摘要
针对永磁同步电机传统PI调速系统中存在响应速度慢、控制精度低和鲁棒性差等问题,本文设计了一种新型滑模调速系统。首先,提出一种新型变指数趋近律,并采用新型分段指数型函数优化开关项,提升了趋近速度的同时削弱了系统抖振;其次,在新型变指数趋近律的基础上设计非奇异快速终端滑模速度控制器,进一步提高系统动态响应;最后,设计一种改进扩展扰动观测器,并基于Landau离散自适应辨识算法提出一种级联扰动补偿策略,实现对系统所受不确定扰动的前馈补偿,进一步提高调速系统的快速性和抗干扰性。仿真结果表明,所设计的滑模调速系统能够有效地提高系统的动态控制性能、控制精度和鲁棒性。
In response to the issues of slow response,low control precision,and poor robustness in the traditional PI speed control system for permanent magnet synchronous motors,the paper proposed a novel sliding mode speed control system.Firstly,a new variable exponent approaching law was introduced,and a novel segmented exponent-type function was employed to optimize the switching term,enhancing the approaching speed while attenuating system oscillations.Secondly,based on the new approaching law,a non-singular fast terminal sliding mode speed controller was designed to further improve the system s dynamic response.Finally,an improved extended disturbance observer was designed,and a cascade disturbance compensation strategy was proposed based on the Landau discrete adaptive identification algorithm to achieve feedforward compensation for uncertain disturbances affecting the system,further enhancing the speed and disturbance rejection capabilities of the speed control system.Simulation results demonstrate that the designed sliding mode speed control system effectively improves the dynamic control performance,control precision,and robustness of the system.
作者
温超
邱楠
WEN Chao;QIU Nan(School of Locomotive and Vehicle Engineering,Dalian Jiaotong University,Dalian Liaoning 116028,China)
出处
《微电机》
2024年第4期18-23,共6页
Micromotors
