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针对磁悬浮飞轮不平衡质量导致转子在高速旋转时径向振幅较大的缺点,提出了一种前馈抑制方法。建立了磁轴承转子动力学模型,基于达朗伯原理,分别得到了不平衡质量矩引起的动约束力和转子惯性轴偏离几何轴引起的离心力。仿真结果表明:转子两端的不平衡质量大小相等,转速为5000r/min时,飞轮转子采用前馈抑制方法后,转子径向振幅从12μm减小至2μm,减小约83%。实验结果与仿真结果一致,验证了前馈抑制方法可大幅度提高飞轮系统的稳定性。
Aimed at the disadvantage that the unbalanced mass of the magnetic levitation flywheel leads to the large radial amplitude of the rotor rotating at high speed, a feedforward suppression method is proposed. The dynamic model of the rotor of a magnetic bearing was established. Based on the principle of Darumber, the dynamic binding force caused by the unbalanced mass moment and the centrifugal force caused by the deviation of the rotor inertia axis from the geometric axis were obtained respectively. The simulation results show that the unbalanced mass at both ends of the rotor is of equal magnitude. When the rotor speed is 5000r / min, the rotor radial amplitude is reduced from 12μm to 2μm by about 83% after the feedforward suppression method is adopted. The experimental results are consistent with the simulation results. It is verified that the feedforward suppression method can greatly improve the stability of the flywheel system.