Yan Jingbin, Hu Haoxuan
School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, China.
PLoS One. 2025 Jul 11;20(7):e0328004. doi: 10.1371/journal.pone.0328004. eCollection 2025.
To strengthen the overall control capability of the permanent magnet synchronous motor (PMSM) system, an improved non-singular fast terminal sliding-mode control strategy is proposed, that can simultaneously improve the shortcomings of traditional PI and sliding mode control (SMC), which include a large overshoot, large jitter, and poor robustness. First, a new type of non-singular fast terminal sliding-mode surface was constructed according to a surface-mounted PMSM, which avoids singular phenomena in the system. An improved power-reaching law was designed, which not only enables the control system to quickly approach the error to zero, but can also better suppress the chattering phenomenon. Moreover, an adaptive law is introduced to regulate the reaching law coefficient in real time, which further increases the control precision. The system stability was proven using the Lyapunov stability theory. Second, a beat-free predictive current controller was designed for the current loop to further strengthen the system's dynamic response. The matching disturbance of the extended state observer (ESO) is subsequently introduced, and the observed value is transmitted to the designed speed controller in real time. The advantages of the proposed strategy were analyzed through simulations, and its reliability was verified experimentally. Finally, through the simulation and experimental results, it was concluded that the improved non-singular fast terminal sliding mode control (INFTSMC) strategy for PMSM systems can overcome the shortcomings of traditional PI and sliding-mode control systems and increase the response speed and anti-interference ability of the system.
为增强永磁同步电机（PMSM）系统的整体控制能力，提出了一种改进的非奇异快速终端滑模控制策略，该策略可同时改善传统PI控制和滑模控制（SMC）的缺点，包括超调量大、抖动大以及鲁棒性差等问题。首先，根据表贴式永磁同步电机构建了一种新型的非奇异快速终端滑模面，避免了系统中的奇异现象。设计了一种改进的趋近律，不仅能使控制系统快速将误差趋近于零，还能更好地抑制抖振现象。此外，引入自适应律实时调节趋近律系数，进一步提高了控制精度。利用李雅普诺夫稳定性理论证明了系统的稳定性。其次，为电流环设计了无差拍预测电流控制器，以进一步增强系统的动态响应。随后引入扩展状态观测器（ESO）的匹配干扰，并将观测值实时传输到设计的速度控制器中。通过仿真分析了所提策略的优点，并通过实验验证了其可靠性。最后，通过仿真和实验结果得出结论，永磁同步电机系统的改进非奇异快速终端滑模控制（INFTSMC）策略能够克服传统PI和滑模控制系统的缺点，提高系统的响应速度和抗干扰能力。
