第3期 令狐克志等:热轧带钢板形板厚反馈解耦控制 .341. 前相同的幅值为1、频率为1的正弦控制输入信号, 果明显,尤其是使得耦合严重的板厚调节对板形的 此时两个输出对副通道干扰调节输入量的响应如图 影响降到了可忽略的程度 4所示(图中的实线为激烈信号,虚线为响应曲线) 由响应曲线可以看出,输出响应与输入信号之间的 参考文献 副通道干扰非常之小,可以忽略不计,极大地改善了 [1]张进之,动态设定型板形板厚控制系统.冶金设备,2000(5): 6 板厚调节对板形的耦合影响,且状况稳定理想,实现 [2]黄庆学,梁爱生高精度轧制技术。北京:冶金工业出版社, 了带钢板形板厚的解耦控制目标, 2002 5结论 [3]曹建国,张杰,陈先霖,等。热轧带钢板形板厚综合控制系统 的耦合关系.北京科技大学学报,2000,22(6):551 (1)在板形控制数学模型和板厚控制数学模型 [4]连家创,刘宏民。板形板厚控制.北京:兵器工业出版社, 的基础上,结合工业生产实际,建立了板形板厚综合 1996 [5]王永初.解耦控制系统.成都:四川科学技术出版社,1985 控制耦合模型. [6]张进之,张宇.板形板厚数学理论.冶金设备,2002(3):4 (②)采用反馈解耦的方法,设计了解耦控制器, [7】卢秉林.板形一板厚综合控制方法的探讨.冶金设备,2002 实现了板形板厚综合控制的解耦,为综合提高热轧 (4):9 带钢质量奠定了理论基础 [8]李斌,何济民.现代控制理论.重庆:重庆大学出版社,2003 (③)计算机仿真结果表明,板形和板厚控制之 [9]Shinskey FG,过程控制系统应用设计与整定.3版.北京:清 华大学出版社,2004 间确实存在严重的耦合关系;解耦控制器的使用效 Feedback-decoupling for a combined shape and gauge control system in hot strip rolling LINGHU Kezhi,HE Anrui,YANG Quan,ZHAO Lin,GUO Xiaobo2) 1)National Engineering Research Center for Advanced Rolling.University of science and technology Beijing.Beijing 100083.China 2)Anshan Iron and Steel Company.Anshan 1140021.China ABSTRACI The essence of both automatic shape control (ASC)and automatic gauge control (AGC)is the controlling of loaded gap between rolls,so the closed control loops of ASC and AGC are coupled.The coupling between ASC and AGC holds down improvement of the combined controlling quality of ASC and AGC heavily. After the coupled process control model was developed,a feedback decoupling controller was proposed to decou- ple the model.The simulation result is perfect and indicates that the cross coupling between ASC and AGC espe cially the disturbance from AGC to ASC was depressed,which ensures the quality of the decoupling controller KEY WORDS steel plate:hot strip rolling:shape control;gauge control;feedback-decoupling前相同的幅值为1、频率为1的正弦控制输入信号 此时两个输出对副通道干扰调节输入量的响应如图 4所示(图中的实线为激烈信号虚线为响应曲线). 由响应曲线可以看出输出响应与输入信号之间的 副通道干扰非常之小可以忽略不计极大地改善了 板厚调节对板形的耦合影响且状况稳定理想实现 了带钢板形板厚的解耦控制目标. 5 结论 (1) 在板形控制数学模型和板厚控制数学模型 的基础上结合工业生产实际建立了板形板厚综合 控制耦合模型. (2) 采用反馈解耦的方法设计了解耦控制器 实现了板形板厚综合控制的解耦为综合提高热轧 带钢质量奠定了理论基础. (3) 计算机仿真结果表明板形和板厚控制之 间确实存在严重的耦合关系;解耦控制器的使用效 果明显尤其是使得耦合严重的板厚调节对板形的 影响降到了可忽略的程度. 参 考 文 献 [1] 张进之.动态设定型板形板厚控制系统.冶金设备2000(5): 6 [2] 黄庆学梁爱生.高精度轧制技术.北京:冶金工业出版社 2002 [3] 曹建国张杰陈先霖等.热轧带钢板形板厚综合控制系统 的耦合关系.北京科技大学学报200022(6):551 [4] 连家创刘宏民.板形板厚控制.北京:兵器工业出版社 1996 [5] 王永初.解耦控制系统.成都:四川科学技术出版社1985 [6] 张进之张宇.板形板厚数学理论.冶金设备2002(3):4 [7] 卢秉林.板形-板厚综合控制方法的探讨.冶金设备2002 (4):9 [8] 李斌何济民.现代控制理论.重庆:重庆大学出版社2003 [9] Shinskey F G.过程控制系统-应用设计与整定.3版.北京:清 华大学出版社2004 Feedback-decoupling for a combined shape and gauge control system in hot strip rolling LINGHU Kez hi 1)HE A nrui 1)Y A NG Quan 1)ZHAO L in 2)GUO Xiaobo 2) 1) National Engineering Research Center for Advanced RollingUniversity of science and technology BeijingBeijing100083China 2) Anshan Iron and Steel CompanyAnshan1140021China ABSTRACT The essence of both automatic shape control (ASC) and automatic gauge control (AGC) is the controlling of loaded gap between rollsso the closed control loops of ASC and AGC are coupled.The coupling between ASC and AGC holds down improvement of the combined controlling quality of ASC and AGC heavily. After the coupled process control model was developeda feedback decoupling controller was proposed to decouple the model.The simulation result is perfect and indicates that the cross coupling between ASC and AGC especially the disturbance from AGC to ASC was depressedwhich ensures the quality of the decoupling controller. KEY WORDS steel plate;hot strip rolling;shape control;gauge control;feedback-decoupling 第3期 令狐克志等: 热轧带钢板形板厚反馈解耦控制 ·341·