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Fault detection in hot steel rolling using neural networks and multivariate statistics

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4 Author(s)
Bissessur, Y. ; Centre for Process Anal. & Control Technol., Newcastle upon Tyne Univ., UK ; Martin, E.B. ; Morris, A.J. ; Kitson, P.

The paper addresses the issue of maintaining consistent high quality production in the steel industry by extending techniques emanating from the fields of neural networks and multivariate statistics. Process diagnostic methodologies based on these tools were developed and applied to a six-stand hot rolling mill. The objective was to achieve better mill setup parameters so that the manufactured coils consistently meet the required customer specifications. A wavelet neural network was successfully used for modelling the mill parameters and for detecting errors in the rolling stand settings. Model prediction accuracy and robustness were enhanced through stacked generalisation. Multivariate statistical performance monitoring techniques were then applied on top of the mill control systems to provide early warning of strips being badly rolled. Both approaches yielded comparable results on monitored data from a hot strip mill and, in combination, provided enhanced manufacturing performance

Published in:

Control Theory and Applications, IEE Proceedings -  (Volume:147 ,  Issue: 6 )