基于IMC观测器的永磁同步电机预测控制

Predictive Control for Permanent Magnet Synchronous Motor Based on IMC Observer

预测控制策略应用于永磁同步电机控制系统中可以实现快速的动态响应和高精度的跟踪控制,但依赖电机的数学模型,负载扰动会影响系统的控制性能。提出一种基于内模控制(IMC)的观测器与预测控制相结合的控制方法,基于模型预测控制算法和无差拍电流预测控制算法设计速度外环控制器和电流内环控制器以构成双环预测控制系统,设计IMC观测器估计负载扰动,据此产生转矩电流补偿量作为速度环的前馈补偿,实现扰动抑制。仿真结果表明,所提出的方法能够提高控制系统的动态响应性能和稳态精度,增强系统的鲁棒性。

Predictive control strategy is applied to permanent magnet synchronous motor control system,it can achieve fast dynamic response and high-precision tracking control,but depending on the mathematical model of the motor,the load disturbance will affect the control performance of system.A new control method combining an observer based on internal model control(IMC) and predictive control was presented.The inner-loop current controller and the outer-loop speed controller based separately on model predictive control algorithm and deadbeat current predictive control algorithm were designed to form dual-loop predictive control system.An IMC observer is designed to estimate the load disturbance,and torque-current compensation is produced as feedforward of speed loop to attenuate the disturbance.The simulation results show that the proposed method can improve the dynamic response performance and steady-state precision of the control system,and the robustness is greatly enhanced.