Magnetic suspension rotor vibration harmonic suppression method and system with multiple wave traps connected in parallel

Abstract

The invention discloses a magnetic suspension rotor vibration harmonic suppression method and a magnetic suspension rotor vibration harmonic suppression system with multiple wave traps connected in parallel. The magnetic suspension rotor vibration harmonic suppression system comprises parallel phase-shift wave traps, a magnetic suspension controller and a magnetic bearing rotor which are connectedin sequence, wherein signal extraction points of the parallel phase-shift wave traps are placed at an input end of the magnetic suspension controller, and signal insertion points of the parallel phase-shift wave traps are placed at a position of a displacement error signal. The magnetic suspension rotor vibration harmonic suppression method and the magnetic suspension rotor vibration harmonic suppression system aim at the magnetic suspension rotor, considers the influence of rotor mass unbalance and sensor vibration, establish a magnetic suspension rotor dynamical model containing harmonic disturbance, effectively suppress different frequency disturbance components of a harmonic current under variable rotating speed frequency by connecting a plurality of differently phase-shifted wave traps in parallel, further effectively suppress the harmonic vibration while ensuring closed-loop stability of the system, and are of reference significance to the harmonic suppression problem under themagnetic suspension-rotor system under variable speed situation.

Description

technical field [0001] The invention relates to a magnetic levitation rotor control system with multiple traps in different phases connected in parallel, so as to obtain superior harmonic current suppression effect in the full speed range, thereby effectively suppressing harmonic vibration. The invention belongs to the field of harmonic vibration suppression of a magnetic suspension-rotor system. Background technique [0002] Due to the advantages of non-contact, low power consumption and long life, the maglev flywheel rotor has become a hot spot in the study of satellite stability. In order to obtain ultra-high-precision satellite attitude control performance, it is very necessary to reduce the unnecessary vibration force of the maglev rotor as much as possible. Unwanted vibratory forces in electromagnetic bearing-rotor systems are mainly caused by harmonic currents, which are a common problem in magnetic levitation rotor systems and pose a potential threat to system stabi...

AI Technical Summary

Problems solved by technology

Multi-notch filters are usually used to suppress harmonic currents. However, multi-notch filters have the same structure and parameters, and closed-loop stability cannot be guaranteed in the entire speed range.

Since different harmonics cross over a wide speed range, when a notch filter is inserted into the baseline system, it inevitably affects the closed-loop stability

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