Magnetic suspension rotor harmonic current suppression method based on second order dual mode repetitive control

Abstract

The invention discloses a magnetic suspension rotor harmonic current suppression method based on SDMRC (second order dual mode repetitive control). Firstly, a magnetic suspension rotor dynamic model with mass unbalance and sensor harmonic waves is built. Secondly, the magnetic suspension rotor harmonic current suppression method based on SDMRC is adopted, wherein SDMRC belongs to high order RC, and frequency fluctuation robustness of a system can be effectively improved. SDMRC is of a dual mode structure, odd and even harmonic components can be independently suppressed, and response rapidity of the system can be improved. Besides, a fractional delay filter is added into the structure, and suppression precision of the system under a fixed sampling rate can be greatly improved. By the control method, slight rotation speed fluctuation robustness and the current suppression dynamic performance of the system and suppression precision of a rotor at an optional rotation speed can be improved.The harmonic components of magnetic bearing coil current in the magnetic suspension rotor can be suppressed, and the method is applicable to harmonic current suppression of the magnetic suspension rotor system with mass unbalance and the sensor harmonic waves.

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 second-order dual mode repetitive control SDMRC (Second-order Dual Mode Repetitive Control, SDMRC), which is used for magnetic levitation control The harmonic current in the torque gyro rotor system is suppressed, which provides technical support for the application of the magnetic levitation control torque gyro on the "ultra-quiet" satellite platform. 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, compared with mechanical bearings, the CMG using magnetic suspension bearings has the following four advantages: First, there is no contact and wear between the high-spee...

AI Technical Summary

Problems solved by technology

However, the existing repetitive algorithms applied to the maglev rotor control system do not consider the problem that the controller is difficult to accurately suppress the harmonic signal under the condition of frequency fluctuation and inaccurate frequency detection.

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