Fault tracing method and system

Abstract

The invention relates to the field of fault propagation and fault diagnosis and tracing, and discloses a fault tracing method and system. The fault occurring type and the fault occurring point are quickly and effectively determined while the fault propagation characteristic is considered, and the implementation cost is low. The fault tracing method comprises the steps of arranging at least two observation points at different positions of a to-be-tested traction transmission control system, and building a first propagation model; analyzing time-space characteristics of all the observation points when different types of faults occur, and building a fault signal propagation model; building a fault dictionary; extracting fault detection characteristics of all the observation points in runningdata, comparing the fault detection characteristics with a set threshold value, and judging whether or not the system has a fault; if yes, preliminarily judging the occurring position of the fault, and obtaining a fault dictionary matrix corresponding to the position; constructing fault characteristic vectors of real-time running data of all the observation points, and matching the fault characteristic vectors with rows or partial elements in the corresponding fault dictionary matrix to achieve fault tracing.

Description

technical field [0001] The invention relates to the field of fault propagation and fault diagnosis traceability, in particular to a fault traceability method and system. Background technique [0002] Safe operation is the primary issue for the operation and development of high-speed trains. However, due to the high speed, harsh operating environment and long-term operation of high-speed trains, problems such as aging or failure of components of high-speed trains may occur, which will bring serious problems to the operation of high-speed trains. security risks. Among them, the traction transmission control system is an important part of the information control system, one of the key systems for the safe operation of high-speed trains, and the main source of high-speed train failures. Any failure or potential safety hazard of the traction drive control system may trigger a chain reaction and even lead to catastrophic consequences if the root cause of the failure cannot be dia...

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Problems solved by technology

[0003] Fault diagnosis is an important monitoring technology for the reliable and safe operation of complex systems, and its theoretical research results are rich. However, at present, the fault diagnosis of high-speed train traction drive control system mainly focuses on the failure of components or subsystems in a single position of the traction drive control system. Diagnostic studies, lack of research on the problem of fault propagation mechanism

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