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Maglev Train-Bridge Self-excited Vibration Suppression Method Eliminating Bridge Displacement Feedback

A maglev train, displacement feedback technology, applied in electric vehicles, vehicle components, electric traction, etc., to reduce system costs, avoid self-excited vibration, and improve reliability.

Active Publication Date: 2017-04-26
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to reduce the cost of the bridge and improve the market competitiveness of the maglev system, the maglev bridge in the project is designed to be lighter and lighter, and the elasticity of the bridge is further increased. The above methods all have obvious engineering limitations.

Method used

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  • Maglev Train-Bridge Self-excited Vibration Suppression Method Eliminating Bridge Displacement Feedback
  • Maglev Train-Bridge Self-excited Vibration Suppression Method Eliminating Bridge Displacement Feedback
  • Maglev Train-Bridge Self-excited Vibration Suppression Method Eliminating Bridge Displacement Feedback

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Embodiment 1

[0051] Such as Figure 6 As shown, the present invention eliminates the maglev train-bridge self-excited vibration suppression method of bridge displacement feedback, comprising the following steps:

[0052] 1) Obtain the vibration displacement y of the electromagnet E (t);

[0053] 2) The levitation state of the maglev train is controlled by the levitation control law shown in formula (5),

[0054]

[0055] In formula (5), y E (t) is the vibration displacement of the electromagnet, is the vibration velocity of the electromagnet, is the vibration acceleration of the electromagnet, k p is the vibration displacement y of the electromagnet E (t) scale factor, k d is the vibration velocity of the electromagnet The damping coefficient of k a is the vibration acceleration of the electromagnet The feedback coefficient of , B(t) is the magnetic field strength in the levitation gap, B E (t) is the desired magnetic field density in the levitation gap, k B is the gain ...

Embodiment 2

[0068] In the present embodiment, step 2) is the same as embodiment 1, and the specific steps of step 1) are:

[0069] 1.1a) obtain the vibration acceleration a of the electromagnet by measuring the vibration acceleration sensor installed on the electromagnet E (t);

[0070] 1.2a) Calculate the vibration displacement of the electromagnet through the displacement estimator shown in formula (8)

[0071]

[0072] In formula (8), a and b are preset displacement estimator parameters, a E (s) is the vibration acceleration of the electromagnet, is the vibration displacement of the electromagnet.

[0073] In this embodiment, the displacement estimator is used to calculate the vibration displacement of the electromagnet instead of the ideal integral to calculate the vibration displacement y of the electromagnet E (s), which can effectively eliminate the adverse effects of integral saturation caused by ideal integrals. When using the displacement estimator to calculate the ...

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Abstract

The invention discloses a magnetic-levitation train-bridge self-induced vibration inhibition method removing bridge displacement feedback. Compared with a traditional suspension control law of a magnetic-levitation train, the bridge displacement feedback is removed, the vibration acceleration of an electromagnet is obtained merely through measuring of a vibration acceleration sensor, the vibration displacement of the electromagnet is calculated, and stability of a magnetic-levitation train-bridge coupling system can be achieved based on the suspension control law of the magnetic-levitation train. The occurrence of self-induced vibration is avoided, the capability of passing through a bridge of the magnetic-levitation train at a low speed is improved, the system cost is reduced, and the system reliability is improved.

Description

technical field [0001] The invention relates to the field of levitation control of maglev trains, in particular to a maglev train-bridge self-excited vibration suppression method that eliminates bridge displacement feedback. Background technique [0002] Electro Magnetic Suspension (EMS for short) low-speed maglev train is a new type of vehicle that relies on the attraction between the electromagnet installed on the train and the track to make the train suspend on the track. The advantages of comfort and pollution-free have won more and more attention. In recent years, the maglev system has developed rapidly all over the world. However, when the maglev train passes the bridge at a low speed, the problem of maglev train-bridge coupling self-excited vibration may occur. When the coupled self-excited vibration occurs, the bridge, electromagnet and car body will vibrate vertically with a large amplitude. The vertical vibration of the bridge will have a large impact on the brid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L13/06
Inventor 李杰李金辉周丹峰崔鹏余佩昌王连春
Owner NAT UNIV OF DEFENSE TECH
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