Model based control of the kappa number in the pulp cooking process

Due to the lack of appropriate industrial sensors for online Kappa measurements, Kappa can be determined only after a batch is over by means of analysis in the laboratory. In view of this, a model-based system is developed with the purpose of estimating and controlling Kappa online. A survey is presented of some relevant design issues such as model simplification, approximate parameter estimation, and minimum variance Kappa control. The efficiency of the proposed scheme is illustrated by means of the simulated examples and the results of practical implementation.