PMSM分数阶滑模变结构MRAS仿真

针对永磁同步电机(PMSM)模型参考自适应控制系统(MRAS)中存在的抖振及转速估计精度低的问题,提出了一种分数阶滑模变结构MRAS转速辨识方法。首先建立了PMSM的参考模型和可调模型,利用参考模型和可调模型的电流输出误差来构造分数阶滑模面,其次设计了电机速度观测器,用Lyapunov稳定性理论证明了其可行性。最后利用MATLAB/SIMULINK软件搭建仿真模型进行仿真。仿真结果验证了PMSM分数阶滑模变结构速度观测器的有效性,具有更加精确地对转速进行跟踪的能力,有较好的鲁棒性。

Fractional-order Sliding Mode Variable Structure MRAS Simulation for Permanent Magnet Synchronous Motors

To deal with the chattering phenomenon and low speed estimation accuracy existing in Permanent Magnet Synchronous Motor(PMSM)Model Reference Adaptive Control System(MRAS),a fractional-order sliding mode variable structure MRAS rotational speed identification method was proposed.Firstly,by establishing the reference model and adjustable model of PMSM,the fractional sliding mode surface was constructed by using the current output error of the reference model and the adjustable model.Secondly the motor speed observer was designed,and the feasibility was proved by Lyapunov stability theory.The simulation results verify the effectiveness of the PMSM fractional sliding mode variable structure velocity observer,and it has the ability to track the rotation speed more accurately and has better robustness.