Suppression of mechanical resonance based on higher-order sliding mode and acceleration feedback
基于高阶滑模和加速度反馈的机械谐振抑制方法

Two higher-order sliding mode controllers are separately designed for controlling the stator current and the motor speed of a permanent-magnet synchronous motor. The nonsingular terminal sliding mode manifolds are utilized to make the stator current converge within a finite period of time. The acceleration feedback is introduced in the speed loop to reduce the influence of mechanical resonance. Simulation results show that, compared with the PI controller combined with a notch filter and the acceleration feedback, the proposed method suppresses mechanical resonance more effectively, ensures the desired dynamic response performance, and improves the robustness with respect to the load disturbance.