System and method for suppressing vibration of rotor in magnetic suspension bearing system

Abstract

The invention belongs to the technical field of magnetic suspension bearings, and particularly relates to a rotor vibration suppression system and method in a magnetic suspension bearing system. When a rotor is subjected to an interference force, a rotor disturbance compensation observer sends a rotor vibration suppression compensation control signal after receiving a rotor vibration displacement signal and a rotor vibration acceleration signal; the control current is adjusted through a power amplifier, and electromagnetic force is provided; when the base is subjected to interference force, the base acceleration feed-forward compensator receives a base vibration acceleration signal and then sends a base acceleration feed-forward compensation signal, and then the position controller provides reference displacement; when the magnetic suspension bearing system is out of control, a position error control channel is cut off, a rotor vibration suppression control signal after instability is added, and full-gap vortex motion of the rotor in a protection bearing is suppressed; meanwhile, the rotor disturbance compensation observer sends a rotor vibration suppression compensation control signal, the control current of the magnetic suspension bearing is adjusted through the power amplifier, and electromagnetic force is provided.

Description

technical field [0001] The invention belongs to the technical field of magnetic suspension bearings, and in particular relates to a rotor vibration suppression system and method in a magnetic suspension bearing system. Background technique [0002] Magnetic suspension bearings are a new type of bearings that use electromagnetic force to achieve non-contact, and are often used in applications with high rotor speeds. At present, the magnetic suspension bearing control system basically adopts the control strategy based on the rotor position error, that is, the real-time vibration displacement of the rotor is detected by the displacement sensor, and the displacement error is obtained by comparing with the reference displacement, and then generated by the controller, the power amplifier, and the magnetic suspension bearing stator. Corresponding electromagnetic force to eliminate the displacement error. [0003] In the current control strategy, when the high-speed rotating rotor ...

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Problems solved by technology

In the prior art, the research on the vibration suppression of the rotor caused by the disturbance force in the magnetic suspension bearing system has a large error in the compensation force observed only based on the displacement signal (it is greatly affected by the sampling frequency and the signal-to-noise ratio), and it is difficult to realize the random Accurate real-time compensation of disturbance force; for the study of system instability and resuspension caused by disturbance force, due to the large error in the analysis based on rotor displacement, the magnetic suspension bearing cannot provide appropriate active suppression force in time, and cannot quickly reduce the impact and impact of the rotor. Vibration, it is difficult to quickly realize the resuspension of the magnetic suspension bearing system

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