GREY-BOX IDENTIFICATION OF THE CONTINUOUS DIGESTER

The grey-box modeling technique is employed for identification of a mo del of the continuous digester. A physically-based model is complement ed with empirical data to produce a model with quantitative prediction capabilities. The method of orthogonal collocation is utilized to red uce this infinite dimensional system into a finite dimensional state s pace approximation. A grey-box identification session, including diffe rent sources for process disturbances, shows that new insight into the process behavior can be gained by this approach.