Model-based fault monitoring of a plastic film extrusion process

S.-H. Hur; R. Katebi; A. Taylor

Model-based fault monitoring of a plastic film extrusion process

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Model-based fault monitoring of a plastic film extrusion process

Author(s): S.-H. Hur ; R. Katebi ; A. Taylor
DOI: 10.1049/iet-cta.2010.0557

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Author(s): S.-H. Hur ¹ ; R. Katebi ¹ ; A. Taylor ²
- Affiliations: 1: Industrial Control Centre, Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow, UK
  2: Industrial Control Centre, Department of Electronic and Electrical Engineering, DuPont Teijin Films UK Ltd, Drungans, UK
Source: Volume 5, Issue 18, 8 December 2011, p. 2075 – 2088
DOI: 10.1049/iet-cta.2010.0557 , Print ISSN 1751-8644, Online ISSN 1751-8652

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This study reports the modelling of a plastic film extrusion process and the development and implementation of a model-based fault monitoring system. The model is mainly derived from the first-principles of chemical and mechanical engineering in addition to empirical knowledge related to the behaviour of polymer and designed to provide a safe offline platform for developing monitoring and control systems. The fault monitoring system constructs a residual via parity relations, and a multi-objective optimisation problem must therefore be solved in order that the residual can be sensitive to faults but insensitive to disturbances and modelling errors. In this study, a genetic algorithm is exploited for solving this multi-objective optimisation problem, and the resulting fault monitoring system is applied to the model. Simulation results demonstrate that various types of faults can be detected and diagnosed successfully.

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