Automated identification of web shrinkage and alignment paramete

Details Automated identification of web shrinkage and alignment paramete Automated identification of web shrinkage and alignment paramete

1996-10-18

2000-07-11

Grant, William

Boots, shoes, and leggings

36447102, 36447103, 3644701, G06F 1900, G06G 764, G06G 766

Patent

active

060862378

ABSTRACT:
A process for determining shrinkage and alignment of the web in a sheetmaking machine having a plurality of actuators for controlling web parameters in the cross-direction. The process involves the steps of applying excitation to the actuators, collecting data regarding the change in cross-direction web properties due to the excitation of the actuators to determine a measured actuator response profile. A modeled actuator response profile is established and a best fit of the modeled actuator response profile to the measured actuator response profile is established to allow for determination of alignment and shrinkage parameters of the web based on the best fit modeled actuator response profile. The foregoing approach permits reliable identification of alignment and shrinkage within 10-20 data scans of the web, despite process noise, with improved accuracy when compared with conventional "bump" tests.

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Dimitry Gorinevsky, Michael Heaven et al, Measurex Devron Inc., Automated Identification of Web Shrinkage and Alignment in Paper and Film Machines, IEEE Int. Conf. on Systems Man and Cybernetics, Oct. 1995, Vancouver, B.C., pp. 1-6.

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