Intermittent fault detection method and system of ATO (automatic train operation) controlled high-speed train brake system

Abstract

The invention discloses an intermittent fault detection method and system of an ATO (automatic train operation) controlled high-speed train brake system. The method includes the steps of establishing a linear approximation model of the high-speed train brake system under the influence of intermittent faults; based on the linear approximation model, establishing a scalar residual generator for intermittent faults of an actuator of the high-speed train brake system; based on the scalar residual generator, generating a detection signal, and performing hypothesis testing via the detection signal so as to detect the intermittent faults of the high-speed train brake system. The intermittent fault detection method and system has the advantages that the intermittent faults of high-speed trains can be accurately and quickly detected under the unknown disturbances and measurement noises, detection performance is quantified, and detectability of the intermittent faults is analyzed.

Description

technical field [0001] The invention relates to the technical field of fault diagnosis of high-speed train braking systems, in particular to a detection method and system for intermittent faults of high-speed train braking systems controlled by ATO (Automatic Train Operation, automatic train operating device). Background technique [0002] The braking system is an important part of the high-speed train operation control system, which is directly related to the safety of the high-speed train operation. Braking distance and precise stopping are important indicators to measure the performance of the braking system and the braking capacity. The braking power of a high-speed train is not only proportional to the cube of the train's running speed, but also inversely proportional to the braking distance. Therefore, performance monitoring of the braking system of high-speed trains and timely detection of intermittent faults of the braking system are important guarantees for improvi...

AI Technical Summary

Problems solved by technology

[0004] The principle of the braking system is not complicated, but due to the characteristics of the braking system such as delayed system response and slow command transmission speed, it is very difficult to monitor the performance of the braking system

Most of the existing detection methods for braking systems are data-driven methods for permanent faults, which require a large amount of sensor measurement data, and are limited by the hardware resources of high-speed trains. They can only perform simple detection, but cannot detect intermittent faults. Effective detection, let alone timely and accurate determination of the occurrence and disappearance of intermittent faults to achieve accurate detection of intermittent faults and real-time monitoring of braking system performance

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