Method for detecting intermittent faults of high-speed train closed-loop brake braking system

A technology for braking and high-speed trains, applied in railway vehicle testing, measuring devices, testing of mechanical components, etc., can solve problems such as limited duration, and achieve the effect of improving detection capabilities

Active Publication Date: 2019-06-07
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] The purpose of the present invention is to address the shortcomings of high-speed train intermittent fault detection, and propose a method that can deal with the problem of strong autocorrelation between real-time obs

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  • Method for detecting intermittent faults of high-speed train closed-loop brake braking system
  • Method for detecting intermittent faults of high-speed train closed-loop brake braking system
  • Method for detecting intermittent faults of high-speed train closed-loop brake braking system

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Embodiment Construction

[0054] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0055] Such as figure 1 As shown, the intermittent fault detection method of the high-speed train closed-loop braking system specifically includes the following steps:

[0056] Step 11. Offline training:

[0057] 111. Assuming that the high-speed train closed-loop braking system contains m sensors, and the sampling time of the m sensors is the same, then continuously collect N sample data under normal single working conditions, and construct the normal Working condition measurement matrix:

[0058] [X 1 ,X 2 ,...,X N ]∈R m×N (1)

[0059] Among them, X k ∈R m×1 is a column vector;

[0060] 112. Augment the measurement data according to formula (2), and construct the augmented measurement matrix X∈R N×Wm :

[0061]

[0062] Among them, W is the length of the augmented window, and its initial value is taken as ...

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Abstract

The invention discloses a method for detecting intermittent faults of a high-speed train closed-loop brake braking system, and particularly relates to the technical field of fault diagnosis. The defect that an existing high-speed train fault detection technology cannot effectively detect the intermittent faults with small amplitudes and limited duration is overcome. The method comprises the steps:continuously collected sample data under the normal working condition of a plurality of sensors of the high-speed train closed-loop brake braking system are discretely trained, on the basis of obtaining the direction and the fault amplitude lower bound of the intermittent faults of the high-speed train closed-loop brake braking system, flag values of statistical magnitudes of T2, Q, phi and D arecalculated correspondingly, and the statistical magnitude with the largest flag value is selected to conduct fault detection at the online stage.

Description

technical field [0001] The invention relates to the technical field of fault diagnosis, in particular to a method for detecting intermittent faults of a high-speed train closed-loop braking system. Background technique [0002] In recent years, with the rapid development of high-speed trains, the fault detection of its key systems has become a research hotspot. Closed-loop braking system is a subsystem closely related to safety in the high-speed train information control system, and many data-driven fault detection methods have been successfully applied to it. But people pay more attention to the detection of continuous faults, but less attention to the detection of intermittent faults. With the rapid development of electronics, information and other technologies in recent years, intermittent faults have gradually attracted people's attention. Intermittent faults refer to a class of faults that have a limited duration and can still disappear by themselves without external ...

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Application Information

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IPC IPC(8): G01M13/00G01M17/08
Inventor 周东华赵英弘何潇纪洪泉钟麦英王建东
Owner SHANDONG UNIV OF SCI & TECH
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