基于变增益NDOB的异步电机分段积分滑模控制
Variable Gain NDOB Disturbance Observer Based Piecewise Integral Sliding Mode Control of Induction Motor
崔鹏 1于海生 1孟祥祥 1满忠璐1
作者信息
- 1. 青岛大学 自动化学院,青岛 266071;青岛大学 山东省工业控制技术重点实验室,青岛 266071
- 折叠
摘要
为改进异步电机的动态性和鲁棒性,设计了一种新型的滑模控制方法.首先,滑模面引入平滑的分段饱和函数,改进传统的积分滑模控制,在传统积分滑模控制的跟踪精度下,获得更好的暂态性能;其次,采用了一种超扭曲类算法的新型趋近律,削弱了系统的抖振,提高系统的稳态性能;最后,设计变增益非线性扰动观测器,可消除初始时刻观测器峰值,准确估计因模型不确定性、负载扰动等集总扰动.通过与传统积分滑模控制器对比,实验结果证明该方法具有更好的快速性与稳定性.
Abstract
For improving the dynamic performance and robustness of induction motor,a novel sliding mode control method is designed.Firstly,a smooth piecewise saturation function is introduced into the sliding mode surface to improve the traditional integral sliding mode control,so that it can obtain better transient performance under the tracking accuracy of traditional integral sliding mode control.Secondly,a new ap-proach law is used to suppress chattering and improve the steady-state performance of the system.Finally,a variable gain nonlinear disturbance observer is designed,which can eliminate the estimated peak value at the initial time and accurately estimate the lumped disturbance due to model uncertainty and load disturb-ance.Compared with the traditional integral sliding mode controller,the experimental results show that the proposed method has better rapidity and stability.
关键词
异步电机/转速控制/分段函数/变增益扰动估计Key words
induction motor/speed control/piecewise function/variable gain disturbance estimation引用本文复制引用
基金项目
国家自然科学基金(62273189)
山东省自然科学基金(ZR2021MF005)
出版年
2024
NETL
NSTL
维普
万方数据