冷连轧机厚度和张力系统的多变量解耦鲁棒控制-控制理论与应用.PDF

28 4 Vol. 28 No. 4 2011 4 Control Theory Applications Apr. 2011 :2011 , (, 100083) : , H . , , , , H . . : ; H; ; : TP273 : A Multivariable decoupling robust control for the thickness and tension system of tandem cold rolling mill LI Zhong-de, YANG Wei-dong (School of Information Engineering, University of Science and Technology Beijing, Beijing 100083, China) Abstract: Based on the invariance-decoupling theory, a new robust control scheme using H-infinity mixed sensitivity is introduced for thickness and tension system with the features of multivarivble, strong coupling and uncertainty in tandem cold rolling process. The thickness and tension dynamic coupling model is built, and the invariance-decoupling theory is used to decouple the MIMO system to weaken the coupling effects. Then a robust controller is designed using H- infinity mixed sensitivity method for system uncertainty of dynamic model parameter perturbation and external disturbance to insure the robust stability and robust performance. Simulation results show the effectiveness of the algorithm for the thickness and tension system. Key words: thickness and tension coupling model; H-infinity control; decoupling; mixed sensitivity 1 (Introduction) , , , H , . . , . , , 2 (Thi- , ckness and tension system modeling and de- , coupling design) . 2.1