BOND-GRAPH MODELING IN MODELICA ™
Johannes F. Broenink · University of Twente Research Information · 1997
This paper discusses a bond–graph model library implemented in Modelica. Modelica is a new language for physical systems modeling with main objective to facilitate exchange of models and simulation specifications. Bond graphs are a domain–independent way of modeling the dynamics of physical systems. Besides the presentation of the Modelica basic bond– graph library, also an application example is discussed, to test the usefulness of the library in practice. The translation of existing bond–graph models to Modelica was a straightforward process, indicating that Modelica has the proper features for bond–graph modeling. However, the implicitly generated sum–to–zero connection equations are not useful for bond–graph modeling and in fact can obscure model specification in Modelica. Our future aim is to build a Modelica import / export facility for our bond–graph / block–diagram modeling and simulation software 20-SIM. Keywords: Object–oriented modeling, Bond graphs, Continuous languages, Control systems.