Mechatronic Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学机电工程学院,兰州730070

出　　处：《安全与环境学报》2024年第11期4171-4180,共10页Journal of Safety and Environment

基　　金：国家自然科学基金项目(71861021,72361019);甘肃省重点研发项目(23YFGA0050)。

摘　　要：针对传统Petri网(P/T系统)无法根据后继标识确定系统失效部位的问题,采用着色Petri网(Colored Petri Net,CPN)建立动车组列控车载子系统的故障传播模型。首先,通过CPN与传统Petri网理论的对比说明采用CPN建模的可行性。其次,根据车载子系统的结构组成及工作模式建立故障树模型,并通过Petri网描述故障树逻辑门事件之间的逻辑关系,给出故障树的Petri网表示方法,建立车载子系统的P/T系统模型;进一步根据CPN理论确定托肯染色方法、权函数等模型参数,将P/T系统转化为着色网系统,并举例说明后继标识的计算规则。最后,通过与传统Petri网推理及故障识别过程的对比,证明了采用CPN分析系统故障机理的正确性及在故障识别过程中的高效性。所提方法可为车载子系统的故障识别提供一定依据。The traditional Petri net model(P/T system)is unable to identify the specific failure components of the system based on successor markings,which hinders the efficiency of fault identification.To address this limitation,a Colored Petri Net(CPN)was employed to develop a fault propagation model for the on-board control subsystem of EMU trains.First,the feasibility of CPN modeling was established by comparing it with traditional Petri net theory,including a presentation of the calculation formulas for state transitions in both CPN and traditional Petri nets.Second,an analysis of the structural composition and operational modes of the on-board subsystem was conducted,leading to the identification of the logical relationships between the units that comprise the subsystem.Based on the logical relationships among the units and utilizing the fault tree modeling method,a fault tree model for the on-board subsystem was established.Furthermore,it is possible to transform between fault trees and Petri nets,allowing the logical relationships between events in the fault tree's logic gates to be represented by the state transition rules of the Petri net.Consequently,each subtree of the fault tree was represented using a Petri net,resulting in the traditional Petri net model of the on-board subsystem.Subsequently,based on this traditional Petri net,model parameters such as the token coloring method and weight function were defined according to CPN theory.This allowed for the conversion of the traditional Petri net of the on-board subsystem into a colored net system.The calculation rules for successor markings were illustrated through an example.Finally,the fault mechanism of the on-board subsystem was analyzed using both CPN and traditional Petri net methods,demonstrating that each approach can effectively describe the dynamic transfer process of faults within the system.Subsequently,faults were diagnosed using both methods,allowing for a comparison of the speed of fault identification between the two approaches.The results indic

关 键 词：安全工程 车载子系统 故障机理 故障树分析(FTA) 着色Petri网(CPN) 共因失效 

分 类 号：X951[环境科学与工程—安全科学]