Magnetic suspension rotor harmonic current suppression method based on composite friction repetitive controller

A repetitive controller and magnetic levitation rotor technology, applied in the direction of mechanical oscillation control, non-electric variable control, control/regulation system, etc., can solve the problems of harmonic current overshoot, limited convergence speed, etc., to reduce delay time, Improve the convergence speed and reduce the effect of overshoot

Active Publication Date: 2017-05-10
BEIHANG UNIV
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Problems solved by technology

The repetitive controller has the advantages of small amount of calculation, simple structure and easy implementation, but the existing repetitive controller applied to the magnetic levitation rotor system can only achieve the equivalent suppression of all order harmonic components at a specific frequency, and the harmonic The current has overshoot and the convergence speed is limited

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  • Magnetic suspension rotor harmonic current suppression method based on composite friction repetitive controller
  • Magnetic suspension rotor harmonic current suppression method based on composite friction repetitive controller
  • Magnetic suspension rotor harmonic current suppression method based on composite friction repetitive controller

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0049] Such as figure 1 As shown, the implementation process of a maglev rotor harmonic current suppression method based on compound fractional repetitive controller is: firstly establish a maglev rotor dynamics model including mass unbalance and sensor harmonics, and then design a maglev rotor based on compound fractional repetitive control Harmonic current suppression method for magnetic levitation rotor.

[0050] (1) Establish a maglev rotor dynamics model with mass unbalance and sensor harmonics

[0051] The schematic diagram of the magnetic levitation rotor system is as follows: figure 2 shown. Let the geometric center of the magnetic bearing stator be W, the geometric center of the rotor be O, and the mass center of the rotor be C, establish an inertial coordinate system WXY with W as the center, and (x, y) represent the coordinates of t...

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Abstract

The invention discloses a magnetic suspension rotor harmonic current suppression method based on a composite friction repetitive controller. Firstly, a magnetic suspension rotor dynamical model which comprises mass unbalance and sensor harmonic is established. Secondly, the composite friction repetitive controller is designed. The controller is obtained through parallelly connecting a double-mode friction repetitive controller and a phase shift notch filter. The double-mode friction repetitive controller comprises two branches, namely an odd-order harmonic suppression branch and an even-order harmonic suppression branch. The odd-order harmonic and the even-order harmonic can be suppressed in an enhanced manner through distributing the value of a control gain, and dynamic response performance is improved. A friction time delay link is replaced by a friction time delay filter, thereby improving harmonic current suppression precision. Furthermore the phase shift notch filter is introduced for performing additional suppression on fundamental frequency current, thereby reducing current overshoot and improving harmonic convergence speed. The magnetic suspension rotor harmonic current suppression method can realize harmonic current suppression in a fixed rotating speed and is suitable for magnetic suspension rotor harmonic current suppression in which mass unbalance and sensor harmonic exist.

Description

technical field [0001] The invention relates to the technical field of magnetic suspension rotor harmonic current suppression, in particular to a magnetic suspension rotor harmonic current suppression method based on a composite fractional repetitive controller, which is used to suppress the harmonic current in the magnetic suspension rotor system, and is a magnetic suspension rotor system. Provide technical support for the application on the "ultra-quiet" satellite platform. Background technique [0002] Periodic disturbances in rotating equipment are a widespread concern. The basic method of suppressing periodic disturbances is achieved through mechanical means, such as using automatic balancing machines to reduce periodic unbalanced masses, using vibration isolation devices to prevent the transmission of disturbances, etc. However, the mechanical disturbance suppression method has the disadvantages of time-consuming and high cost, especially when the dynamic model change...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D19/02
CPCG05D19/02
Inventor 崔培玲汪启睿张国玺高倩韩东
Owner BEIHANG UNIV
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