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Tiny fault diagnosis method for final controlling element of high-speed train suspension system

A suspension system and high-speed train technology, applied in the field of high-speed train suspension system fault diagnosis

Active Publication Date: 2014-11-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

At present, on the one hand, there are very few studies on active suspension fault diagnosis, and on the other hand, the research on micro-fault diagnosis of suspension system of high-speed train closed-loop control structure and its engineering application are still blank.

Method used

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  • Tiny fault diagnosis method for final controlling element of high-speed train suspension system
  • Tiny fault diagnosis method for final controlling element of high-speed train suspension system
  • Tiny fault diagnosis method for final controlling element of high-speed train suspension system

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Embodiment Construction

[0054] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0055] The present invention designs a method for diagnosing minor faults of high-speed train suspension actuators, and its structural framework is as follows: figure 1 As shown, the steps are as follows:

[0056] Step 1: According to figure 2 For the vertical suspension system shown, establish its state space equation:

[0057] x . ( t ) = Ax ( t ) + Bu ( t ) + Bd ( t )

[0058] z(t)=Gx(t)+Hu(t)+Hd(t)

[0059] in, is the derivative of the state variable x(t), x(t) is the vehicle motion state variable, including the vertical displacement of the car body ...

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Abstract

The invention discloses a tiny fault diagnosis method for the final controlling element of a high-speed train suspension system and mainly for the final controlling element of CRH high-speed train suspension system. The tiny fault diagnosis method comprises the following steps: (1) a unified fault model is built for the failure faults easily happening to the final controlling element by aiming at the operational state of the final controlling element of the high-speed train suspension system; (2) the influence of unsmooth rails on a vehicle-rail coupling system is considered, the model of high-speed train suspension system is built by adopting a moving-pulling-moving structure; (3) as for tiny fault diagnosis problems under a closed loop controlling system, the concept of fault information full-measurement residual error is put forward, and whether a fault happen or not the magnitude of the fault are judged based on certain decision rules. According to the invention, the diagnosis method can realize real-time testing alarm and estimate fault parameters when a tiny fault happens to the suspension system, and the possibilities of misinformation and failure in report in the fault testing process of the closed loop controlling system can be lowered.

Description

technical field [0001] The invention discloses a micro-fault diagnosis method for an actuator of a suspension system of a high-speed train, in particular to a method for detecting and estimating a micro-fault of a closed-loop control system based on the full measurement residual of fault information. The invention belongs to the technical field of fault diagnosis of a suspension system of a high-speed train. Background technique [0002] The high-speed train suspension system is responsible for supporting the car body and the bogie, and also plays a role in buffering the wheel-rail force caused by track irregularities, controlling the direction of the train and ensuring the comfort of the train, so it has high reliability. Require. In 2008, my country launched CRH (China Railway High-speed) EMU trains with a speed of more than 200 kilometers per hour on the main trunk line. So far, the largest and fastest operating high-speed railway network in the world has been built. In...

Claims

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Application Information

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IPC IPC(8): G05B23/02G06F19/00G01M17/10
Inventor 吴云凯姜斌陆宁云周东华
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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