Unbalance identification and vibration suppression control system for magnetic suspension rotating machinery

Abstract

An unbalance identification and vibration suppression control system for a magnetic suspension rotating machinery comprises an unbalance identification module, an unbalanced force compensation module, a magnetic bearing power amplifier, an electromagnet rotor and a displacement sensor. Based on stable control of a magnetic suspension rotor, the unbalance of a magnetic bearing is identified in an online manner by a novel wave trap based on coordinate transformation, on one hand, the identification amount is used for compensating common-frequency current stiffness force, on the other hand, proper common-frequency current stiffness force is generated according to the identification amount to compensate common-frequency displacement stiffness force, and the influence of the low-pass characteristic of the power amplifier on compensation precision of the common-frequency displacement stiffness force is eliminated by leading a simplified inverse model of the magnetic bearing power amplifier into a feed-forward channel. When the magnetic suspension rotor rotates at a high speed, common-frequency bearing force is greatly reduced, and unbalanced vibration of the magnetic suspension rotor is remarkably suppressed. The unbalance identification and vibration suppression control system is simple, convenient, easy and particularly suitable for an actual high-speed magnetic suspension rotor system.

Description

technical field [0001] The invention relates to an unbalance identification and vibration suppression control system of a magnetic levitation rotating machine, which can be used for high-precision automatic balancing of a magnetic levitation rotor, and is especially suitable for elongated rotors such as magnetic levitation high-speed motors. Background technique [0002] Magnetic suspension bearing is a new type of high-performance bearing. It uses a controllable electromagnetic field to stably suspend the rotor at a given position. It has the advantages of no contact, no friction, no lubrication, high precision, long life and active controllable damping stiffness. It is a rotor system. The ideal support method has been widely used in the fields of industry, military and aerospace. [0003] Due to the machining accuracy, it is impossible to make the mass distribution of the rotor geometrically uniform, resulting in misalignment of the geometric axis and the inertial axis. T...

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is: to overcome the defects of the existing high-speed maglev rotor unbalanced vibration suppression method, to provide a new type of trap based on coordinate transformation to identify the same-frequency component in the displacement online in real time, in the feedforward compensation channel Introduce the simplified inverse model of the magnetic bearing power amplifier to eliminate the influence of the low-pass characteristic of the magnetic bearing power amplifier on the compensation accuracy of the displacement stiffness force, and realize the unbalanced vibration suppression of the high-speed magnetic levitation rotor

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