Practical Identification of Systems with Nonlinearities

摘要

The practical aspects of identifying nonlinear systems are discussed using the identification of a heat exchanger. Methods of determining if the system is linear or nonlinear prior to parameter estimation are illustrated. Techniques for estimating the unknown parameters in a nonlinear difference equation model are discussed and the application of model validity tests which detect the existence of unmodeled linear or nonlinear terms in the residuals are demonstrated.