Magnetic suspension rotor direct vibration force suppression method based on dual-channel harmonic reconstruction

Abstract

The invention discloses a magnetic suspension rotor direct vibration force suppression method based on dual-channel harmonic reconstruction, which comprises the following steps: firstly, establishing a magnetic suspension rotor dynamic model containing mass imbalance and sensor harmonic, and then, adopting a magnetic suspension rotor direct vibration force suppression method based on a DCHR controller. Wherein the DCHR can quickly and accurately estimate and suppress the vibration force of the system. Meanwhile, the DCHR uses the vibration force as the same-frequency input compensation displacement stiffness force, the harmonic detection performance is improved through double-frequency amplitude compensation, and the stability of the system within the full rotating speed range is guaranteed through a compensation phase angle. The DCHR controller is simple in structure, small in hardware calculation burden, capable of effectively restraining the harmonic vibration force in the magnetic suspension rotor and suitable for restraining the vibration force of a magnetic suspension rotor system containing mass imbalance and sensor harmonic waves.

Description

technical field [0001] The present invention relates to the technical field of harmonic vibration suppression of magnetic levitation rotors, in particular to a method for direct vibration force suppression of magnetic levitation rotors based on DCHR (Dual Channel Harmonic Reconstruction, DCHR), which is used to control the torque of magnetic levitation gyro rotors The multi-harmonic vibration force in the system is suppressed, so as to achieve the purpose of suppressing the harmonic vibration of the rotor at high speed, and provide technical support for the application of the "ultra-precision and ultra-stable" satellite platform. Background technique [0002] Inertial actuators are divided into two categories: inertial momentum wheels and control moment gyroscopes (Control MomentGyroscope, CMG). The control moment gyroscope has the advantages of large torque magnification, excellent dynamic performance and high output torque accuracy, and is the key executive component in th...

AI Technical Summary

Problems solved by technology

Most of the existing technologies focus on attenuating the same-frequency and double-frequency currents. Traditional methods mainly include filters, repetitive control, adaptive control, disturbance observers, and synchronous rotation coordinate transformation methods. However, due to the existence of displacement stiffness forces , the suppression of the current cannot completely eliminate the vibration, so the direct suppression of the same frequency and double frequency vibration force is a problem that needs to be solved

The traditional method of synchronous rotating coordinates requires two coordinate matrix transformations, and the hardware calculation burden is heavy. At the same time, it only relies on a low-pass filter with a lower cut-off frequency to filter out interference items, and the dynamic characteristics deteriorate.

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