Realization-preserving model reduction of object-oriented models using energy-based metrics. (July 2019)

• Record Type: Journal Article
• Authors: Sodja, Anton; Škrjanc, Igor; Zupančič, Borut
• Is Part Of: Simulation. Volume 95:Number 7(2019)
• Page Start: 607
• Page End: 620
• Publication Date: 2019-07
• Subjects: Object-oriented modeling -- model simplification -- realization-preserving modeling -- model reduction -- energy-based ranking metrics -- Modelica; Computer simulation -- Periodicals; 003.3
• DOI: 10.1177/0037549718815338
• Languages: English
• ISSNs: 0037-5497

Abstract

This paper deals with the adaptation of energy-based realization-preserving model-reduction techniques for object-oriented models implemented in Modelica. An approach originally developed for bond graphs, where energy-related heuristics were used to identify the components contributing the most to the model's salient dynamics, was extended to more heterogeneously formulated models in Modelica. A prototype toolbox was developed inside the modeling environment OpenModelica. Its applicability was demonstrated with two examples. Although the model-reduction tool cannot reduce the model completely automatically, it may still offer many useful insights and hints to the user.