Method and device for determining the effect of the...

D - Textiles – Paper – 21 – G

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D21G 9/00 (2006.01)

Patent

CA 2210200

Disclosed is a process for determining the effect of an adjustment of final control elements used in the manufacture of a material web, said control elements being distributed over the web width and influencing the web characteristics. The process is characterised in that: when at least one of the final control elements is adjusted, a prediction on the effect of the adjustment is made on the basis of known values via the behaviour of the web characteristics-cross section as the control elements are adjusted; at least one web characteristics-cross section is measured before and after adjustment of the control elements; the prediction on the effect of the control element adjustments is compared to the measured effect; the current known values are adjusted until a better match is obtained between the predicted and measured effects.

L'invention concerne un procédé pour déterminer l'effet du réglage d'actionneurs utilisés dans la fabrication d'une bande de matériau, répartis sur la largeur de la bande et agissant sur les caractéristiques de la bande de matériau. Selon ce procédé, on fait des prévisions, lors du réglage d'au moins un actionneur, sur l'effet dudit réglage sur la base de valeurs connues relatives au comportement du profil transversal des caractéristiques de la bande en cas de modification des actionneurs, en ce qu'au moins un profil transversal des caractéristiques de la bande est mesuré avant et après ledit réglage, en ce que les effets prévisibles des réglages sont comparés à l'effet mesuré, en ce que les valeurs connues existantes sont modifiées jusqu'à obtention d'une meilleure concordance entre l'effet prévisible et l'effet mesuré.

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