• CN:11-2187/TH
  • ISSN:0577-6686

›› 2000, Vol. 36 ›› Issue (12): 62-64.

• 论文 • 上一篇    下一篇

电磁轴承最优刚度与系统结构参数关系的研究

赵雷;张德魁;杨作兴;赵鸿宾   

  1. 清华大学机械工程系机电与控制实验室
  • 发布日期:2000-12-15

STUDY ON RELATIONSHIP BETWEEN OPTIMAL STIFFNESS AND THE STRUCTURE PARAMETERS OF AMB

Zhao Lei;Zhang Dekui;Yang Zuoxing;Zhao Hongbin   

  1. Qinghua University
  • Published:2000-12-15

摘要: 电磁轴承系统中最重要的两个机电结构参数是定转子间气隙和定子静态偏置磁通密度,影响着支承刚度和承载力的基本特征;轴承的支承刚度大小和承载力的线性范围决定了轴承的基本性能。在Maxwell电磁力公式基础上,研究了这两个机电结构参数与轴承的基本性能的关系,得到了电磁力与位移之间线性与非线性关系的解析界限,并推导了在线性控制系统作用下,相对不同电磁轴承系统结构参数的最优线性范围和对应的最优刚度。

关键词: PID调节器, 电磁轴承, 刚度, 参数化模型, 超声检测, 焊点质量, 判别熵

Abstract: In active magnetic bearing (AMB) system, the most important mechatronical structure parameters are the air gap between rotator and stator and the bias flux density in stator, which affect the basic characteristic of stiffness and force capacity. The stiffness and the linear range of the force capacity decide the basic bearing performance. By analyzing the relationship between structure parameters and bearing performance based on the Maxwell’s equation, it has been found the there exists a theoretic boundary between the linearity and the nonlinearity of the electromagnet force relative to the variety of displacement, and there are also a optimal linearity range and optimal stiffness in each AMB system controlled by the linear system.

Key words: Active magnetic bearing (AMB), PID compensator, Stiffness, J-divergence entropy, Parameterized model, Ultrasonic testing, Welding spot quality

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