基于扩张状态观测器和LQ的轧机传动控制  

Control of Main Drive System of Rolling Mill Based on Extended State Observer and LQ

作　　者：郭香云[1] 张瑞成[1] 陈至坤[1] 童朝南[2] 

机构地区：[1]河北理工大学计算机与自动控制学院,河北唐山063009 [2]北京科技大学信息工程学院,北京100083

出　　处：《计算机仿真》2008年第10期344-348,共5页Computer Simulation

基　　金：唐山市科学技术研究与发展计划资助(07160202B-8)

摘　　要：轧机驱动电机与轧辊间采用长轴连接,连接轴刚度有限,在带材高速轧制时容易产生扭转振动现象。运用扩张状态观测器对系统状态和负荷扰动项进行观测,基于扩张状态观测器和LQ设计了具有负荷力矩前馈补偿的轧机主传动扭转振动控制系统。仿真结果表明:控制器有效改善了轧机主传动系统的跟踪性能,抑制了系统的扭转振动现象,同时对系统内部参数如轧辊转动惯量等的摄动也具有较强的鲁棒性。通过与传统电流、转速双PI控制和基于降维状态观测器的状态反馈控制比较,证明了方法的有效性和优越性。In the rolling mill main drive system, a shaft torsional vibration is often generated when a motor and a roll are connected with a flexible shaft. In this paper, extended state observer（ESO） ,a new observer is proposed to estimate the unknown states and the load torque disturbance. ESO and LQ （ Linear Quadratic） based speed controller with an integrator and load torque feedforward compensation for torsional vibration suppression in two - mass main drive system of rolling mill is proposed. The simulation results show that the controller effectively improves the performanees of command following, torsional vibration suppression, and robustness to parameter variation. Its validity and superiority are verified in comparison with the conventional PI controller and the state feedback controller based on reduced -order state observer.

关 键 词：轧机 两质量系统 扭转振动控制 扩张状态观测器 线性二次型 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]