Method for detecting tiny faults of high-speed train air braking system

Abstract

The invention discloses a method for detecting tiny faults of a high-speed train air braking system and belongs to the field of fault diagnosis. The method for detecting the tiny faults of the high-speed train air braking system comprises the steps that under a normal operation working condition of a high-speed train, multiple sets of braking cylinder pressure measurement data including the wholebraking process are collected, and multiple training datasets are constituted by the braking cylinder pressure measurement data; fault detection statistic of each sample contained by each training dataset is calculated; based on all fault detection statistic information contained by all the training datasets, control limits of mixed fault detection statistic are determined; and under a real-time operation working condition of the high-speed train, current-moment braking cylinder pressure data collected are adopted as test samples, and it is judged whether faults occur or not. According to themethod for detecting the tiny faults of the high-speed train air braking system, historical data are utilized so that modelling can be conducted; data are detected online; the method has no requirements for data distribution; besides, the algorithm is simple, easy to be achieved by a computer and easy to be applied to practice; and the method is applicable to different braking levels and braking stages and has a good detection effect on several types of tiny faults.

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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