Compound control for speed and tension multivariable coupling system of reversible cold strip mill  

作　　者：方一鸣 刘乐 李建雄 常茹 

机构地区：[1]Key Laboratory of Industrial Computer Control Engineering of Hebei Province(Institute of Electrical Engineering, Yanshan University) [2]National Engineering Research Center for Equipment and Technology of Cold Strip Rolling(Yanshan University)

出　　处：《Journal of Central South University》2015年第2期529-538,共10页中南大学学报（英文版）

基　　金：Project(61074099)supported by the National Natural Science Foundation of China;Project(LJRC013)supported by Cultivation Program for Leading Talent of Innovation Team in Colleges and Universities of Hebei Province,China;Project(B705)supported by Doctor Foundation of Yanshan University,China

摘　　要：To weaken the nonlinear coupling influence among the variables in the speed and tension system of reversible cold strip mill, a compound control(CC) strategy based on invariance principle was proposed. Firstly, invariance principle was used to realize static decoupling between the speed and tension of reversible cold strip mill. Then, considering the influence caused by the time variation of steel coil radius and rotational inertia of the left and right coilers, as well as the uncertainties, a CC strategy that is composed of extended state observer(ESO) and global sliding mode control(GSMC) with backstepping adaptive was proposed,which further realized dynamic decoupling and coordination control for the speed and tension system. Theoretical analysis shows that the resulting closed-loop system is global bounded stable. Finally, the simulation was carried out on the speed and tension system of a 1422 mm reversible cold strip mill by using the actual data, and through the comparison of the other control strategies, validity of the proposed CC strategy was shown by the results.To weaken the nonlinear coupling influence among the variables in the speed and tension system of reversible cold strip mill, a compound control（CC） strategy based on invariance principle was proposed. Firstly, invariance principle was used to realize static decoupling between the speed and tension of reversible cold strip mill. Then, considering the influence caused by the time variation of steel coil radius and rotational inertia of the left and right coilers, as well as the uncertainties, a CC strategy that is composed of extended state observer（ESO） and global sliding mode control（GSMC） with backstepping adaptive was proposed,which further realized dynamic decoupling and coordination control for the speed and tension system. Theoretical analysis shows that the resulting closed-loop system is global bounded stable. Finally, the simulation was carried out on the speed and tension system of a 1422 mm reversible cold strip mill by using the actual data, and through the comparison of the other control strategies, validity of the proposed CC strategy was shown by the results.

关 键 词：reversible cold strip mill speed and tension system decoupling invariance principle compound control extended state observer global sliding mode control 

分 类 号：TG333[金属学及工艺—金属压力加工]