基于轴向力自由控制的磁悬浮飞轮基座振动抑制

发布时间：2018-03-09 08:24

  本文选题：磁悬浮飞轮　切入点：形位误差　出处：《清华大学学报(自然科学版)》2017年09期 　论文类型：期刊论文

【摘要】：高速磁悬浮飞轮壳体或机座振动是影响运行精度的关键问题。对于外转子式飞轮结构,当转子轴向基准面与转子旋转轴线之间的垂直度精度在一定范围内时,这种形位误差会导致额外的基座振动。基座的同频振动幅值由转子自身的残余不平衡和位移传感器测量面的形位误差同时决定。因此,该文在传统力自由控制基础上提出了轴向力自由控制方法对基座的轴向振动进行抑制。通过实验比较了不开启不平衡控制、仅开启径向不平衡控制和同时开启径向、轴向不平衡控制3种情况,验证了在转子各自由度同时开启不平衡控制能更有效地减小基座振动。实验结果表明:在工作转速下,该方法能有效地消除转子轴向的同频振动力,抑制基座振动。同时,也证明了在承担重力方向同样也能实现力自由控制,与磁轴承仅有径向力自由的不平衡控制方法相比,拓宽了不平衡力自由控制方法的应用领域,取得了较好的振动控制效果。
[Abstract]:The vibration of a high-speed maglev flywheel shell or frame is a key problem affecting the operating accuracy. For an outer-rotor flywheel structure, when the perpendicularity between the rotor axial datum and the rotor rotation axis line is within a certain range, The same frequency vibration amplitude of the base is determined simultaneously by the residual unbalance of the rotor itself and the shape and position error of the measuring surface of the displacement sensor. In this paper, based on the traditional force free control, an axial force free control method is proposed to suppress the axial vibration of the base. The unopened unbalanced control is compared by experiments, only the radial unbalance control is opened and the radial unbalance control is opened at the same time. Three cases of axial unbalance control have been proved to be more effective in reducing the vibration of the base at the same time of opening the unbalance control at various degrees of freedom of the rotor. The experimental results show that the method can effectively eliminate the axial vibration force of the rotor at the working speed. At the same time, it is proved that force free control can also be realized in bearing the direction of gravity. Compared with the unbalanced control method of magnetic bearing with only radial force freedom, the application field of unbalance force free control method is widened. Better vibration control effect has been achieved.
【作者单位】： 清华大学核能与新能源技术研究院;清华大学工程物理系;
【基金】：国家科技重大专项(ZX069)
【分类号】：TH133.7
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本文编号：1587750