Magnetic suspension rotor harmonic current suppression method based on frequency self-adaptive fractional compensation repetition controller

A repetitive controller, frequency adaptive technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of inability to compensate for fractional parts, inability to achieve accurate suppression, etc., to eliminate amplitude attenuation and The effect of phase lag

Inactive Publication Date: 2017-05-31
BEIHANG UNIV
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Problems solved by technology

like Figure 4 The repetitive control algorithm shown 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 Precise suppression of harmonic disturbance signals at nominal frequency

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  • Magnetic suspension rotor harmonic current suppression method based on frequency self-adaptive fractional compensation repetition controller
  • Magnetic suspension rotor harmonic current suppression method based on frequency self-adaptive fractional compensation repetition controller
  • Magnetic suspension rotor harmonic current suppression method based on frequency self-adaptive fractional compensation repetition controller

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0048] Such as figure 1 As shown, the implementation process of a magnetic levitation rotor harmonic current suppression method based on a frequency adaptive fractional compensation repetitive controller is: firstly establish a magnetic levitation rotor dynamics model including mass unbalance and sensor harmonics, and then design a magnetic levitation rotor based on Frequency Adaptive Fractional Compensation Repetitive Controller for Harmonic Current Suppression of Magnetic Levitation Rotors.

[0049] 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 t...

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Abstract

The invention discloses a magnetic suspension rotor harmonic current suppression method based on a frequency self-adaptive fractional compensation repetition controller. The method comprises the steps that a magnetic suspension rotor dynamic model with unbalanced mass and sensor harmonics is established; after high-band signal amplitude attenuation and phase lag, which are caused by a low-pass filter Q (s), are considered, the disturbance suppression ability of a system is reduced; the low-pass filter Q (s) is moved to the branch of the repetition controller from the inside feedback loop; a fractional order compensation link is replaced by a fractional delay filter; and through online updating of the coefficients of the fractional delay filter, precise harmonic current suspension at any frequency can be realized. According to the invention, precise harmonic current suspension of a magnetic suspension flywheel or a magnetic suspension gyroscope at any rated speed can be realized, and the method is suitable for current suppression of magnetic suspension rotor harmonics with mass imbalance and sensor harmonics.

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 the combination of integer delay and fractional order repetitive controller, which is used for the harmonic current suppression of magnetic levitation gyroscope or magnetic levitation flywheel , to provide technical support for the application of maglev flywheels or gyroscopes on "ultra-quiet" satellite platforms. 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 magnetic levitation f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04H02N15/00
CPCG05B13/042H02N15/00
Inventor 崔培玲高倩汪启睿张国玺韩东
Owner BEIHANG UNIV
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