Patent ID: 6094604
Filing Date: 2000-07-25
Classification: D21G,G05B

Abstract:
A method for controlling the properties of a sheet of material to be manufactured on a sheet making machine that includes actuators to control the sheet properties comprising the steps of:a) measuring and acquiring properties data about the properties of the sheet of material;b) communicating the measured properties data as soon as the data becomes available to all the actuators;c) calculating and implementing a control action for each actuator using a control model of each actuator's influence on the properties of the sheet so as to minimize the variation of the measured properties data from a desired target;d) communicating the control action made at an actuator and the predicted changes in the measured properties based on the control model to all the actuators; ande) coordinating the control actions of all actuators such that the actuators co-operate to minimize the variation of the measured properties data from desired targets.