Caliper profile control system for paper machine providing reduc

Details Caliper profile control system for paper machine providing reduc Caliper profile control system for paper machine providing reduc

1994-11-10

1996-12-10

Envall, Jr., Roy N.

Boots, shoes, and leggings

100 50, 36446901, G06F 1900

Patent

active

055837824

ABSTRACT:
A caliper profile control system for a paper machine provides reduced start up times after sheet breaks to bring the caliper profile across the sheet to within the desired limits. The method comprises the steps of scanning at predetermined intervals across the width of the paper sheet to monitor thickness error of the sheet from predetermined limits and change in the thickness error between the intervals, in each of a plurality of zones across the sheet. A control change signal is determined for each of the zones based on the error and the change in error using an exponential function of the magnitude of the error to maximize the change in the error and reduce integral action when the error is large. The control signal is used to reduce the error in each zone and the integral action is increased as the error decreases until the predetermined limits are met.

REFERENCES:
patent: 4114528 (1978-09-01), Walker
patent: 4680089 (1987-07-01), Aral et al.
patent: 4707779 (1987-11-01), Hu
patent: 4903528 (1990-02-01), Balakrishnan et al.
patent: 4947684 (1990-08-01), Balakrishnan
patent: 4965736 (1990-10-01), Balakrishnan
patent: 4982334 (1991-01-01), Balakrishnan
patent: 5121332 (1992-06-01), Balakrishnan et al.
patent: 5170357 (1992-12-01), Sasaki et al.
patent: 5298122 (1994-03-01), Munch et al.

Affiliated with

Also associated with

Rating

Caliper profile control system for paper machine providing reduc does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Caliper profile control system for paper machine providing reduc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Caliper profile control system for paper machine providing reduc will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-429186