【摘要】 针对正在研制的２００ ｋｍ／ｈ 电动车组，阐述了车载故障诊断系统的目的和任务、诊断的原则和方法，提出了车载故障诊断系统的模型和故障评估的层次结构，并讨论故障的分类、列车网络通信协议对故障数据传输的支持、诊断推理的方法等相关问题。更多还原

【Abstract】 With the development of the 200 km/h EMU,the paper describes the aim and task of the vehicle borne diagnosis system,and the diagnosis principle and method as well.The diagnosis model,hierachical structure,and the diagnosis evaluation of the whole train are also proposed.Finally it discusses the diagnosis classification,the network data communication protocol supporting fault data transmission and the other related problems such as the theory of diagnosis reasoning,diagnosis model and evaluation train set.更多还原