摘要
冷连轧过程中的厚度和张力系统具有多变量、强耦合和不确定特点,为了提高系统的控制精度和控制性能,提出了基于不变性原理解耦的H∞混合灵敏度鲁棒控制策略.首先,建立了厚度和张力系统的动态耦合模型,并应用不变性解耦原理实现了对厚度和张力系统的解耦.其次,针对系统存在的建模误差、参数摄动和外部扰动等不确定性,采用H∞混合灵敏度方法设计了鲁棒控制器来保证系统的鲁棒稳定性和鲁棒性能.仿真结果表明解耦后的厚度和张力系统可以获得更好的控制效果,验证了本算法的有效性.
The thickness and tension system in tandem cold rolling has the features such as multivariation,strong coupling and uncertainty.To improve its control accuracy and quality,a new robust control scheme based on the invariance-decoupling theory and H∞ mixed sensitivity method was presented.First,a dynamic coupling model for the thickness and tension system was built,and the invariance-decoupling theory was applied to completely decouple the thickness and tension system.Then,for systematic uncertainty of modeling error,parameter perturbation and external disturbance,a robust controller was designed based on H∞ mixed sensitivity method to ensure the robust stability and robust performance of the system.Simulation results show that the thickness and tension system after decoupling is controled better,proving the validity of the algorithm.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2010年第11期1500-1505,共6页
Journal of University of Science and Technology Beijing
基金
国家高技术专项项目(No.2005-1)
北京市教委重点学科控制理论与控制工程项目(No.XK100080537)
关键词
冷连轧机
鲁棒控制
多变量系统
耦合模型
解耦
灵敏度
cold rolling mills
robust control
multivariable systems
coupling model
decoupling
sensitivity
