ZPW-2000A 轨道电路系统的 FMEA 分析研究

摘要

Track circuit is the key equipment of railway signalling systems,and its reliability is ex-tremely important to ensure the safety of railway transportation.On the basis of FMEA theory,a FMEA analysis method for ZPW-2000A Jointless Audio Frequency-shift Modulated Track Circuit system is proposed.The corresponding FMEA content,the division rules of analysis level and fail-ure criterions are defined according to the characteristics of track circuit system,and the confir-ming method of severity,occurrence and detection is also discussed,which is used to calculate the risk priority number (RPN ).Based on the actual working condition of ZPW-2000A Jointless Au-dio Frequency-shift Modulated Track Circuit system,the FMEA analysis is conducted.The re-search indicates that the FMEA method can identify the potential hazards and the weak links which affect system reliability.It provides a practical method and theoretical basis for the reliabili-ty research of ZPW-2000A track circuit system.%轨道电路作为铁路信号系统的关键设备，其可靠性对于保证铁路运输安全极为重要。以 FMEA 理论为基础，提出针对 ZPW-2000A 无绝缘移频轨道电路系统的 FMEA 分析方法；根据轨道电路系统的特性，定义相应的FMEA 分析内容、分析层次划分规则、故障判断依据及严重度、发生度、检测度确定方法，并以此计算风险优先数；结合 ZPW-2000A 无绝缘移频轨道电路系统实际工况，进行 FMEA 分析。结果表明，将 FMEA 运用于轨道电路系统中，可以得到影响系统可靠性的潜在危险因素及薄弱环节，为 ZPW-2000A 轨道电路系统可靠性研究提供一种实用方法和理论依据。