基于GSMC的改进自抗扰PMLSM控制
Improved Active Disturbance Rejection Control of PMLSM Based on GSMC
娄云浩 1刘春芳1
作者信息
- 1. 沈阳工业大学电气工程学院,沈阳 110870
- 折叠
摘要
针对永磁同步直线电机(PMLSM)系统存在外界扰动等不确定性而使系统性能变差问题,提出了一种改进型全局滑模自抗扰控制方案.首先,考虑到扩张状态观测器中传统的非线性函数fal在原点附近不够平滑存在拐点会降低控制精度,引入了平滑性更好的Sigfal函数对其进行替换;其次,对于非线性状态误差反馈控制律部分,因参数多整定困难,影响了反馈控制的性能,采用全局滑模控制(GSMC)实现反馈控制,以提高反馈控制部分的动态及抗扰动性能;最后,用Lyapunov理论证明了系统稳定性,仿真结果表明该方案能够提高速度跟踪精度、保证动态性能同时提高了系统鲁棒性.
Abstract
Based on the difficulty that the capability of the permanent magnet linear synchronous motor(PMLSM)system deteriorates due to uncertainties such as external disturbances,an improved global slid-ing mode active disturbance rejection control scheme was proposed.First of all,considering that the tradi-tional nonlinear function fal in the extended state observer is not smooth enough near the origin and has an inflection point,which will reduce the control accuracy,a Sigfal function with better smoothness is intro-duced to replace it.Secondly,Aiming at that the parameters of the nonlinear state error feedback control law(NLSEF)are too many thus difficult to tune and affects the performance of feedback control.The global sliding mode control(GSMC)is used to realize the feedback control to improve the dynamic and anti-dis-turbance performance of the feedback control part.The Lyapunov theory turn out system stability.In the end,the simulation results show that this approach can improve speed tracking accuracy,ensure dynamic performance,and enhance system robustness.
关键词
永磁同步直线电机/全局滑模控制/新型非线性函数/改进自抗扰控制Key words
PMLSM/global sliding mode control/new nonlinear function/improved active disturbance re-jection control引用本文复制引用
出版年
2024
NETL
NSTL
万方数据