Abstract: A method for drawing glass objects from glass feedstock, wherein a dimension of the glass object is measured on-line and controlled by a control structure which compensates for the deadtime between a change to the drawing speed and the measurement of the effect of that change to the measured dimension. The model which compensates for the deadtime is preferably nonlinear, and the control gains and model parameters are preferably continuously calculated during the drawing process. The invention is particularly applicable to drawing optical waveguide cane from optical waveguide preforms.
Type:
Grant
Filed:
December 31, 1992
Date of Patent:
May 24, 1994
Assignee:
Corning Incorporated
Inventors:
David M. Koening, Peter J. Majestic, Richard O. Maschmeyer