液压活套多变量系统的建模及积分变结构控制  

Modeling and Integral Variable Structure Control of Hydraulic Looper Multivariable System

作　　者：童朝南[1] 武延坤[1] 刘磊明[1] 李江昀[1] 

机构地区：[1]北京科技大学信息工程学院,北京100083

出　　处：《自动化学报》2008年第10期1305-1311,共7页Acta Automatica Sinica

基　　金：国家发改委高新技术项目(发改办高投[2005]1899)资助~~

摘　　要：为了实现热连轧中活套高度与张力系统的解耦控制,需对具有非线性、强耦合、不确定、多约束特性的活套系统建立工程上适用的数学模型.通过对活套系统动态耦合过程的分析,在工作点附件,结合伺服阀和液压缸的模型,建立起液压活套系统的动态数学模型.采用积分滑模变结构多变量解耦控制策略以减弱系统的耦合影响,提高控制效果.仿真结果验证了本算法的有效性,表明解耦后的活套控制系统可获得更好的控制效果.The looper system in hot rolling has the features of nonlinearity, strong coupling, uncertainty, and multi constrained. To improve the accuracy and quality of control, an appropriate model ought to be built to realize the decoupling of looper height and tension. By analyzing the dynamic coupling process of looper system and using the mathematical models of hydraulic cylinder and servo valve, a dynamic mathematical model of hydraulic looper system was built at the vicinity of the working point. The control strategy of sliding mode variable structure for a multivariable system was introduced to decouple the system and improve control effect. Simulation results show the effectiveness of the algorithm and the better control effect of the looper control system after decoupling.

关 键 词：活套系统 解耗电 建模 数学模型 滑模变结构控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]