摘要
针对直接驱动永磁直线同步电动机(PMLSM)系统的各种不确定性,提出一种将定量反馈理论(QFT)和H∞理论相结合的鲁棒控制策略.该控制策略通过合理选取被控对象不确定性权函数、高频噪声抑制权函数和灵敏度权函数,利用以线性矩阵不等式(LMI)为基础的H∞控制求得QFT速度控制器,简化了单纯QFT设计鲁棒控制器时繁琐的做图过程,所设计的控制器在保证快速性的同时,抑制了闭环系统内各种不确定性因素的影响.仿真结果表明,该方案实现了伺服系统的快速跟踪性能,对系统的参数变化和阻力扰动具有很强的鲁棒性.
For the various uncertainties of direct-drive permanent magnet linear synchronous motor(PMLSM) system,a robust control strategy of combining the quantitative feedback theory(QFT) and H∞ theory was proposed.The QFT speed controller was obtained by using the H∞ control based on linear matrix inequalities(LMI) and through reasonably selecting the uncertainty weight function,high-frequency noise suppression weight function and sensitivity weight function.The complicated mapping process in designing robust contr...
出处
《沈阳工业大学学报》
EI
CAS
2010年第6期615-619,638,共6页
Journal of Shenyang University of Technology
基金
国家自然科学基金资助项目(50805098)
关键词
永磁直线同步电动机
定量反馈理论
H∞控制
闭环系统
不确定性
线性矩阵不等式
鲁棒性
跟踪性
permanent magnet linear synchronous motor
quantitative feedback theory
H∞ control
closed-loop system
uncertainty
linear matrix inequality
robustness
tracking performance
