Control system for a paper or board machine

G - Physics – 05 – D

Patent

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G05D 5/03 (2006.01) D21F 7/06 (2006.01) D21G 9/00 (2006.01) G01N 33/34 (2006.01)

Patent

CA 2018114

A control system regulating the transverse profile of properties of a web in a paper or board machine is disclosed. The control system comprises a plurality of actuators and a corresponding plurality of actuator controllers. The actuators are arranged to be effective across the width of the web whose profile is to be regulated. Further included is a process controller and a feedback network connected to the process controller and provided with an arrangement for measuring the web profile to be regulated. The actuators are provided with intelligent actuator controllers. A data bus common to the actuator controllers is provided, along which occur data communications in a control hierarchy between a higher control device and said actuator controllers.

L'objet de la présente invention est un système de contrôle assurant la régulation des caractéristiques sous-jacentes au profil transversal d'une bande de matériau dans une machine à papier ou à carton. Le système de contrôle comprend une pluralité d'actionneurs avec leurs contrôleurs respectifs. Les actionneurs sont disposés de manière à agir sur la largeur de la bande dont le profil est régulé. Les actionneurs sont fournis avec des contrôleurs intelligents. Un bus de données commun aux contrôleurs d'actionneurs est prévu et assure la transmission des données suivant une hiérarchie de commande entre un dispositif de commande supérieur et les dits actionneurs de contrôleurs.

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