Harmonic Current Suppression Method of Magnetic Bearing System Based on Parallel Finite-Dimensional Repetitive Control
A harmonic current and repetitive control technology, applied in general control systems, control/regulation systems, adaptive control, etc., can solve problems such as the decline of high-frequency vibration suppression ability
Active Publication Date: 2020-11-10
HUACHI KINETIC ENERGY (BEIJING) TECH CO LTD
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As the rotor speed increases, the algorithm's ability to suppress high-frequency vibration decreases
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[0074] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0075] like figure 1 As shown, the present invention is a magnetic bearing multi-harmonic suppression method based on finite dimensional repeat control, and its implementation process is: first establish two free-degree magnetic bearing systems including rotor imbalance and displacement sensor harmonic noise noise noise noise Dynamics model; then based on parallel FDRC design of magnetic shaft harmonic current suppression algorithm; The specific implementation steps of the present invention are as follows:
[0076] (1) Two freelance magnetic bearing rotor kinetic models containing rotor imbalance and displacement sensor harmonic noise
[0077] For two free-degree magnetic bearing systems, the X-axis and Y-axis two channels are decoupled, and it is assumed that the displacement rigidity coefficient of the X-axis and the Y-axis and the current stiffnes...
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The invention discloses a two-degree-of-freedom magnetic bearing system harmonic current suppression method based on parallel finite dimensional repetitive control (FDRC). The method comprises the following steps: a two-degree-of-freedom magnetic bearing rotor dynamic model containing rotor unbalance and displacement sensor harmonic noise is firstly built; with a power amplifier system as a controlled object and coil current as a controlled variable, the parallel FDRC is used to design magnetic bearing system harmonic current suppression; and finally, parameters of the parallel FDRC controllerare designed, the system stability is analyzed, and on the premise of ensuring the stability of a closed loop system, two-degree-of-freedom magnetic bearing system harmonic current suppression is realized. The order of the FDRC can be selected rationally according to harmonic current suppression precision requirements, and influences on the suppression precision and the system stability by a lowpass filter in the traditional repetitive control can be overcome; and when the controller parameters are designed, influences on the harmonic current suppression precision by power amplifier low passcharacteristic are directly considered, and additional design of a compensation link for the power amplifier system is not needed.
Description
Technical field [0001] The present invention belongs to the field of active vibration control of the magnetic bearing system. Harmonic current suppression. Background technique [0002] With the future, high-resolution satellite observations, deep space detection, inter-star laser communication, etc., ultra-quiet super-steady and agile mobile becomes two important indicators for measuring the performance of satellite platform. The increasingly high resolution indicators are getting higher and higher in the point-to-the stability of the satellite platform, thus getting more and more sensitive to the vibration source on the star. The low-speed vibration caused by high-speed rotating inertial actuators is the main vibration source of the satellite platform, which has become the main bottleneck of "super quiet super stable" platform. The magnetic suspension inertial actuator adopts a magnetic bearing, so that the magnetic suspension rotor has no contact with high speed, and its own v...
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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 张会娟陈红梅刘楠嶓袁航钱进姚艳艳
Owner HUACHI KINETIC ENERGY (BEIJING) TECH CO LTD