A Survey of the Looper-Tension Control Technology in Hot Rolling Mills
| Authors: | Choi Il Seop, The University of Sheffield, United Kingdom
Rossiter Anthony, The University of Sheffield, United Kingdom
Fleming Peter, The University of Sheffield, United Kingdom |
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| Topic: | 6.2 Mining, Mineral & Metal Processing |
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| Session: | Hot Rolling |
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| Keywords: | Conventional PI control, observer-based control, Inernal model control, H-infinity control, Model predictive control |
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Abstract
Looper and tension control is important in hot strip mills because it affects the strip quality as well as strip threading. Moreover, the most difficult challange in the controller design and control performance comes from the interaction between looper angle and strip tension. Disturbances from several sources also cause a deterioration in control performance, and thus they should be rejected effectively by proper control algorithms. Up to now, various kinds of control schemes have been proposed and applied to this control problem. Recently nevertheless, strict demand for strip quality by the market has required improved approaches to this control area. This paper investigates strong and weak points of various control algorithms proposed in academia as well as industry. It also explores the potential offuture technology in this area.
