摘要
针对永磁同步电机伺服系统调速控制中易受负载扰动等不确定性因素影响的问题,提出一种基于负载观测器的二阶滑模速度控制策略。根据二阶滑模理论设计速度控制器代替传统滑模控制器,使得不连续作用嵌置于滑模量导数中来削弱滑模抖振。同时引入负载观测器,对系统中负载响应进行观测估计,将观测值补偿到控制量中,提升系统抗扰动能力。仿真试验表明,该控制方法能够有效地削弱抖振,降低负载扰动的影响,系统调速呈现良好的鲁棒性。
In this paper,a second order sliding mode speed control strategy based on load observer is proposed to solve the problem that the speed regulation of PMSM servo system is easily affected by multiple uncertain factors such as load disturbance.Based on the second order sliding mode theory,the speed controller is designed to replace the traditional sliding mode controller,and chattering is reduced by embedding the discontinuous action in the derivative of the sliding mode.A load observer is introduced to observe and estimate the load response in the system.The observation value is compensated to the control value to improve the anti-disturbance ability of the system.Simulation experiments show that the strategy can effectively weaken chattering and reduce the influence of load disturbance,and the system speed regulation presents good robustness.
作者
薛高博
黄宴委
XUE Gaobo;HUANG Yanwei(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China)
出处
《电工技术》
2021年第8期16-18,22,共4页
Electric Engineering
