System for overall control of different transverse profiles in a

Details System for overall control of different transverse profiles in a System for overall control of different transverse profiles in a

1995-05-12

1997-07-22

Chilcot, Richard

Measuring and testing

Sheet, woven fabric or fiber

73862451, G01L 504

Patent

active

056494483

ABSTRACT:
A method for controlling transverse profiles of a web in a web-manufacturing machine, such as a board or paper machine, and/or being treated in a finishing machine. At least one of a transverse caliper, grammage and moisture profiles of the web is measured either directly or indirectly. Actuators acting upon these profiles are regulated by measurement signals. In order to optimize the quality of the web to be produced, the reel formation, and the runnability of the machine, the transverse tension profile of the web to be manufactured and/or treated is measured. Based on the measurement of the transverse tension profile, set profiles are formed which control the actuator(s) of the profile regulation.

REFERENCES:
patent: 5052233 (1991-10-01), Rantala
Mustonen H., Ritala R.: "Coordination of Cross Direction Controls", Proceedings of Control Systems 1992 Conference, pp. 217-271, 1992.
Mustonen, H., Koskinen K., Ritala R., Valtonen E.: Poikkisuunnan laatuvaihteluiden kokonaishallinta, KCL:n seloste 2063, (Overall control of cross direction quality variations, KCL report 2063) 1993.

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