Magnetic levitation flywheel high precision initiative vibration control system

Abstract

A magnetic levitation flywheel high-precision active vibration control system comprises a displacement sensor, a current sensor, a magnetic bearing controller and a PWM modulation and a power amplifier, wherein, the magnetic bearing controller comprises stabilization of the controller, eccentric estimation, magnetic force compensation and action of a switch. The magnetic levitation flywheel high-precision active vibration control system introduces the eccentric estimation and the magnetic force compensation on the basis of the stable control and utilizes the unbalance vibration parameters of a flywheel to carry out the compensation of the unbalance amount and the displacement negative stiffness of the flywheel within the entire rotation speed range, thus realizing the control of the unbalance vibration of the flywheel within the entire rotation speed range and allowing the flywheel to be operated around a principal axis of inertia with high precision during the whole process of speed increasing and speed reducing.

Description

technical field [0001] The invention relates to a high-precision active vibration control system of a magnetic levitation flywheel, which is used for the suppression of the unbalanced vibration of the rotor of the magnetic levitation flywheel and the high-precision control of the flywheel. Background technique [0002] The flywheel is the main actuator for attitude control of spacecraft such as satellites. The flywheel of traditional mechanical bearings is supported by ball bearings. The rigid ball bearings will directly transmit the unbalanced moment of the flywheel to the spacecraft. At the same time, the lubrication of the ball bearings will also cause viscous moments, torque disturbances, and static friction. Bearing flywheel is also the main source of disturbance force or disturbance moment in spacecraft attitude control system, which will reduce the spacecraft pointing accuracy. With the development of magnetic bearing technology, the research of magnetic levitation f...

AI Technical Summary

Problems solved by technology

However, due to the existence of displacement negative stiffness in the actual magnetic bearing system, even if no active control force is applied to the unbalanced part of the rotor, there will still be vibrations caused by large displacement negative stiffness, which makes it impossible to achieve high-precision active vibration control of the magnetic levitation flywheel

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