Magnetic-levitation train-bridge self-induced vibration restraining method introducing bridge vibration speed

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] Electromagnetic 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. Advantages such as no pollution 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 structure, which w...

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

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