Sliding Mode Active Disturbance Rejection Control for PMSM Based on Improved ESO
To solve the problem that the current loop of permanent magnet synchronous motor(PMSM)servo system was prone to buffeting when it was affected by interference and parameter change under traditional PI control,and the system performance deteriorates due to poor robustness,an improved sliding mode active disturbance rejection control strategy was proposed.Firstly,a new fal function was designed to solve the problem that the fal function was not smooth around the origin in traditional active disturbance rejection con-trol,which was easy to cause buffeting.Secondly,in order to reduce the number of parameters to be adjus-ted,a new approach law and a new control function were designed.The stability of the new approach law was analyzed by using Lyapunov function,and a new sliding mode extended state observer was obtained by introducing an extended state observer.Simulink simulation model was built for simulation experiment.The results show that,compared with the traditional PI control and active disturbance rejection control,the de-signed SM-ADRC has better anti-interference ability and control accuracy while simplifying parameter tun-ing,which effectively ensures the robustness of the system.
permanent-magnet synchronous motorsliding mode active disturbance rejection controlfal functionnew approach lawnew control function
万方数据
维普
