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Robust intermittent sensor fault diagnosis method of high-speed train key system

A technology for sensor faults and high-speed trains, applied in the field of signal processing, can solve problems such as inability to diagnose new train faults, diagnosis function dependent on the richness of fault code tables, and only diagnosis

Inactive Publication Date: 2018-02-16
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] However, the existing high-speed train fault diagnosis technology has many limitations, such as simple threshold value comparison, combined with strategic operation steps, does not fully explore the redundant information that can be used for fault diagnosis; the diagnostic function relies heavily on the richness of the fault code table , can only diagnose the existing common faults in the fault code table, and cannot diagnose new faults generated in the actual operation of the train; more consideration should be given to permanent faults, but not intermittent sensor faults caused by electromagnetic interference and other factors

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  • Robust intermittent sensor fault diagnosis method of high-speed train key system
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  • Robust intermittent sensor fault diagnosis method of high-speed train key system

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Embodiment Construction

[0076] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0077] A robust intermittent sensor fault diagnosis method for key systems of high-speed trains, the process is as follows figure 1 As shown, it specifically includes the following steps:

[0078] Step 1: Establish a discrete-time state-space model of key systems of high-speed trains and identify model parameters

[0079]

[0080] in, They are system state, control input and measurement output respectively; are process noise and measurement noise, respectively; for sensor failure; is the system parameter; is the parameter uncertainty; the following conditions are met: the mean value, covariance, and second-order moment of the initial state x(0) are P 0 , Σ 0 ; noise w(k), the mean of v(k) is zero, and the covariance matrix is ​​Σ w(k) , Σ v(k) ;parameter uncertainty A δ (k), B δ (k), C δ (k) has a mean of zero and the c...

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Abstract

The present invention discloses a robust intermittent sensor fault diagnosis method of a high-speed train key system, and belongs to the signal processing field. The method comprises the steps of establishing a discrete time state spatial model of the high-speed train key system; designing a robust residual generator of the high-speed train key system; designing a robust intermittent sensor faultdetection method of the high-speed train key system; and designing a robust intermittent sensor fault separation and estimation method of the high-speed train key system. The robust intermittent sensor fault diagnosis method of the present invention guarantees the actual application demands of the intermittent sensor fault diagnosis of the high-speed train key system effectively.

Description

technical field [0001] The invention belongs to the field of signal processing, and in particular relates to a robust intermittent sensor fault diagnosis method for key systems of high-speed trains. Background technique [0002] High-speed train is the system most closely related to passengers in high-speed rail technology, and its safe and stable operation is the basis and premise for the healthy and rapid development of high-speed rail. Fault diagnosis technology is the key technology to ensure the safe operation of high-speed trains. At present, high-speed trains have adopted many technical measures and systems to improve the reliability and safety of train operation. [0003] However, the existing high-speed train fault diagnosis technology has many limitations, such as simple threshold value comparison, combined with strategic operation steps, does not fully explore the redundant information that can be used for fault diagnosis; the diagnostic function relies heavily o...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 周东华张峻峰何潇卢晓
Owner SHANDONG UNIV OF SCI & TECH
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