Unbalance vibration feedforward restraint and experiments for a magnetic bearing spherical flywheel

被引：0
|
作者：
Liu Q. [1 ]
Yin Z. [1 ]
Wu B. [1 ]
Ren Y. [2 ]
Xin C. [2 ]
Fan Y. [3 ]
机构：
[1] Institute of Precision Electromagnetic Equipment and Advanced Measurement Technology, Beijing Institute of Petrochemical Technology, Beijing
[2] Department of Space Equipment, Aerospace Engineering University, Beijing
[3] Beijing Institute of Control Engineering, Beijing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2019年 / 38卷 / 10期
关键词：
Feedforward; Magnetic bearing; Magnetic bearing spherical flywheel; Simulation; Unbalance vibration;
D O I：
10.13465/j.cnki.jvs.2019.10.014
中图分类号：
学科分类号：
摘要：
Aiming at the unbalance vibration of a magnetic bearing spherical flywheel rotor, an unbalance vibration feedforward restraint method was presented by establishing the dynamic model of its spherical rotor-magnetic bearing. Based on the D'Alembert's principle, the unbalance mass moments was equivalent to two counterweights on the end planes of rotor, and the dynamic reaction of the magnetic bearing was obtained. To keep the shell gap its spherical configuration between stator and rotor and relieve the negative magnetic deflection moment induced by non-uniform magnetic field, the sphere centers of the rotor was made always coinciding with that of the stator. The centrifugal force caused by the deviation between the rotor mass center and spin axis was analysed. Considerning the electromagnetic levitation force always pointing to the sphere center, the caused negative moment was also calculated when the rotor mass center deviates from the rotor sphere center. When the two unbalance mass moments with phase difference of π were identical, the feedforward restraint simulations were implemented at the speed of 8 000 r/min. The results show that the rotor's radial and axial amplitudes decrease from 13.8 μm and 21.6 μm to 3.3 μm and 5.6 μm, which are reduced by 76.1% and 74.1%, respectively. The tests results have a good agreement with those of the simulations, which indicates the dynamic model is correct and feedforward restraint method is effective. © 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：92 / 97and123
相关论文
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