冷带轧机液压伺服位置系统的鲁棒输出反馈控制  

Robust output-feedback control for hydraulic servo-position system of cold-strip rolling mill

作　　者：李建雄[1] 方一鸣[1,2] 石胜利[1] 

机构地区：[1]燕山大学电气工程学院工业计算机控制工程河北省重点实验室,河北秦皇岛066004 [2]国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《控制理论与应用》2012年第3期331-336,共6页Control Theory & Applications

基　　金：国家自然科学基金资助项目(61074099)

摘　　要：针对具有参数不确定、不可测状态和未知外负载力的冷带轧机液压伺服位置系统,提出一种基于未知输入观测器的鲁棒输出反馈控制方法.首先,将含有外负载力的干扰项视为未知输入,构造未知输入观测器,然后基于所构造的观测器设计鲁棒输出反馈控制器.理论分析表明,所提出的控制方法能够保证闭环系统是一致有界稳定的,并具有鲁棒H∞性能.最后对某个650mm可逆冷带轧机液压伺服位置系统进行仿真研究,结果验证了所提出方法的有效性.A robust output-feedback control algorithm with unknown input observer is presented for the hydraulic servo-position system in a cold-strip rolling mill with uncertain parameters, immeasurable states and unknown external load forces. The disturbance term containing the unknown external load forces is regarded as an unknown input, for which we build an observer. A robust output-feedback controller is then designed with this observer. Theoretical analysis shows that the resulting closed-loop system is uniformly bounded stable, and has robust H-infinity performance. A simulation is carried out on the hydraulic servo position system of a 650 mm reversing cold-strip mill, results show the validity of the proposed algorithm.

关 键 词：输出反馈控制 未知输入观测器 轧机液压伺服位置系统 一致有界稳定 鲁棒H∞性能 

分 类 号：TG334.9[金属学及工艺—金属压力加工]