Abstract

In this paper principles of model structure determination by selection between candidate structures of underlying linearized ordinary differential equation models aredescribed. The principles are exemplified on a simple heat pump system. The identification procedure applying influence graph models, qualitative prediction tables taking results on structural stability analysis into account, is demonstrated for the example. The same methodology may be applied using other qualitative structural properties (e.g. qualitative correlation tables, structural observability and controllability analysis etc.) Structure identification methods based on qualitative models may complement conventional identification methods serving as structure determination tools in the early stages of modelling.

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