国外文献 > 1.轴承 > 2. 轴承类型与部件 > 磁悬浮轴承
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| 标 题： |
A design method of a mode control and an unbalance vibration control for five-axes active magnetic bearing systems
五轴主动磁悬浮系统模式控制与不平衡振动控制的设计方法 |
| 作 者： |
Shinya Okubo
Yukinori Nakamura
Shinji Wakui |
| 关键词： |
Active magnetic bearing [主动磁悬浮轴承]
AMB [ AMB]
Vibration control [ 振动控制]
Turbomachinery [ 涡轮机械]
Automatic balancing system [ 自动平衡系统]
ABS [ ABS]
Peak-of-gain control [ 增益峰值控制]
PGC [ PGC]
Tracking filter [ 跟踪过滤器] |
| 出版年： |
2013 |
| 期刊名： |
International Journal of Advanced Mechatronic Systems
先进机电系统国际期刊 |
| 年卷期： |
2013, vol.5, no.4 |
| 摘 要： |
Mass unbalance of magnetically levitated rotors causes deteriorations of dynamic and static characteristics. To avoid this problem, it is necessary that mode matrices (i.e., a mode selection/distribution matrices) are adjusted appropriately. This is because these matrices are set based on the rotor's centre of gravity and magnetic force coefficients of electromagnets. It takes long time to adjust the parameters of the mode matrices by trial and error. To design these parameters efficiently, we propose an adjustment method based on experimental analysis. Experimental results of step response show effectiveness of the proposed method. On the other hand, the eccentricity of the rotor causes unbalanced vibration, which is a common problem in rotating machinery. To suppress the vibration, automatic balancing system (ABS) and peak-of-gain control (PGC) are utilised. By using the ABS (the PGC), the bearing stiffness at rotational frequency is decreased (increased). In previous works, implementation methods for these have not been presented fully. Thus, in this paper, we considered the implementation of the ABS and the PGC. Moreover, practical advantages of the PGC/ABS are demonstrated by rotational tests of a turbo molecular pump.
磁悬浮转子的动不平衡会导致其动态和静态特性的恶化。为避免这一问题，必须适当调整模态矩阵（即模态选择/分布矩阵）。这是因为这些矩阵是根据转子重心以及电磁铁的磁力系数设定的。通过试错方式调整模态矩阵参数耗时较长。为了高效设计这些参数，本文提出一种基于实验分析的调整方法。阶跃响应实验结果表明该方法具有良好的有效性。另一方面，转子的偏心会导致振动不平衡，这是旋转机械中常见的问题。为抑制振动，采用自动平衡系统（ABS）和增益峰值控制（PGC）。通过使用ABS（或PGC），可降低（或提高）转速频率下的轴承刚度。此前相关研究中尚未全面介绍这些系统的实现方法。因此，本文探讨了ABS与PGC的实施方案。此外，通过涡轮分子泵的旋转试验，展示了PGC/ABS的实际优势。 |
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