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Method for restraining magnetic levitation rotor harmonic current by connecting harmonic oscillator and fractional order repetitive controller in parallel

A technology of repetitive controller and harmonic oscillator, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as inability to compensate for fractional parts, achieve fast and accurate current suppression, simplify system structure, The effect of increasing the convergence speed

Active Publication Date: 2018-06-29
BEIHANG UNIV
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Problems solved by technology

However, the traditional repetitive control algorithm can only suppress the current for a specific rotor speed. Once the ratio of the sampling frequency to the fundamental frequency of the harmonic interference signal is not an integer, the fractional part cannot be compensated, that is, it cannot be achieved at any rated frequency. Accurate suppression of harmonic disturbance signals

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  • Method for restraining magnetic levitation rotor harmonic current by connecting harmonic oscillator and fractional order repetitive controller in parallel
  • Method for restraining magnetic levitation rotor harmonic current by connecting harmonic oscillator and fractional order repetitive controller in parallel
  • Method for restraining magnetic levitation rotor harmonic current by connecting harmonic oscillator and fractional order repetitive controller in parallel

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0041] Such as figure 1 As shown, the implementation process of a magnetic levitation rotor harmonic current suppression method for a harmonic oscillator parallel fractional repetitive controller is: firstly establish a magnetic levitation rotor dynamics model including mass unbalance and sensor harmonics, and then design a harmonic Harmonic current suppression method for magnetic levitation rotor with wave oscillator parallel fractional repetitive controller.

[0042] The maglev rotor system consists of a displacement sensor K s , controller G c (s), power amplifier G w (s) and maglev rotor G p (s) composition, the displacement sensor measures the rotor displacement and feeds it back to the controller, the controller outputs the control quantity to the power amplifier, the power amplifier outputs current to the magnetic bearing coil, and the ...

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Abstract

The invention discloses a method for restraining a magnetic levitation rotor harmonic current by connecting a harmonic oscillator and a fractional order repetitive controller in parallel. The method comprises the following steps: firstly, building a magnetic levitation rotor system dynamic model including imbalance mass and a sensor harmonic wave; secondly, shifting a low-pass filter Q(s) from a feedback circuit of a repetitive controller to a branch circuit which is in series connection with the repetitive controller due to the lowering of disturbance restraining performance of the system since the low-pass filter Q(s) has an amplitude value attenuation and phase lag in high-frequency section, thirdly, substituting a fractional delay filter for a fractional compensation loop, increasing the convergence speed of restraining the harmonic current by connecting the harmonic oscillator in parallel. By adopting the method, accurate restraining for the harmonic current can be realized for amagnetic levitation flywheel or a magnetic levitation gyroscope at any rated rotation speed, high current restraining-converging speed can be kept, the method is applied to harmonic current restraining of the magnetic levitation rotor having the imbalance mass and the 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 of a harmonic oscillator parallel fractional order repetitive controller, which is used for the harmonic current suppression of a magnetic levitation gyro or a magnetic levitation flywheel, so that Provide technical support for the magnetic levitation flywheel or maglev gyro in the "ultra-quiet" vibration level on the satellite platform. Background technique [0002] The magnetic levitation rotor is supported by magnetic bearings. Because the magnetic bearing rotor system has the advantages of long life, no friction, and active vibration control, it is suitable for various high-speed rotating equipment and has great potential in the fields of aerospace, aviation, nuclear industry, and mechanical engineering. It has wide application prospects, especially in magnet...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/045
Inventor 崔培玲高倩张国玺韩东
Owner BEIHANG UNIV
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