Application of Repetitive Control to Eccentricity Compensation in Rolling

[+] Author and Article Information
S. S. Garimella

Alcoa Technical Center, Alcoa Center, PA 15069

K. Srinivasan

Mechanical Engineering Department, The Ohio State University, Columbus, OH 43210

J. Dyn. Sys., Meas., Control 118(4), 657-664 (Dec 01, 1996) (8 pages) doi:10.1115/1.2802340 History: Received October 07, 1993; Online December 03, 2007


Repetitive control is applied here to compensate for roll eccentricity disturbances in thickness control of the cold rolling process. A unique aspect of the process is that the eccentricity disturbance may be from multiple rolls and hence may be composed of multiple periodic components whose periods may not be commensurate, namely, divisible by a common factor an integral number of times. The paper presents a multiple-period repetitive controller structure that can compensate for such a disturbance. The structure proposed is also applicable to other tracking and regulation applications involving multiple periodic signals. Procedures to analyze and design control systems with such a structure, to ensure stability and performance, are presented.

Copyright © 1996 by The American Society of Mechanical Engineers
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