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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2026-07-20
A Fixed-Time Fast Integral Terminal Sliding Mode Speed Control Strategy with Super-Twisting Observer for SPMSM
By
Qianghui Xiao,

    Dr. Qianghui Xiao

    Hunan University of Technology

    China

    Homepage

Zheng Xiong,

    Dr. Zheng Xiong

    Hunan University of Technology

    China

    Homepage

Li Yang,

    Dr. Li Yang

    Hunan University of Technology

    China

    Homepage

Dengliang Xia,

    Dr. Dengliang Xia

    Hunan University of Technology

    China

    Homepage

Xing Yuan,

    Dr. Xing Yuan

    Hunan University of Technology

    China

    Homepage

Sheng Wang

    Dr. Sheng Wang

    Hunan University of Technology

    China

    Homepage

Progress In Electromagnetics Research C, Vol. 171, 501-514, 2026
doi:10.2528/PIERC26052103 | Google Scholar

Abstract
To improve the dynamic performance and disturbance rejection of a Surface Permanent Magnet Synchronous Motor (SPMSM) speed control system, a speed regulation method based on a continuous adaptive fast terminal sliding mode is proposed in this study. First, a novel adaptive variable-gain reaching law (NVGRL) is introduced. By combining the variable gains of the system states with fuzzy adaptive inference rules, the boundary layer width was adjusted in real time to reduce the convergence time to the equilibrium point and suppress chattering. Second, a novel fast integral terminal sliding mode surface (NFITSMS) is designed to improve the global convergence rate. To maintain an ideal speed even under external disturbances and torque surges, a novel finite-time-based super-twisting sliding mode disturbance observer (NSTDO) is designed. The control strategy proposed in this study employs Lyapunov stability theory to provide a closed-loop stability analysis within a fixed time. Finally, the experimental results confirm that the proposed method enhances the speed response, tracking accuracy, and disturbance rejection capability of the SPMSM control system.
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Citation
Qianghui Xiao, Zheng Xiong, Li Yang, Dengliang Xia, Xing Yuan, and Sheng Wang, "A Fixed-Time Fast Integral Terminal Sliding Mode Speed Control Strategy with Super-Twisting Observer for SPMSM," Progress In Electromagnetics Research C, Vol. 171, 501-514, 2026.
doi:10.2528/PIERC26052103
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