基于永磁同步电机二阶模型的终端滑模控制

Terminal Sliding Mode Control Based on Second Order Model of Permanent Magnet Synchronous Motor

滑模控制通常可分为趋近运动段和滑模运动段两部分,对于永磁同步电机调速系统而言,趋近段通常以最大电流运行,因此到达滑模线的加速度恒定,系统启动过程速度的区别主要体现在滑模运动段。为加快系统的启动响应速度,提高系统的动态性能,本文在推导出永磁同步电机调速系统二阶模型的基础上,设计了一种终端滑模控制器。所设计的控制器能够通过调节相关参数加速启动响应,并且相比于传统的PI控制具有更强的鲁棒性和抗扰性能。

Sliding mode control can be divided into two parts:the approaching motion section and the sliding mode motion section.For the permanent magnet synchronous motor speed control system,the approaching section usually runs with the maximum current,so the acceleration of the sliding mode line is constant,The difference in process speed is mainly reflected in the sliding mode motion segment.In order to speed up the system to start the response speed and improve the dynamic performance of the system,this paper designs a terminal sliding mode controller based on the second order model of permanent magnet synchronous motor speed control system.The designed controller can speed up the start-up response by adjusting the relevant parameters and has stronger robustness and rejection performance compared to conventional PI control.