A Harmonic Current Suppression Method for Magnetically Suspended Rotors Based on Parallel FORC and Phase Lag-Lead Compensation

Abstract

The invention discloses a magnetic suspension rotor harmonic current inhibition method based on parallel FORC and phase lag-lead compensation, and the method comprises the steps: firstly building a magnetic suspension rotor dynamical model comprising quality imbalance and sensor harmonic; secondly employing a magnetic suspension rotor harmonic current inhibition method based on a parallel FORC structure. The structure enables internal models of a harmonic at all frequencies to be converted into a plurality of parallel units with the similar structures, and quickly improves the dynamic performances of a system. The method also employs the phase lag-lead compensation to improve the stability and dynamic performances of the system. The invention proposes a method for quickly and adaptively adjusting the controller gain for a specific harmonic signal. The method achieves the dynamic optimization of the dynamic performances and stability. The method achieves the inhibition of a harmonic component of a current of a magnetic bearing coil in a magnetic suspension rotor, and is suitable for the harmonic current inhibition of the magnetic suspension rotor system with the quality imbalance and sensor harmonic.

Description

technical field [0001] The present invention relates to the technical field of magnetic levitation rotor harmonic current suppression, in particular to a magnetic levitation rotor harmonic current suppression method based on parallel FORC (Fractional Order Repetitive Control, FORC) and phase lag-lead compensation, which is used to control the magnetic levitation torque gyroscope Harmonic currents in the rotor system are suppressed to provide technical support for the application of magnetic levitation control moment gyroscopes on "ultra-quiet" satellite platforms. Background technique [0002] The magnetic bearing in the control moment gyroscope CMG (Control Moment Gyroscope, CMG) uses electromagnetic force to levitate the rotor. Because there is no contact between the bearing rotor and the stator, it has the following three advantages compared with mechanical bearings: first, the speed of the CMG flywheel can be greatly increased, the size and mass of the rotor with the sam...

AI Technical Summary

Problems solved by technology

Existing technologies are mainly aimed at suppressing single-frequency interference, and there are relatively few studies on harmonic disturbance suppression, mainly including parallel multi-notch filters or multiple LMS filters, repetitive control RC algorithms, etc.

However, parallel multi-notch filters cannot suppress all vibrations at the same time, the amount of calculation is large, and the convergence speed between different filters needs to be considered, so the design is more complicated; while the repetitive control RC algorithm can realize the control without multiple filters in parallel. Simultaneous suppression of vibrations of different frequency components

The repetitive control RC algorithm is a method to achieve zero static error of the system based on the internal model principle, but the existing repetitive algorithms applied to the maglev rotor control system do not consider the problem of harmonic suppression in specific frequency bands and the dynamic response performance of the system.

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