Same-frequency vibration force suppression method based on minimum mean square error feed-forward compensation algorithm
A technology of feed-forward compensation and mean square error, which is applied in the technical field involving the same-frequency vibration force suppression of magnetic levitation rotors, can solve the problem that the unbalanced vibration force cannot be completely eliminated, and achieve the effect of precise suppression
Active Publication Date: 2020-09-25
BEIHANG UNIV
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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 a minimum mean square error feed-forward compensation algorithm. The method comprises the following steps: establishing a magnetic suspension rotor system kinetic model containing unbalance; analyzing the unbalance characteristic of the high-speed rotor, introducing the working principle of the high-speed rotor,and adaptively compensating for the residual displacement stiffness force of a magnetic suspension rotor system by applying the unbalance to feed-forward correction of current by utilizing the characteristic that radial X and Y channel displacement signals output by a rotor displacement sensor are orthogonal to each other. According to the method, an algorithm is introduced to compensate two channels in real time, so the operand is reduced, and the dynamic characteristics of the system are improved. Besides, adverse effects caused by the low-pass characteristic of the power amplifier at a highspeed are counteracted while the same-frequency current is eliminated, and high-precision suppression of the same-frequency vibration force can be realized.
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