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Active Magnetic Bearings Stiffness and Damping Identification from Frequency Characteristics of Control System

机译：基于控制系统频率特性的主动电磁轴承刚度和阻尼识别

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摘要

At present, the stiffness and damping identification for active magnetic bearings (AMBs) are still in the stage of theoretical analysis. The theoretical analysis indicates that if the mechanical structure and system parameters are determined, AMBs stiffness and damping are only related to frequency characteristic of control system, ignoring operating condition. More importantly, few verification methods are proposed. Considering the shortcomings of the theoretical identification, this paper obtains these coefficients from the experiment by using the magnetic bearing as a sine exciter. The identification results show that AMBs stiffness and damping have a great relationship with the control system and rotating speed. Specifically, at low rotating speed, the stiffness and damping can be obtained from the rotor static suspension by adding the same excitation frequency. However, at high speed, different from the static suspension situation, the AMBs supporting coefficients are not only related to the frequency characteristics of control system, but also related to the system operating conditions.
机译：目前，主动式电磁轴承（AMB）的刚度和阻尼识别仍处于理论分析阶段。理论分析表明，如果确定了机械结构和系统参数，则AMB的刚度和阻尼仅与控制系统的频率特性有关，而忽略了运行条件。更重要的是，很少提出验证方法。考虑到理论辨识的不足，本文以磁轴承为正弦激励器，从实验中获得了这些系数。辨识结果表明，AMBs的刚度和阻尼与控制系统和转速有很大关系。具体地，在低转速下，通过增加相同的激励频率，可以从转子静态悬架获得刚度和阻尼。然而，在高速下，不同于静态悬挂情况，AMBs的支撑系数不仅与控制系统的频率特性有关，而且与系统的工作条件有关。

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  • 来源
    《Shock and vibration》 |2016年第2期|1067506.1-1067506.8|共8页
  • 作者

    Jin Chaowu; Xu Yuanping; Zhou Jin; Cheng Changli;

  • 作者单位

    Nanjing Univ Aeronaut & Astronaut, Coll Mech & Elect Engn, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Mech & Elect Engn, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Mech & Elect Engn, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Mech & Elect Engn, Nanjing 210016, Jiangsu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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