A Study on Fault Diagnosis Technology Based on Failure Mode Analysis of EMU System

Abstract

With the rapid development of railway, the production and operation quality of high-speed EMU is an important factor to ensure the safety of passengers. This paper takes EMU as an overall system, conducts FTA failure mode analysis and FMEA failure mode analysis, obtains a comprehensive system failure mode model, generates a system function failure chain, integrates the failure chain into the fault expert knowledge base, and optimizes the expert knowledge base. According to the system function of EMU, the functional logic diagram of EMU is analyzed and obtained. The field fault information and vehicle status information are analyzed together with the system failure mode model and fault expert knowledge base. The system failure component nodes, failure mode chain, and fault suggestion processing measures are, respectively, output to complete on-site fault processing guidance. The whole process information will be fed back to optimize the accumulation of fault expert knowledge base. The system can rapidly diagnose on-site faults, guide on-site fault handling, effectively improve fault handling efficiency, and play an auxiliary decision-making role.