TOOLS FOR SEMIPHYSICAL MODELING

Semiphysical modelling is often interpreted as an application of syste m identification where physical insight into the application is used t o come up with suitable non-linear transformations of the raw measurem ents so as to allow for a good model structure. This modelling procedu re is less 'ambitious' than those used for traditional physical modell ing in that no complete physical structure is sought, just suitable in puts and outputs that can be subjected to more or less standard model structures such as linear regressions. In this paper we discuss a semi physical modelling procedure and various tools supporting it. These in clude constructive algorithms originating from commutative and differe ntial algebra as well as more informal tools such as the programming e nvironment.