Failure monitoring method and failure monitoring system for brake cylinders of motor train unit

Abstract

The invention discloses a failure monitoring method and failure monitoring system for bake cylinders of a motor train unit. The monitoring method comprises the following steps of obtaining pressure measuring data of the brake cylinders in the braking process under the normal working condition to form a training data set; calculating variable between-psu variance of each sample in the training data set and determining the threshold of the variable between-psu variance; acquiring the pressure measuring data of each brake cylinder at current time in real time to be used as a test sample, and judging whether the test sample fails or not by using the threshold of the variable between-psu variance; and if yes, sequentially obtaining the restructured contribution value of the pressure measuring data of each brake cylinder in the test sample, and determining the brake cylinder of the maximum restructured contribution value to be the failing brake cylinder. According to the method, failures can be timely detected and separated, and the failing brake cylinder or a pipeline where the failing brake cylinder is arranged can be indicated, so that predication of a major failure can be realized, and the method provides a certain reference for the timely maintenance and replacement for components; therefore, the generation of even more serious failures can be effectively avoided.

Description

technical field [0001] The invention relates to the field of industrial monitoring and fault diagnosis, in particular to a fault monitoring method and a fault monitoring system for a brake cylinder of an EMU. Background technique [0002] With the continuous improvement of the running speed of the EMU, people's demand for the safety of the EMU operation is also increasing, which puts forward higher requirements for the braking technology of the EMU. Although the dynamic braking technology of EMUs has made great progress in recent years, air braking technology is still an indispensable part of EMUs' braking technology, which is of great significance to ensure the safe operation of EMUs. [0003] As the basic braking device of the air braking system of the EMU, the brake cylinder, together with the brake caliper and the brake disc, constitutes the execution link of the air braking system. Among them, the brake cylinder, as a key component of the air brake system of the EMU, p...

AI Technical Summary

Problems solved by technology

This kind of failure is usually caused by a very serious brake cylinder or leakage of the pipeline, and the failure of inflation / exhaust or serious slow inflation / exhaust caused by the abnormal function of the brake cylinder

For the slight leakage of the brake cylinder or the pipeline where it is located, or the slow inflation / exhaust failure caused by the performance degradation of the brake cylinder, the existing monitoring logic does not cover

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