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Dynamic Optimization of Feedforward automatic gauge control Based on Extended Kalman Filter

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Journal of Iron and Steel Research International 2008年第2期15卷 39-42页

作者： YANG Bin-hu YANG Wei-dong CHEN Lian-gui QU Lei School of Information Engineering University of Science and Technology Beijing Beijing 100083 China

automatic gauge control is an essentially nonlinear process varying with time delay,and stochastically varying input and process noise always influence the target gauge control *** improve the control capability of feedforward automatic gauge control,Kalman filter was employed to filter the noise signal transferred from one stand to *** linearized matrix that the Kalman filter algorithm needed was concluded;thus,the feedforward automatic gauge control architecture was dynamically *** theoretical analyses and simulation show that the proposed algorithm is reasonable and effective.

关键词： automatic gauge control feedforward control extended Kalman filter

State Identification of automatic gauge control Hydraulic Cylinder Using Acoustic Emission

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State Identification of Automatic Gauge Control Hydraulic Cy...

2013年中国智能自动化学术会议

作者： Hongzhi Chen Chao Wu Yanguang Sun Hua Zhao State Key Laboratory of Hybrid Process Industry Automation System and Equipment Technology Automation Research and Design Institute of Metallurgical Industry Drive Department Beijing Aritime Intelligent Control Co.Ltd

The growing requirements of steel products qualities bring even tricky restrictions to the hydraulic cylinder which acts as a screw down to maintain the rolling spaces ***,faults and disfunctions are unavoidable and bring underlying safety *** with un-expected loading is one of major impact that may cause catastrophic consequence happen to the cylinder,as the classical diagnostic process to-some-extent lack of cross-validating and timeconsuming, the paper proposes the potentials of using acoustic emission to fill the *** works include the data acquisition process to record the ultrasound acoustic signals from the hydraulic cylinder,application of modified image based acoustic emission approach to generate visual effects,as well as the application of principal component analysis to project the profiles onto the 3D plane for further *** the analysis of image based profiles,the subtle differences of various cylinder conditions can be examined using the pixel and intensity values. By assessing the projection of profiles in the principal component space,a clear trajectory can be observed with normal and overload conditions allocated upon the positive and negative sides of the *** result provided not only the potential of using acoustic emission for dynamic state identification of the subtle changes,but also opens up the possibility of preventive measures to the cylinder at risks.

关键词： State identification Acoustic emission automatic gauge control

Influence of mill modulus control gain on vibration in hot rolling mills

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Journal of Iron and Steel Research International 2020年第5期27卷 528-536页

作者： Jie-bin Qi Xin-xin Wang Xiao-qiang Yan School of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China Research Institute of Technology Shougang Group Co.Ltd.Beijing 100043China

The rolling mill vibration is characterized by the coupling effects among mechanical,electrical,hydraulic and interfacial *** influence of the mill modulus control gain in automatic gauge control on the vibration in hot rolling mills was ***,an experiment related to the mill modulus control gain was carried out in the hot rolling mill process,and it was found that the rolling mill vibration increases with the mill modulus control ***,based on the Sims rolling force method,the coupling dynamic model was established to explain this ***,the influence of mill modulus control gain on the vibration was analyzed numerically on the basis of the coupling dynamic ***,the agreement between the experimental results and the simulation results was confirmed and the measure reducing the mill modulus control gain was obtained to relieve mill vibration.

关键词： Rolling mill vibration Coupling dynamic model automatic gauge control Mill modulus control gain Vibration suppression

Improved Smith prediction monitoring AGC system based on feedback-assisted iterative learning control

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维普期刊数据库

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Journal of Central South University 2014年第9期21卷 3492-3497页

作者：张浩宇孙杰张殿华陈树宗张欣 State Key Laboratory of Rolling and Automation Northeastern University

The performance of Smith prediction monitoring automatic gauge control(AGC) system is influenced by model mismatching greatly in strip rolling process. Aiming at this problem, a feedback-assisted iterative learning control strategy, which learned unknown modeling error by using previous control information repeatedly, was introduced into Smith prediction monitoring AGC system. Firstly, conventional Smith predictor and improved Smith predictor with PI-P controller were analyzed. Secondly, on the basis of establishing of feedback-assisted iterative learning control strategy for improved Smith predictor, process control signal update law and control error were deduced, then convergence condition of this strategy was put forward and proved. Finally, after modeling the automatic position control system, the PI-P Smith prediction monitoring AGC system with feedback-assisted iterative learning control was researched through simulation. Simulation results indicate that this system remains stable during model mismatching. The robustness and response of monitoring AGC is improved by development of feedback-assisted iterative learning control strategy for PI-P Smith predictor.

关键词： automatic gauge control Smith predictor monitoring automatic gauge control (AGC) feedback-assisted iterativelearning control automatic position control

Adaptive Modification of the Rolling Force Prediction

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Journal of Beijing Institute of Technology 2002年第1期11卷 33-36页

作者：姚小兰张迪生梁启宏胡浩平北京理工大学自动控制系北京100081

In rolling process, the rolling force is an important parameter. The precision of the predicted rolling force will directly affect the precision of the finished product. By using adaptive control theory and fusing the measured and predicted data, the precision of the predicted rolling force is gradually improved. This system has been used in plant for more than one year, and the result of the application shows that the system has steady and reliable performance, and high precision.

关键词： hot rolling four high mill automatic gauge control bender roller

Dual Perturbation AGC Design Based on QFT/μ controller in Hot Strip Rolling Process

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Dual Perturbation AGC Design Based on QFT/μ Controller in H...

第二十九届中国控制会议

作者： ZHANG Ming 1,YANG Weidong 1,WANG Shaofu 1,2 1.Key Laboratory of Advanced control of Iron and Steel Process(Ministry of Education),University of Science and Technology Beijing,Beijing 100083,P.R.China2.Laiwu Steel Corporation,Laiwu 271104,P.R.China

The application of u-synthesis controller based on Quantitative Feedback Theory（QFT）tuning method in hot rolling automatic gauge control（AGC）system is delivered in this *** the proposed strategy,a renowned dual-perturbation AGC model is *** the stiffness uncertainties and nonlinear parts,the integration of optimal control μ-synthesis and manual tuning in the QFT design environment enable controller design with a high level of robust performance and robust ***’s open-loop tuning can be more transparent than closed-loop tuning in industrial *** simulation results show the combined controller is of better gauge control response and more effective on disturbance attenuation.

关键词： automatic gauge control Dual-Perturbation QFT μ-Synthesis

Data-driven Modeling and Online Algorithm for Hot Rolling Process

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Data-driven Modeling and Online Algorithm for Hot Rolling Pr...

第三十届中国控制会议

作者： LIANG Hui~(1,2),TONG Chaonan~(1,2),PENG Kaixiang~(1,2) 1.School of Information Engineering,University of Science and Technology Beijing 100083,P.R.China 2.Key Laboratory of Advanced control of Iron and Steel Process(Ministry of Education), University of Science and Technology Beijing,Beijing 100083,P.R.China

＜正＞Based on the idea that the accuracy of model could be significantly improved by combing several sub-models,a multiple support vector machine（MSVM） modeling approach is proposed to build the strip thickness model in hot rolling automatic gauge control（AGC） *** subtractive clustering is adopted to divide the input space into several clusters,and each cluster subset is built by Least-square support vector *** when the online data constantly increased,the clustering subset is updated on-line by subtractive clustering algorithm,and the parameter of each local model is updated by the recursion *** results of experiment demonstrate the method the effectiveness of the proposed modeling approach,and it has powerful ability of online learning.

关键词： Data-driven automatic gauge control Multiple models Support vector machine subtractive clustering

Research of New Roll Eccentricity control for Cold Tandem Mill

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Research of New Roll Eccentricity Control for Cold Tandem Mi...

第五届流体传动与控制国际会议

作者： Zhang Wei Wang Yiqun Sun Menghui Wang Haifang Mechanical Engineering Department of Yanshan University Qinhuangdao 066004 China

＜正＞The problem of roll eccentricity for cold tandem mill is proposed,and the influence of eccentricity on strip gauge is *** mathematical model that includes the dynamic characteristic of the hydraulic screw down system has been *** control theory is applied to the roll eccentricity control as the roll eccentricity is a periodic disturbance related to the rotational angle of the *** July 2005,a new roll eccentricity control system was successfully used at WanDa Steel’s works in ZhangJiaGang,*** has contributed to improved thickness accuracy.

关键词： cold tandem mill roll eccentricity control automatic gauge control hydraulic screw down system