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Harmonic current suppression method based on 1.5-order hybrid repetitive controller

A repetitive controller, harmonic current technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problem of reducing the robustness of the system, affecting the dynamic response speed, affecting the gain and phase of the repetitive controller, etc. problem, to achieve the effect of fast and effective suppression of harmonic current and improved response speed

Active Publication Date: 2020-10-09
BEIHANG UNIV
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Problems solved by technology

But for the magnetic levitation rotor system, because the disturbance frequency brought by the noise of the displacement sensor is generally an odd multiple of the rotational frequency, and does not contain all harmonics, it is unnecessary to generate high gain at certain frequencies, and it is necessary to reduce the frequency of the system. Robustness also affects dynamic response speed
In the actual debugging, there is a small deviation between the rotational frequency and the actual value due to the fluctuation of the motor rotational frequency or the low precision of the rotational speed measurement sensor. This deviation will affect the gain and phase generated by the repeating controller at the actual rotational frequency

Method used

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Embodiment Construction

[0051] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0052] Such as figure 1 As shown, the implementation process of a harmonic current suppression method based on a 1.5-order hybrid repetitive controller is: firstly establish a magnetic levitation rotor dynamics model including unbalanced quantities and sensor harmonic disturbances, and then design a 1.5-order hybrid repetitive controller based on Harmonic current suppression method of the device.

[0053] (1) Establish a maglev rotor dynamics mode...

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Abstract

The invention discloses a harmonic current suppression method based on a 1.5-order hybrid repetitive controller, and the method comprises the steps: firstly building a magnetic suspension rotor kinetic model containing unbalance and sensor harmonic disturbance, and proposing a structure with three compensation channels connected in parallel by combining with fractional order repetitive control; according to the invention, odd harmonics and even harmonics can be independently eliminated by controlling a gain factor, only 0.5 N sampling periods are needed, the system delay is reduced, the dynamic response of the system is accelerated, the anti-interference performance of an algorithm is improved, and the suppression of the harmonic current of the system can be effectively realized.

Description

technical field [0001] The invention relates to the technical field of magnetic suspension rotor harmonic current suppression, in particular to a harmonic current suppression method based on a 1.5-order hybrid repetitive controller, which is used to suppress the harmonic current in the magnetic suspension control moment gyro rotor system, and is a magnetic suspension The application of control torque on high-resolution earth observation satellites and agile maneuvering satellites provides corresponding technical reserves. Background technique [0002] Magnetic levitation technology has received more and more attention due to its advantages such as no friction, long life, and no need for lubrication. Compared with traditional mechanical bearings, the magnetic levitation rotor system is supported by magnetic levitation bearings, whose stiffness and damping are controllable, and can be used in inertial actuators for agile maneuvering and stability control of spacecraft. [000...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 李金磊刘刚崔培玲郑世强
Owner BEIHANG UNIV
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