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Magnetic suspension rotor harmonic current suppression method based on FIR filter and fractional-order repetitive controller

A technology of magnetic suspension rotor and repetitive controller, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of harmonic current suppression, lack of frequency adaptive ability, etc., and achieve the effect of harmonic current suppression

Active Publication Date: 2017-02-22
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

The existing repetitive control algorithms applied to the magnetic levitation rotor control system have no frequency self-adaptive ability, and can only achieve harmonic current suppression at certain fixed speeds. The present invention proposes a frequency self-adaptive repetitive controller to realize the magnetic levitation rotor Harmonic current suppression

Method used

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  • Magnetic suspension rotor harmonic current suppression method based on FIR filter and fractional-order repetitive controller
  • Magnetic suspension rotor harmonic current suppression method based on FIR filter and fractional-order repetitive controller
  • Magnetic suspension rotor harmonic current suppression method based on FIR filter and fractional-order repetitive controller

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0044] like figure 1 As shown, the implementation process of a magnetic levitation rotor harmonic current suppression method based on FIR filter and fractional repetitive controller is: first establish a magnetic levitation rotor dynamics model including mass unbalance and sensor harmonics, and then design a magnetic levitation rotor based on Harmonic current suppression method for magnetically levitated rotors with FIR filter and fractional repetitive controller.

[0045] (1) Establish a maglev rotor dynamics model with mass unbalance and sensor harmonics

[0046] Schematic diagram of the structure of the magnetic levitation rotor system. figure 2 As shown, O represents the geometric center of the magnetic bearing stator, G represents the geometric center of the rotor, and I represents the mass center of the rotor. The inertial coordinate ...

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Abstract

The invention discloses a magnetic suspension rotor harmonic current suppression method based on an FIR filter and a fractional-order repetitive controller. The method comprises the steps: firstly, a magnetic suspension rotor dynamic model containing mass unbalance and sensor harmonic wave is established; then, the FIR filter is a low-pass filter with the linear phase characteristic, and the fractional-order repetitive controller can be obtained through approximation of a fractional delay filter. The method provided by the invention can achieve harmonic current suppression in a constant rotation speed through online updating of the fractional delay filter and is suitable for harmonic current suppression of a magnetic suspension rotor with mass unbalance and sensor harmonic wave; the FIR low-pass filter and the fractional-order repetitive controller are combined and used, and the harmonic current suppression can be achieved through the linear phase characteristic of the FIR filter and the online updating of the fractional-order repetitive controller.

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 FIR filter and fractional-order repetitive controller, which is used to suppress the harmonic current in the magnetic levitation flywheel rotor system , to provide technical support for the application of maglev flywheels on "ultra-quiet" satellite platforms. Background technique [0002] The magnetic bearing rotor system has the characteristics of no friction, long life and controllable active vibration, and has good applications in magnetic levitation flywheels, magnetic levitation gyroscopes, and magnetic levitation molecular pumps. Due to the limited machining accuracy, the mass imbalance of the magnetic levitation rotor will inevitably exist, and the same frequency control current as the speed frequency will be generated during high-speed rotation; ...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 崔培玲李胜汪启睿高倩
Owner BEIHANG UNIV
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