Multivariable decoupling robust control for the thickness and tension system of tandem cold rolling mill
冷连轧机厚度和张力系统的多变量解耦鲁棒控制

Based on the invariance-decoupling theory, a new robust control scheme using H-in nity 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-in nity 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.