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Improvement of Shape Recognition Performance of sendzimir mill Control Systems Using Echo State Neural Networks

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Journal of Iron and Steel Research(International) 2014年第3期21卷 321-327页

作者： Jung-hyun PARK Seong-ik HAN Jong-shik KIM School of Mechanical Engineering Pusan National University School of Electrical Engineering Pusan National University

High rigidity twenty-high sendzimir mills （ZRMs） are widely used for rolling stainless steels, silicon sheets, etc. A ZRM uses a small diameter work roll to produce massive rolling forces. Since a work roll with a small diameter can be bent easily, strips often have complex shapes with mixed quarter and deep edge waves in the shape of plates. In order to solve this problem, fuzzy neural network controls are generally used for shape： recognition in ZRM control systems. Among various neural network types, the multi-layer perceptron （MLP） is typically used in current ZRMs. However, an MLP causes the loss of a large amount of shape recognition data. To improve the shape recognition per- formance of ZRM control systems, echo state networks （ESNs） are proposed to be used. Through simulation re- sults, it is found that shape recognition performance could be improved using the proposed ESN method.

关键词： sendzimir mill neural network multi-layer perceptron echo state network shape recognition

Analysis of Roll Gap Pressure in sendzimir mill by FEM

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Journal of Iron and Steel Research(International) 2008年第1期15卷 30-33页

作者： YU Hai-liang LIU Xiang-hua WANG Chao Park Hae-doo State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China Technical Research Laboratories POSCO Pohang 545-090 Korea

The acting force on the roll system of sendzimir mill was analyzed using 3D *** roll gap pressure distribution and the acting force between rolls S and O,rolls O and I,rolls O and J,rolls I and A,rolls I and B,as well as rolls J and B were *** results showed that the roll gap pressure mainly affected the roll surface layer,50 mm for backup roll;the roll gap pressure distribution is of double peaks among the work roll,the 1st intermediate roll（IMR）,and the 2nd IMR;the maximum value of the roll gap pressure between the backup roll and the second IMR appears on the edge of the barrel of rolls;the component force presents the in-para-curve *** are important for reducing the wear of rolls and the break of the backup roll and guiding for production.

关键词： roll gap pressure sendzimir mill FEM

A Fuzzy Shape Control Method for Stainless Steel Strip on sendzimir Rolling mill

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Journal of Iron and Steel Research(International) 2011年第3期18卷 17-23页

作者： HUR Yone-gi CHOI Young-kiu Technical Research Laboratories POSCO School of Electrical Engineering Pusan National University

The strip shape in the stainless steel process has made an issue of the strip *** objective of the shape control is to minimize the shape deviation and to maintain symmetrical shape patterns in the lateral *** method of the shape recognition employs the least square *** shape deviation is controlled by the fuzzy shape controller（FSC）.The experiments have been performed online for various stainless materials,thicknesses,and strip *** test results show very efficient performances in respect of stable target tracking and symmetrical and minimal fluctuation of the strip shape.

关键词： shape control fuzzy control stainless steel sendzimir mill