A fault tracing method and system

Abstract

The present invention relates to the field of fault propagation and fault diagnosis traceability, and discloses a fault traceability method and system to quickly and effectively determine the fault occurrence type and fault occurrence point by considering the fault propagation characteristics, and the implementation cost is low; the method of the present invention includes : Set at least two observation points at different positions of the traction drive control system to be tested, and establish the first propagation model; analyze the space-time characteristics of each observation point when different types of faults occur, and establish a fault signal propagation model; establish a fault dictionary; extract the running The fault detection characteristics of each observation point in the data, compare the fault detection characteristics with the set threshold, and judge whether the system is faulty. If a fault occurs, initially determine the fault location, and obtain the fault dictionary matrix corresponding to the location; construct each observation Point the fault feature vector of the real-time operation data, and match the fault feature vector with the rows or some elements in the corresponding fault dictionary matrix to realize fault source 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...

AI Technical Summary

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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