A micro-fault detection method for high-speed train air brake system

Abstract

The invention discloses a micro-fault detection method for an air brake system of a high-speed train, which belongs to the field of fault diagnosis. The method comprises: collecting multiple groups of brake cylinder pressure measurement data including the whole braking process under the normal operation condition of the high-speed train Constitute multiple training data sets; calculate the fault detection statistics of each sample contained in each training data set; determine the control limit of the mixed fault detection statistics based on all the fault detection statistics information contained in all training data sets; Under the real-time operating conditions of high-speed trains, the collected brake cylinder pressure data at the current moment is used as a test sample to determine whether there is a fault. The invention utilizes historical data modeling and online data detection, has no requirements for data distribution, and has a simple algorithm, which is easy for computer implementation and practical application, is applicable to different braking levels and braking stages, and has good detection for several types of micro-faults Effect.

Description

technical field [0001] The invention belongs to the field of fault diagnosis, and in particular relates to a small fault detection method for an air brake system of a high-speed train. Background technique [0002] In recent years, the high-speed rail technology in many countries around the world has achieved rapid development, and the operating mileage of high-speed rail has continued to increase. In particular, my country's high-speed rail has achieved world-renowned achievements. As of the end of 2018, my country's high-speed rail operating mileage exceeded 29,000 kilometers, accounting for two-thirds of the world's total operating mileage of high-speed rail. As the core of the high-speed rail system, high-speed trains are closely related to passengers and staff, and their safe operation is of paramount importance. The high-speed train information control system can be divided into several subsystems, among which the braking system is mainly used to ensure that the train...

AI Technical Summary

Problems solved by technology

However, there are still deficiencies in this type of strategy: for example, the variance between variables is invalid for the faults of upstream components in the air brake system, such as EP valves and relay valves in closed-loop control; Ineffective detection of high-degree leakage and small-amplitude multiple sensor faults

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