冷连轧机厚控系统的PI型广义预测控制  

The PI Generalized Predictive Control in AGC Control System for Cold Mill

作　　者：梁秀霞[1] 王萌[1] 张强[1] 赵羽佳[1] 李金松[1] 

机构地区：[1]河北工业大学控制科学与工程学院,天津300130

出　　处：《化工自动化及仪表》2014年第5期497-500,共4页Control and Instruments in Chemical Industry

摘　　要：针对冷连轧带钢自动厚度控制系统的多变量、强耦合、非线性及纯延时等特点,提出具有简化PI结构的广义预测控制策略。将广义预测控制的目标函数改造成PI形式后,利用PI的反馈信息改善系统性能指标、抑制超调。简化后的PIGPC控制策略,计算量减少,提高了控制的实时性;同时利用预测信息提高了系统的稳定性;通过滚动优化,改善了系统的自适应抗干扰能力。仿真实验结果表明:采用简化后的PIGPC控制策略,有效地改善了系统的动态特性,抑制了超调,提高了跟踪速度和控制精度。Considering the multivariable , strong coupling , nonlinearity and the time-delay of the cold rolling strip’s automatic gauge control system（AGC）, the generalized predictive control（GPC） which boasting of a simplified PI structure was proposed .By transforming GPC ’ s objective function into PI , the PI feedback infor-mation can improve system performance and inhibit the overshoot; and simplified PIGPC control strategy can reduce calculation amount and improve the real-time control; and the predictive information can improve the system stability , as well as the rolling optimization can improve both adaptive and anti-interference ability .The simulation results show that the simplified PIGPC control strategy can improve the system ’ s dynamic character-istics, the tracking speed and the control precision and can inhibit the overshoot .

关 键 词：冷轧带钢 厚度控制 广义预测控制 PI结构 MATLAB仿真 

分 类 号：TH862.6[机械工程—仪器科学与技术]