Roll Force AWC and RHC Tension Control in Hot Strip Mills

Author

Park, Cheol Jae ; Hwang, I. Cheol

Author_Institution

Tech. Res. Lab., POSCO, Pohang

fYear

2007

fDate

1-3 Oct. 2007

Firstpage

688

Lastpage

693

Abstract

This paper proposes a new width control system composed of a RF (roll force) AWC (automatic width control) in the roughing mill and a RHC (receding horizon control) with a 4SID (subspace-based state space system identification) model identifier. The RF AWC is designed by the control model on the basis of a gauge meter equation using the roll force of a vertical mill. The RHC is employed to satisfy the constraints on the control input/state, guarantee the stability, and attenuate the effect of the disturbances. It is shown through the field test of the Pohang no.1 hot strip mill of POSCO that the width margin is considerably improved by the proposed control scheme.

Keywords

hot rolling; mechanical variables control; rolling mills; size control; strips; gauge meter equation; hot strip mills; receding horizon control; roll force automatic width control; subspace-based state space system identification; tension control; vertical mill; Automatic control; Control system synthesis; Equations; Force control; Milling machines; Radio frequency; Radiofrequency identification; State-space methods; Strips; System identification;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Applications, 2007. CCA 2007. IEEE International Conference on

Conference_Location

Singapore

Print_ISBN

978-1-4244-0442-1

Electronic_ISBN

978-1-4244-0443-8

Type

conf

DOI

10.1109/CCA.2007.4389312

Filename

4389312