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Volume 60 Issue 4
Aug.  2025
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Journal of Southwest Jiaotong University  > 2025  >  60(4): 976-985.
GONG Lei, HE Pai, SHI Yong, ZHU Changsheng. Non-Singular Fast Terminal Sliding Mode Rotor Position Control of Active Magnetic Bearings[J]. Journal of Southwest Jiaotong University, 2025, 60(4): 976-985. doi: 10.3969/j.issn.0258-2724.20240090
Citation: GONG Lei, HE Pai, SHI Yong, ZHU Changsheng. Non-Singular Fast Terminal Sliding Mode Rotor Position Control of Active Magnetic Bearings[J]. Journal of Southwest Jiaotong University, 2025, 60(4): 976-985. doi: 10.3969/j.issn.0258-2724.20240090
shu

Non-Singular Fast Terminal Sliding Mode Rotor Position Control of Active Magnetic Bearings

doi: 10.3969/j.issn.0258-2724.20240090
  • 1.

    School of Electrical and Control Engineering, Shaanxi University of Science & Technology, Xi’an 710016, China

  • 2.

    College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China

  • Received Date: 27 Feb 2024
  • Rev Recd Date: 13 Jun 2024
    • Available Online: 15 Nov 2024
  • Publish Date: 04 Jul 2024
    Abstract

  • In order to solve problems of slow system response speed and poor anti-interference ability in the position control of the rotor of active magnetic bearings (AMB), a position control method combining the non-singular fast terminal sliding function with the improved super-twisting reaching law was proposed to obtain fast and accurate control effects of dynamic responses. In addition, due to internal and external interference in the system, constant switching gain was added to the sliding mode reaching law, so as to ensure the robustness of the system, but it could exacerbate the system chattering. Therefore, the interference was observed and compensated by a nonlinear extended state observer, which alleviated the contradiction between chattering and anti-interference. Then, the stability of the proposed method was proven Lyapunov stability theory, and the proposed control method was verified by simulation and experiment. The results show that compared with the traditional sliding mode controller, the designed controller has faster response speed and stronger chattering suppression ability, and the time for the rotor to reach the target position is shortened by 56.4%. The dynamic performance of the system is improved, and the average control current is reduced by 68.5%. The chattering suppression ability of the system is enhanced, indicating that the proposed algorithm has strong robustness.

     

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