• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
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Volume 57 Issue 3
Jul.  2022
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Journal of Southwest Jiaotong University  > 2022  >  57(3): 540-548.
ZOU Shengnan, LIU Chang, DENG Shutong, LIU Ying, CHEN Pengrong. Decoupling and Control Stability Analysis Based on Hybrid Repulsion Maglev Platform[J]. Journal of Southwest Jiaotong University, 2022, 57(3): 540-548. doi: 10.3969/j.issn.0258-2724.20210750
Citation: ZOU Shengnan, LIU Chang, DENG Shutong, LIU Ying, CHEN Pengrong. Decoupling and Control Stability Analysis Based on Hybrid Repulsion Maglev Platform[J]. Journal of Southwest Jiaotong University, 2022, 57(3): 540-548. doi: 10.3969/j.issn.0258-2724.20210750
shu

Decoupling and Control Stability Analysis Based on Hybrid Repulsion Maglev Platform

doi: 10.3969/j.issn.0258-2724.20210750
  • 1.

    Quanzhou Institute of Equipment Manufacturing, Haixi Institutes, Chinese Academy of Sciences, Jinjiang 362200, China

  • 2.

    School of Advanced Manufacturing, Fuzhou University, Fuzhou 350108, China

  • Received Date: 28 Sep 2021
  • Rev Recd Date: 02 Mar 2022
  • Publish Date: 11 Mar 2022
    Abstract

  • In order to study the multi-degree-of-freedom coupling problem in the magnetic levitation platform system, a design idea of using passive force between permanent magnets to reduce the active control in the vertical direction is proposed, and the structure design of a repulsion maglev platform is given. The stator of the magnetic suspension structure studied is composed of permanent magnet and electromagnetic coils. Its characteristic is that the permanent magnet provides the main suspension force, and the electromagnetic coils provide the horizontal driving force, so as to reduce the number of coils responsible for active suspension, and reduce coil power consumption and heat generation. Firstly, the Laplace equation satisfied by the scalar potential was derived based on the magnetic charge model, the analytical expression of the scalar potential was obtained by using the separation variable method. And the force of the float in the whole magnetic field was accurately calculated. Next, the stable region of passive suspension force between stator and mover permanent magnet was fully studied and discussed, the decoupling of the force in the vertical direction was simplified and ignored, and the mathematical model of the controlled object was established. The digital integrated controller centered on the micro-control unit was developed. The levitation performance of the platform was studied by experiments. The research results show that the hybrid repulsion maglev platform proposed in this paper can realize the stable motion control of the above float within the horizontal range of ± 4 mm of the suspension height of 23 mm, and can realize the stable horizontal motion, and the displacement change of the float in the vertical direction does not exceed 0.2 mm.

     

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