Harmonic current suppression method based on virtual sampling second-order repetitive control

A harmonic current and repetitive control technology, applied in the direction of rotating gyroscopes, etc., can solve the problems of weakening the suppression effect of traditional repetitive controllers, performance attenuation, and affecting the normal and stable operation of ultra-quiet satellite platforms

Active Publication Date: 2021-03-19
BEIHANG UNIV
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Problems solved by technology

However, traditional repetitive controllers are prone to performance degradation when the ratio of the disturbance signal period to the sampling period is not an integer, and when the signal frequency deviates due to rotational speed measurement errors or processor clock error drift, it is easy to weaken the suppression of traditional repetitive controllers. E

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  • Harmonic current suppression method based on virtual sampling second-order repetitive control
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  • Harmonic current suppression method based on virtual sampling second-order repetitive control

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Embodiment Construction

[0058] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0059] like figure 1 As shown, the implementation process of a harmonic current suppression method based on virtual sampling second-order repetitive control is as follows: firstly establish a magnetic suspension rotor dynamics model with mass unbalance and sensor harmonics, and then design a virtual sampling second-order repetitive control method. Controlled method for suppressing harmonic currents of magnetically levitated rotors....

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Abstract

The invention discloses a harmonic current suppression method based on virtual sampling second-order repetitive control. The method comprises the following steps: firstly, establishing a magnetic suspension rotor kinetic model containing mass imbalance and sensor harmonic waves; secondly, using virtual sampling to ensure that the ratio of a disturbance basic period to a sampling period is an integer under the condition that the physical sampling frequency is not changed, enhancing the robustness of the system through second-order repetitive control, and keeping a good suppression effect when the frequency fluctuates to a certain extent; and a novel stability analysis method is provided for solving the problem that the high-order repetitive control stability is difficult to prove. Accordingto the virtual sampling second-order repetitive controller, the robustness of the system is improved by changing the implementation mode of unit delay, the virtual sampling second-order repetitive controller is suitable for harmonic current suppression of the magnetic suspension rotor with mass imbalance and sensor harmonic waves, a novel stability analysis method is provided, and the calculatedamount is reduced to a great extent.

Description

technical field [0001] The invention relates to the technical field of harmonic current suppression of magnetic suspension rotors, in particular to a harmonic current suppression method based on virtual sampling second-order repetitive control, which is used for suppressing harmonic currents in a magnetic suspension control torque gyro rotor system. The application of control moment gyroscope on agile maneuvering satellites and large space stations provides corresponding technical support. Background technique [0002] The rotor system of the magnetic levitation control torque gyro has many advantages such as zero friction, no lubrication, high speed and long-term service, and has an active magnetic bearing, so the damping and stiffness can be adjusted. And the magnetic bearing control loop can realize the active suppression of harmonic vibration by inserting the vibration control algorithm, avoiding the problem that the vibration isolation device occupies extra space and in...

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Application Information

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IPC IPC(8): G01C19/04
CPCG01C19/04Y02E40/40
Inventor 崔培玲李衍宾刘志远李金磊杜亮吴阳
Owner BEIHANG UNIV
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