Title :
Application of a new automatic gauge control system for the tandem cold mill
Author :
Tezuka, T. ; Yamashita, T. ; Sato, T. ; Abiko, Y. ; Kanai, T. ; Sawada, M.
Author_Institution :
Power & Ind. Syst. R&D Center, Toshiba Corp., Tokyo, Japan
Abstract :
In July 2000, a new automatic gauge control (AGC) system was successfully installed at Kobe Steel´s Kakogawa works. The new AGC system consists of two functions: multivariable AGC based on mass flow thickness and roll eccentricity control. The multivariable AGC is designed using ILQ (inverse linear quadratic) theory, a type of optimal control theory, and controls both thickness and tension. Repetitive control theory is applied to roll eccentricity control as roll eccentricity is a periodic disturbance related to the rotational angle of the rolls. The new AGC system has contributed to improved thickness accuracy and stable rolling. In this paper, details of the new AGC system are described and the application results are shown.
Keywords :
cold rolling; mechanical variables control; multivariable control systems; optimal control; rolling mills; steel industry; thickness control; Kakogawa works; Kobe Steel; automatic gauge control system; inverse linear quadratic theory; mass flow thickness control; multivariable AGC; optimal control theory; periodic disturbance; repetitive control theory; roll eccentricity control; rotational angle; stable rolling; tandem cold mill; tension control; Automatic control; Control systems; Fluctuations; Industrial control; Milling machines; Optimal control; Steel; Strips; Thickness control; Weight control;
Conference_Titel :
Industry Applications Conference, 2001. Thirty-Sixth IAS Annual Meeting. Conference Record of the 2001 IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-7114-3
DOI :
10.1109/IAS.2001.955567
