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Volume 41 Issue 7
Jul.  2015
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Journal of Beijing University of Aeronautics and Astronautics  > 2015  >  41(7): 1246-1252.
LIU Chao, LIU Gang. Parameter identification of magnetic bearing based on rotor unbalance responses[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(7): 1246-1252. doi: 10.13700/j.bh.1001-5965.2014.0516(in Chinese)
Citation: LIU Chao, LIU Gang. Parameter identification of magnetic bearing based on rotor unbalance responses[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(7): 1246-1252. doi: 10.13700/j.bh.1001-5965.2014.0516(in Chinese)
shu

Parameter identification of magnetic bearing based on rotor unbalance responses

doi: 10.13700/j.bh.1001-5965.2014.0516
  • 1.

    School of Instrumentation Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • 2. Science and Technology on Inertial Laboratory, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 20 Aug 2014
  • Rev Recd Date: 11 Oct 2014
  • Publish Date: 20 Jul 2015
    Abstract
  • The force parameters of magnetic bearing obtained by theoretical design method were usually inaccurate. To solve this problem, an identification method based on rotor unbalance responses was proposed. Making the rotor rotate at high speed, the eccentric effect of the rotor imbalance can be used. The force parameters of magnetic bearing were calculated by measuring the synchronous currents when the rotor was in the null-displacement control mode and the synchronous displacements when the rotor was in the null-current control mode. The null-current controller and the null-displacement controller were designed based on the generalized notch filter theory, and the T matrix was set up to ensure the close loop was stable. The experimental results indicate that the difference rate between experiment identification result and the theoretical design result is within 20%. And it proves that the method is correct and effective to improve the identification precision for the force parameters of the magnetic bearing.

     

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