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High-speed train robust intermittent sensor fault detection method under condition of limited resolution

A sensor failure, high-speed train technology, applied in the field of signal processing, can solve problems such as the inability to detect intermittent sensor failures, and achieve the effect of ensuring smooth and safe operation, reasonable design, and good results

Inactive Publication Date: 2017-11-17
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

However, the existing robust sensor fault detection methods rely heavily on the model uncertainty structure, and need to obtain prior information such as the corresponding uncertainty structure and structural parameters.
In addition, existing methods are usually only capable of detecting permanent sensor failures and cannot detect intermittent sensor failures in resolution-limited situations

Method used

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  • High-speed train robust intermittent sensor fault detection method under condition of limited resolution
  • High-speed train robust intermittent sensor fault detection method under condition of limited resolution
  • High-speed train robust intermittent sensor fault detection method under condition of limited resolution

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Embodiment Construction

[0069] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0070] A robust intermittent sensor fault detection method for high-speed trains with limited resolution, the process is as follows figure 1 As shown, its structure is as figure 2 As shown, it specifically includes the following steps:

[0071] Step 1: Build a soft sensor model

[0072] The state equation of the key system of the high-speed train is shown in formula (1):

[0073] x(k+1)=(A c (k)+A δ (k))x(k)+(B c (k)+B δ (k))u(k)+w(k), (1);

[0074] in, is the system state; for control input; is the process noise; is a process parameter; is the process parameter uncertainty.

[0075] Resolution is The actual measurement equation of the sensor is shown in formula (2):

[0076] y(k)=(C c (k)+C δ (k))x(k)+v(k)+Δ(y(k))+f(k), (2);

[0077] in, is the actual measurement output (satisfying ); Inducing uncertainty for the re...

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Abstract

The invention discloses a high-speed train robust intermittent sensor fault detection method under the condition of limited resolution, and belongs to the field of signal processing. The method comprises the step of establishing a soft measurement model, the step of designing a robust residual error generator and the step of designing a fault detection strategy. The sensor state can be monitored online in real time so that smooth and safe operation of the high-speed train can be guaranteed, and the practical application requirement of intermittent sensor fault detection can be met.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a fault detection method for a robust intermittent sensor of a high-speed train under the condition of limited resolution. Background technique [0002] There are many sensors in high-speed trains, and the working environment of these sensors is harsh, and intermittent failures are common, which poses a huge safety hazard to the safe operation of high-speed trains. [0003] Sensor fault detection technology can use various redundant information to monitor the sensor, which is an effective method to improve the reliability of the sensor and has received widespread attention. However, the existing robust sensor fault detection methods rely heavily on the model uncertainty structure, and need to obtain prior information such as the corresponding uncertainty structure and structural parameters. In addition, existing methods are usually only able to detect perma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D18/00
CPCG01D18/00
Inventor 周东华张峻峰何潇卢晓
Owner SHANDONG UNIV OF SCI & TECH
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