NDLI: Nonlinear control in rolling mills: a new perspective

Content Provider	IEEE Xplore Digital Library
Author	Kugi, A. Schlacher, K. Novak, R.
Copyright Year	1972
Abstract	This paper is concerned with the application of modern nonlinear control techniques to the thickness control in rolling mills. It turns out that the performance of the closed loop can be significantly improved by taking into account the essential nonlinearities of the plant to be controlled already in the controller design. These nonlinear control strategies totally differ from the common approach of linearizing the nonlinear system around a nominal operating point, because they are not limited to a more or less small neighborhood of the operating point, but are valid all over the operating range. Practically, these nonlinear control concepts are a possible answer to the trend of modern rolling mills toward tighter thickness tolerances, thinner final strip thicknesses, faster production rates and shorter off-gauge lengths. However, a straightforward application of the well established nonlinear control theory does not always lead to a control concept that is practically feasible. It is rather unavoidable to consider all the special features and properties of the plant. By means of the gap control of a mill stand with a hydraulic positioning system, the authors show in detail the advantages of a nonlinear control approach. Finally, simulation and measurement results demonstrate the feasibility and the excellent performance of the proposed design.
Sponsorship	IEEE Industry Applications Society
Starting Page	1394
Ending Page	1402
Page Count	9
File Size	212661
File Format	PDF
ISSN	00939994
Volume Number	37
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Milling machines Thickness control Nonlinear control systems Control systems Automatic control Control nonlinearities Nonlinear systems Strips Production Control theory
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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