Modeling and control of a plastic film manufacturing web process

Hur, Sung-ho and Katebi, R. and Taylor, A. (2010) Modeling and control of a plastic film manufacturing web process. IEEE Transactions on Industrial Informatics, 7 (2). pp. 171-178.

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Abstract

This paper is concerned with the modelling of aplastic film manufacturing process and the development and implementation of a model-based Cross-Directional (CD) controller. The model is derived from first-principles and some empirical relationships. The final validated nonlinear model could provide a useful off-line platform for developing control and monitoring algorithms.A new controller is designed which has a similar structureto that of Internal Model Control (IMC) with the addition ofan observer whose gain is designed to minimise process andmodel mis-match. The observer gain is obtained by solving amulti-objective optimisation problem through the application of a genetic algorithm. The controller is applied to the nonlinear model and simulation results are presented demonstrating improvements that can be achieved by the proposed controller over two existing CD controllers.