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Maglev Train Introducing Bridge Vibration Velocity—Bridge Self-excited Vibration Suppression Method

A vibration speed, maglev train technology, applied in sliding/floating railway systems, motor vehicles, electric vehicles, etc., to achieve the effect of increasing electrical damping, reducing system cost, and improving capacity

Active Publication Date: 2017-06-06
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is: aiming at the technical problems existing in the prior art, the present invention provides a bridge modal damping that cannot be changed in the existing engineering environment without increasing the system cost. A maglev train-bridge self-excited vibration suppression method that introduces the bridge vibration velocity to realize the stability of the maglev train-bridge coupling system

Method used

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  • Maglev Train Introducing Bridge Vibration Velocity—Bridge Self-excited Vibration Suppression Method
  • Maglev Train Introducing Bridge Vibration Velocity—Bridge Self-excited Vibration Suppression Method
  • Maglev Train Introducing Bridge Vibration Velocity—Bridge Self-excited Vibration Suppression Method

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Embodiment Construction

[0051] The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0052] like Figure 7 Shown, the present invention introduces the maglev train of bridge vibration speed-bridge self-excited vibration suppressing method, comprises the steps:

[0053] 1) Obtain the vibration velocity of the bridge

[0054] 2) The suspension control system adopts the suspension control law shown in formula (2) to control the suspension state of the maglev train,

[0055]

[0056] In formula (2), δ(t) is the suspension gap of the electromagnet relative to the bridge, is the vibration velocity of the electromagnet, is the vibration velocity of the bridge, is the vibration acceleration of the electromagnet, k p is the proportional coefficient of the suspension gap δ(t) of the electromagnet relative to the bridge, k d is the vibration ...

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Abstract

The invention discloses a magnetic-levitation train-bridge self-induced vibration restraining method introducing bridge vibration speed. Bridge vibration speed feedback is introduced into a levitation control law based on state feedback of a magnetic flux inner ring, electrical damping of a bridge is increased, by the utilization of measurement data of vibration acceleration sensors and electrical vortex sensors on electromagnets, integration is performed on vibration accelerations of the electromagnets through an automatic return-to-zero integrator to obtain vibration speeds of the electromagnets, differential calculation is performed on levitation gaps, relative to the bridge, of the electromagnets to obtain vibration speeds, relative to the bridge, of the electromagnets, an estimation value of the bridge vibration speed is obtained through calculation, and then the levitation control law is utilized for controlling the levitation state of a magnetic-levitation train. In an existing engineering environment, on the basis that the system cost is not increased, a magnetic-levitation train-bridge coupling system is stable, self-induced vibration is avoided, and the ability of a middle-low speed magnetic-levitation train passing through the bridge at low speed 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 by introducing bridge vibration speed. 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 bridge stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61B13/08B60L13/04
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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