METHOD AND APPARATUS FOR INTERNAL MODEL CONTROL USING A STATE VARIABLE FEEDBACK SIGNAL

The present invention relates generally to the control of processes which include relatively long time delays, yet which are susceptible to transient external disturbances, such as high-speed sheetmaking processes. Exemplary embodiments include a control system architecture that combines internal model-based control with state feedback in a manner which provides robust control, yet provides rapid rejection of external transient disturbances even in processes including relatively long time delays.