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Active scanner control on paper machines

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Pages (from-to)74-90
Number of pages17
JournalJournal of Process Control
Volume72
DOIs
Publication statusPublished - 1 Dec 2018
Publication typeA1 Journal article-refereed

Abstract

The cross-directional (CD) basis weight control on paper machines is improved by optimizing the path of the scanning measurement. The optimal path results from an LQG problem and depends on how the uncertainty of the present estimate of the basis weight and the intensity of process noise vary in CD. These factors are assessed by how accurately the CD basis weight estimate predicts the measured optical transmittance with a linear adaptive model on synchronized basis weight and transmittance data. Simulations on optimized scanner path in disturbance scenarios are presented, and the practical implementation of scanner control is discussed.

Keywords

  • basis weight, linear-quadratic-Gaussian, optimal measurement, paper machine, scanner, transmittance, variance estimation, web-wide measurement

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