摘要
针对永磁同步电机滑模控制系统符号函数容易出现抖振问题,提出一种基于新型饱和函数的变指数趋近律结合非奇异快速终端滑模控制方法,并利用李雅普诺夫不等式证明其稳定性。考虑到外界负载转矩对系统性能的影响,建立非奇异终端滑模扰动观测器,将转矩的观测值转换成转矩电流前馈补偿至电流环输入端,避免了较大的滑模增益,克服外界突然加扰动时系统的抖振问题。仿真和实验结果表明:改进的新型滑模控制器结合扰动观测器可有效减小系统抖振,提高控制系统的动态响应能力和抗干扰能力。
Aiming at the chattering problem of sliding mode control system for permanent magnet synchronous motor(PMSM),a control method based on a new saturation function,variable exponential approach rate and non-singular fast terminal sliding mode,was proposed,and its stability was proved by using Lyapunov inequality.Considering the impact of external load torque on system per-formance,a non-singular terminal sliding mode disturbance observer was established,by which the observed torque values were con-verted into torque current feedforward compensation to the input side of the current loop,avoiding significant sliding mode gain and o-vercoming the system's chattering problem when external disturbances were suddenly added.The simulation and experimental results show that the improved sliding mode controller combined with disturbance observer can effectively reduce system chattering and improve the dynamic response and anti-interference ability of the control system.
作者
李璐
谭草
张玉学
郭春霖
孙兆岳
王子喆
LI Lu;TAN Cao;ZHANG Yuxue;GUO Chunlin;SUN Zhaoyue;WANG Zizhe(School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo Shandong 255049,China;Shandong Zhongbaokang Medical Appliance Co.,Ltd.,Zibo Shandong 256407,China)
出处
《机床与液压》
北大核心
2023年第23期183-187,共5页
Machine Tool & Hydraulics
基金
国家自然科学基金青年科学基金项目(51905319)
中国博士后科学基金项目(2021M691984)
山东省博士后创新项目(202102049)。
关键词
永磁同步电机
变指数趋近律
非奇异快速终端滑模
扰动观测器
Permanent magnet synchronous motor
Variable exponential reaching law
Non-singular fast terminal sliding mode
Disturbanceobserver
