基于动态矩阵的永磁同步直线电机速度控制

Speed control of PM synchronous linear motor based on dynamic matrix

为了改善直线电机的动态响应性能,提高电机控制系统的鲁棒性,使电机稳定运行,基于预测控制理论,设计了适用于直线电机速度环控制的动态矩阵控制器,将传统的直线电机三闭环控制系统中的速度环PID控制器替换为动态矩阵控制器,并分别搭建基于PID速度控制器和动态矩阵速度控制器的永磁同步直线电机三闭环仿真模型,在此基础上给控制系统施加阶跃信号,并进行突加负载和突减负载的仿真,将2种控制器控制下的系统响应结果进行对比。仿真结果表明,当速度环采用动态矩阵控制后电机的响应速度更快,超调更小,使电机速度更快达到稳定。改进后的速度环控制器提高了直线电机控制系统的鲁棒性,改善了直线电机的动态响应性能,提高了控制系统的抗扰动能力,有利于电机在负载变化较大的情况下运行。

In order to improve the dynamic response performance of the linear motor, improve the robustness of the motor control system, and make the motor run stably, based on the theory of predictive control, a dynamic matrix controller suitable for speed loop control of linear motor is designed. The PID controller of speed loop in the traditional linear motor control system is replaced by dynamic matrix controller. The simulation models of the permanent magnet synchronous linear motors with PID controller and dynamic matrix speed controller are built. The step signal is applied to the control system, and the simulation under sudden load and sudden load reduction is completed. The response results of the systems with the two controllers are compared. The simulation results show that when the speed loop is controlled by dynamic matrix, the response speed of the motor is faster, the overshoot is smaller, and the motor speed is stable. The improved speed loop controller improves the robustness of the linear motor control system, the dynamic performance of the linear motor, and the anti-disturbance capability of the control system, which facilitates the operation of the motor under great load change conditions.