Modelling is not an art, it is absolutely possible to identify patterns, which can be generalised yielding a highly structured modelling methodology. Over the last years we have proven the effectiveness of the approach in industrial application and education. Since the last version of the modelling software Modeller has been publicised on the basis of which the high-tech company Mobatech has been established in the Netherlands, the project has progressed further and expands now into model reduction, thus enabling multi-scale modelling.

Presentation

The basic approach is presented extending on the handling of large-scale systems. This is then augmented with the associated mathematical representation of the plant as it is represented in the current theory definition component of the program environment. The discussion is extended to the mathematical background of the model assumption tool, which enables three types of order of magnitude assumptions all of which have an effect on the structure of the problem. Changing the structure changes the structure of the mathematical representation, which in turn often implies mathematical problems in the resulting equation structure. These problems have been identified and will be briefly discusses as well as the resolution of the problem. In all cases the result is a reduced model, thus the developed methodologies can be used for model reduction thus resulting in models characterized by a larger granularity. Change of granularity also implies a different time scale.

Recent Project-Related References:

1. Preisig, H A;Modelling: Compartmental Networks and Topologies - A Comparison with Bond Graphs;ESCAPE 14 (2004), Lisabon, Portugal, 16-19/05/2004, pp 1111-1116;2004

2. Preisig, H A;A Topology Approach to Modelling;SIMS 45, Copenhagen, Danmark, 24-25/09/2004; pp 413-420;2004

3. Preisig, H A & Westerweele, M R;Modeller--An interactive model editor for physical-chemical-biological models;FOCAPO 2003, Coral Springs, Florida, USA, 12-15 Jan 2003, paper 92; pp 531-534;2004

4. Preisig, H A;Gymnastic Exercises with Topologies Relating to Time-Scale Assumptions;ESCAPE 14 (2004), Lisabon, Portugal, 16-19/05/2004, pp 1105-1110;2004;

5. Preisig, H A;Computer-aided modelling: A study on the dynamic flash;ESCAPE 15 (2005), Barcelona, Spain, 29/6 - 1/6;2005

6. Preisig, H A & Haug-Warberg, T & Loevall, B T;On model portability;ESCAPE 16 / PSE 9, Garmisch-Partenkirchen, Germany; pp 483;2006

7. Preisig, H A;A Graph-Theory-Based Approach to the Analysis of Large-Scale Plants;ESCAPE 17, Bucharest, Rumenia, 2007/05/27-30; pp 81-86;2007

8. Preisig H A;Three Principle Model Reductions Based on Time-Scale Considerations;ESCAPE 18; Lyon, France; 2008/06/2-4;2008