METHOD FOR MODELING TWO-DIMENSIONAL RESPONSES OF CROSS-MACHINE DIRECTION ACTUATORS IN SHEET-FORMING PROCESSES

摘要

A plurality of random probing sequences are used to perturb a corresponding plurality of CD actuators of a web manufacturing machine. The web of sheet material is measured as the CD actuators are perturbed. The global process MD dynamics is estimated and a CD response is estimated for each of the plurality of CD actuators using the plurality of random probing sequences, measurements of the web of sheet material and the estimated global process MD dynamics. The estimated global process MD dynamics and the estimated CD responses form 2D responses for the plurality of CD actuators. Through appropriate processing a family of probable CD responses are generated within the variation bounds and a most probable response is selected from the family of probable responses for each CD actuator response. The CD response for each CD actuator is replaced with the most probable response shifted by an appropriate amount for each CD actuator and multiplied by an optimal gain.