Magnetic suspension rotor harmonic current suppression method based on parallel phase shift filter

Abstract

The invention discloses a magnetic suspension rotor harmonic current suppression method based on a parallel phase shift filter. For a magnetic suspension control moment gyro, the method includes that at first, a magnetic suspension rotordynamics model including mass unbalance and sensor harmonic wave is established, the harmonic current suppression method based on the parallel phase shift filter is designed, and different phase shifts are selected based on different rotating speed, so that the system stability is guaranteed. The method can suppress the harmonic component of the magnetic bearing coil current in a magnetic suspension rotor, and is suitable for the harmonic current suppression of a magnetic suspension rotor system including mass unbalance and sensor harmonic wave.

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 a parallel phase shift filter, which is used to suppress the harmonic current in the magnetic levitation control torque gyro rotor system, for Provide technical support for the application of magnetic levitation control moment gyro on the "ultra-quiet" satellite platform. Background technique [0002] With the continuous deepening of my country's aerospace industry, the requirements for pointing accuracy and stability of satellite platforms are getting higher and higher. The magnetic levitation control moment gyro is supported by magnetic bearings, which has the advantages of no friction, long life, and controllable active vibration. It is one of the ideal actuators for realizing "ultra-quiet" satellite platforms. [0003] According to the number of act...

AI Technical Summary

Problems solved by technology

For the vibration suppression of multiple frequencies, a multi-frequency notch filter can be used. Considering the influence of the speed on the frequency multiplication compensation accuracy, the adaptive gradient algorithm is used to identify each frequency, and the high-precision compensation of the rotor frequency multiplication component is realized. However, The impact of the notch filter on system stability is not considered, and this method needs to adjust the value of the coefficient according to different frequencies

The existing wave trap technology has the following disadvantages: (1) The use of wave traps to suppress harmonic currents is only suitable for higher speeds, and the introduction of wave traps cannot guarantee the stability of the system at different speeds

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