A Method for Suppressing Odd Harmonic Vibration of Magnetic Suspension Rotor Based on Hybrid Odd Repeat Controller

Abstract

The invention discloses a method for suppressing odd-order harmonic vibration of a magnetic levitation rotor based on a hybrid odd-order repetitive controller. Firstly, the dynamics model of the maglev rotor including rotor mass unbalance and sensor harmonics is established, and secondly, the odd harmonic current suppression method of the maglev rotor based on the hybrid odd repetition controller (hereinafter referred to as HORC) is adopted. The HORC is composed of a second-order endometrial structure for odd harmonic frequency suppression and a modified resonance controller (hereinafter referred to as MRSC) in parallel. HORC can improve the harmonic suppression capability of the maglev rotor system under harmonic frequency perturbation, that is, improve the system control robustness under harmonic frequency perturbation. By suppressing the odd harmonic current component generated by the magnetic bearing coil in the magnetic levitation rotor, the suppression of the odd harmonic vibration of the magnetic levitation rotor system with rotor mass imbalance and sensor harmonics is realized.

Description

technical field [0001] The present invention relates to the technical field of harmonic vibration suppression of magnetic levitation rotors, in particular to a method for suppressing odd harmonic vibrations of a magnetic levitation rotor system based on a hybrid odd repetitive controller HORC (Hybrid Odd Repetitive Controller, HORC), which is applied to a magnetic levitation rotor system Vibration suppression provides technical support for the application of maglev control moment gyro on the "ultra-quiet" satellite platform. Background technique [0002] In the Control Moment Gyroscope (CMG), the electromagnetic force of the magnetic bearing realizes the stable suspension of the rotor. Because there is no mechanical friction between the rotor and the stator, magnetic bearings have many advantages compared with mechanical bearings: first, there is no mechanical friction between the magnetic levitation rotor and the stator, and the speed of the CMG flywheel can be greatly incr...

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Problems solved by technology

However, the repetitive control algorithms applied to the maglev rotor system are all based on the condition that the fundamental frequency of the current is constant to complete the inner membrane design, and basically do not consider the structure itself is very sensitive to the change of the fundamental frequency of the current and the problem of poor dynamic performance of the control system, resulting in When the current fundamental frequency perturbs, the harmonic current suppression effect of the repetitive controller attenuates

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