Year-end Sale % OFF 
Abstract
A Sendzimir rolling mill (ZRM), one of the rolling mill systems, is a machine used to obtain a steel strip with a desired shape in cold rolling. Model based controllers are mainly used for the shape control, but it is difficult to obtain the mathematical model of the ZRM, so model identification should be used. This study proposes a method identifying static model of the ZRM. To identify the static model of the ZRM, a mill matrix (G m ) is obtained that expresses the linear relation between the actuators, and the shape of the strip and the data obtained through the ZRM's operation are used to obtain G m However, as the operation data are affected by large measurement noise, and the patterns of the multiple control inputs are not diverse, this results in an inaccurate estimation. Therefore, a data processing method using multiple valid sets of operation data is proposed to estimate G m . Additionally, a G m update method is suggested to estimate the G m whenever a single pass operation is finished, according to the static model change of the plant. The proposed method is verified by comparing the results with the real operation data. This research will be helpful in all industries that use rolling mill machines such as 4-high mill, 6-high mill, and clustering mill in hot and cold rolling.
Highlights
Rolling mill system consists of several mills and the strip to be rolled passes between the mills to control the thickness and shape in hot and cold rolling [1]–[16], which affects the quality of the strip in the steel process
By comparing several Gpm based on the update method, we confirmed the matrix change caused by the ZRM change
We compared the NMSE by the Gpm with and without the update method, and we found that the update method is necessary to apply the system changes to the model simultaneously
Summary
Rolling mill system consists of several mills and the strip to be rolled passes between the mills to control the thickness and shape in hot and cold rolling [1]–[16], which affects the quality of the strip in the steel process. When a strip is passed through the ZRM, small work rolls above and below the strip alter its shape, flattening it This is possible even for thin or hard materials, as a cluster of large rolls transmit a strong load to the small work roll, which presses hard on the strip, shaping it to the desired flatness. Owing to this capability, the ZRM is utilized in cold steel rolling processing to produce a hard and thin steel strip product with a uniform shape. The outcome is a better quality final strip, with reduced strip tension imbalance, which prevents strip breakage
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
