热连轧液压活套系统非线性多变量建模及控制  

Modelling and control of hydraulic looper nonlinear multi-variable systems

作　　者：李壮举[1,2] 石馨[3] 刘贺平[1] 杨卫东[1] 

机构地区：[1]北京科技大学信息工程学院,北京100083 [2]北京建筑工程学院电信学院,北京100044 [3]沈阳航空职业技术学院航空电子工程系,沈阳110034

出　　处：《北京科技大学学报》2010年第10期1353-1359,共7页Journal of University of Science and Technology Beijing

基　　金：北京市教委重点学科共建资助项目(No.XK100080537)

摘　　要：为进一步提高带钢热连轧厚控精度及控制品质,在液压活套的工作点附近,考虑带钢自重、液压伺服系统和活套本身的非线性,建立了液压活套系统的非线性多变量动态数学模型,并验证了该模型的有效性.针对该模型,考虑未建模动态和各种扰动,提出了一种基于反推控制和扩张状态观测器(ESO)补偿的解耦控制方法.用Lyapunov稳定理论证明了闭环系统是鲁棒稳定的.仿真表明新的模型和解耦控制方法都是有效的.In order to improve the control accuracy and quality of automatic gauges in hot trip rolling, a nonlinear muhiple-input multiple-output （MIMO） model of hydraulic loopers was built close to the working point in consideration of strip weight and the nonlin- earity of hydraulic cylinders and loopers, and its validity was verified. A decoupling method based on back-stepping and extended state observers （ESO） was proposed for this new model taking all unmodelled dynamics and various disturbances into account. The robust stability of the closed-loop system was proved with the Lyapunov stability theory. Simulation results show that the proposed model and decoupling control method are available.

关 键 词：热轧 液压控制设备 非线性系统 建模 解耦 反推 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]