Screening web breaks in a pressroom by soft computing

Authors:
A. Verikas;A. Gelzinis;M. Hållander;M. Bacauskiene;A. Alzghoul
Affiliations:
Department of Electrical & Control Equipment, Kaunas University of Technology, Studentu 50, LT-51368, Kaunas, Lithuania;Department of Electrical & Control Equipment, Kaunas University of Technology, Studentu 50, LT-51368, Kaunas, Lithuania;Intelligent Systems Laboratory, Halmstad University, Box 823, S 301 18 Halmstad, Sweden;Department of Electrical & Control Equipment, Kaunas University of Technology, Studentu 50, LT-51368, Kaunas, Lithuania;Intelligent Systems Laboratory, Halmstad University, Box 823, S 301 18 Halmstad, Sweden
Venue:
Applied Soft Computing
Year:
2011

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Abstract

Abstract: The objective of this work is to identify the main parameters of the printing press, the printing process, and the paper affecting the occurrence of web breaks in a pressroom. Two approaches are explored. The first one treats the problem as a task of data classification into ''break'' and ''non-break'' classes. The procedures of classifier design and selection of relevant input variables are integrated into one process based on genetic search. The second approach, targeted for data visualization and also based on genetic search, combines procedures of input variable selection and data mapping into a two-dimensional space. The genetic search-based analysis has shown that the web tension parameters are amongst the most important ones. It was also found that the group of paper related parameters recorded online contain more information for predicting the occurrence of web breaks than the group of traditional parameters recorded off-line at a paper lab. Using the selected set of parameters, on average, 93.7% of the test set data were classified correctly. The average classification accuracy of web break cases was equal to 76.7%.