[Objective] To address the issues of low control precision

slow convergence

and strong chattering in permanent magnet synchronous motor (PMSM) under rapid acceleration/deceleration and load changes

this paper proposes a fractional-order dynamic boundary layer super-twisting sliding mode active disturbance rejection control (FO-DBL-STSM-ADRC) strategy. [Methods] Firstly

the ADRC was integrated with the STSMC algorithm to enhance adaptability under complex operating conditions. Next

a novel DBL sliding mode surface was designed

which dynamically adjusted the boundary layer structure to improve the system’s dynamic response speed and load disturbance rejection capability. Then

fractional-order calculus was introduced to effectively suppress the inherent high-frequency chattering of traditional sliding mode control

significantly enhancing the system’s ability to inhibit steady-state errors and chattering. Finally

the superiority and robustness of the proposed FO-DBL-STSM-ADRC strategy were verified through simulation and experiment under various complex operating conditions. [Results] The simulation and experiment results showed that

compared to the other three strategies

the proposed FO-DBL-STSM-ADRC strategy demonstrated significant advantages in terms of response speed

steady-state control precision

load disturbance rejection capability

and overall system robustness. [Conclusion] The proposed FO-DBL-STSM-ADRC strategy not only provides an effective solution for the high-performance operation of PMSM

but also offers technical support for demanding engineering applications such as electric vehicle drives and rail transit door control systems.