Modeling, Calibration and Control of a Paper Machine Dryer Section

Following increased efforts during the last decade to formulate mathematical models for the paper dry-ing process, this paper presents a Modelica library, DryLib, which enables users to rapidly develop com-plex models of paper machine dryer sections. In ad-dition, parameter optimization, model reduction and moisture control by means of Non-Linear Model Pre-dictive Control is treated. These applications have in common that they are based on numerical optimization schemes. Since the nature of the particular optimiza-tion problem dictates the requirements of the numeri-cal code, the paper also serves as an illustration of the need for flexibility in terms of i) means for the user to express optimization problems, ii) and choice of nu-merical algorithms