冷轧机压下伺服系统的输出反馈有限时间控制研究  

Output Feedback Finite Time Control for the Under Pressure Servo System of Cold Rolling Mill

作　　者：陈贵林[1] 汤雅超[1] 吴忠强[1] CHEN Gui-lin;TANG Ya-chao;WU Zhong-qiang(Key Lab of Industrial Computer Control Engineering of Hebei Province,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学工业计算机控制工程河北省重点实验室

出　　处：《数学的实践与认识》2018年第19期165-173,共9页Mathematics in Practice and Theory

基　　金：河北省自然科学基金(F2016203006)

摘　　要：针对冷轧机压下电液伺服系统存在非线性、参数不确定性和负载干扰等特点，提出了基于扩张状态观测器的输出反馈有限时间控制方法．利用扩张状态观测器对系统的状态变量进行观测，解决了电液伺服系统的速度和加速度难以实际测量的难题，并对未知函数及扰动具有鲁棒性．依据有限时间控制理论并结合反步构造法设计了有限时间控制器，并证明了系统的全局稳定性．仿真表明：扩张状态观测器能够快速准确的观测系统的状态；基于扩张状态观测器的有限时间控制方法能使系统快速、准确地跟踪指定位置目标，并具有很强的鲁棒性．In this paper, an output feedback finite time control method is presented based on the extended state observer for the cold rolling mill under pressure electro-hydraulic servo nonlinear system with uncertain parameters and load disturbances. The extended state ob- server is employed to observe the state variables of system, so as to solve the problem that the speed and acceleration of electro-hydraulic servo system is difficult to measure, and make the system has robustness for unknown function and disturbance. According to the finite time control theory, the finite time controller is designed by backstepping method, and the global stability of the controller is proved. The simulation results show that the extended state observer can estimate the system state variables quickly and accurately; The finite time controller based on extended state observer can make the system track the specified location quickly and accurately, and has strong robustness.

关 键 词：扩张状态观测器 有限时间控制 电液伺服系统 

分 类 号：TG333[金属学及工艺—金属压力加工]