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Identification and Cross-Directional Control of Coating Processes: Theory and Experiments

Braatz, Richard D. and Tyler, Matthew L. and Morari, Manfred and Pranckh, Ferdinand R. and Sartor, Luigi (1992) Identification and Cross-Directional Control of Coating Processes: Theory and Experiments. In: 1992 American Control Conference. IEEE , Piscataway, NJ, pp. 1556-1561. ISBN 0-7803-0210-9.

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Of special industrial interest is the cross-directional control of continuous coating processes, where the cross-direction refers to the direction perpendicular to the substrate movement. The objective of the controller is to maintain a uniform coating under unmeasured process disturbances based on assumptions relevant to coating processes found in industry. A model for control design is developed. This model is used to derive a model predictive controller with the objective of maintaining flat profiles of coating across the substrate by varying the liquid flows along the cross direction. Actuator constraints, measurement noise, and model uncertainty are investigated to determine which of these limit the achivable closed loop performance. From a knowledge of the effect of these limitations on performance we determine how the plant could be modified to improve the coating uniformity. The theory developed throughout the paper is rigorously verified though experiments on an industrial pilot plant.

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Additional Information:© 1992 IEEE. supported by the Fannie and John Hertz Foundation.
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Fannie and John Hertz FoundationUNSPECIFIED
Record Number:CaltechAUTHORS:20170613-172633659
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Official Citation:R. D. Braatz, M. L. Tyler, M. Morari, F. R. Pranckh and L. Sartor, "Identification and Cross-Directional Control of Coating Processes: Theory and Experiments," 1992 American Control Conference, Chicago, IL, USA, 1992, pp. 1556-1561. doi: 10.1002/aic.690380903
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78183
Deposited On:14 Jun 2017 02:29
Last Modified:03 Oct 2019 18:06

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