A Method for Suppressing Same-frequency Vibration Force Based on Minimum Mean Squared Error Feedforward Compensation Algorithm
A technology of feedforward compensation and mean square error, which is applied in the field of technology related to the same-frequency vibration force suppression of magnetic levitation rotors, can solve the problems that the unbalanced vibration force cannot be completely eliminated, and achieve the effect of high-precision suppression
Active Publication Date: 2021-07-13
BEIHANG UNIV
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Problems solved by technology
Due to the existence of the displacement stiffness force, only the control of the same frequency current cannot completely eliminate the unbalanced vibration force
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[0055] 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.
[0056] Such as figure 1 As shown, the implementation process of a method for suppressing the same frequency vibration force of the magnetic levitation rotor based on the minimum mean square error feedforward compensation algorithm of the present invention is as follows: firstly, the dynamic model of the magnetic levitation rotor system containing the unbalance is established, and the source of the same frequency vibration force is analyzed. A metho...
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The invention relates to a same-frequency vibration force suppression method based on the minimum mean square error feed-forward compensation algorithm. First, a dynamic model of a magnetic levitation rotor system containing an unbalance is established, the unbalance characteristics of a high-speed rotor are analyzed, and its working principle is introduced. The radial X and Y two-channel displacement signals output by the rotor displacement sensor are orthogonal to each other, and the feedforward correction of the unbalance is applied to the current to adaptively compensate the residual displacement stiffness force of the maglev rotor system. The invention simultaneously introduces an algorithm to perform real-time compensation on the two channels, reduces the calculation amount, and improves the dynamic characteristics of the system. In addition, while eliminating the same-frequency current, it also offsets the adverse effects brought about by the low-pass characteristics of the power amplifier at high speeds, and can achieve high-precision suppression of the same-frequency vibration force.
Description
technical field [0001] The invention relates to the technical field of same-frequency vibration force suppression of magnetic levitation rotors, in particular to a same-frequency vibration force suppression method based on the minimum mean square error feed-forward compensation algorithm. Due to the low-pass characteristics of the power amplifier at high speed, the system has serious amplitude attenuation and phase lag, so the present invention can compensate the influence of the low-pass characteristic of the power amplifier, suppress the same-frequency vibration force in the magnetic levitation rotor system with high precision, and provide corresponding technology for the application of the magnetic levitation control torque gyro on agile mobile satellites and large space stations support. Background technique [0002] The control moment gyroscope has the advantages of large output torque and good dynamic response, and has become a key actuator for attitude control of spac...
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IPC IPC(8): G05B13/04G05D19/02
CPCG05B13/042G05D19/02
Inventor 李金磊刘刚崔培玲郑世强
Owner BEIHANG UNIV