The entry point to this site. Run or download the software. Elaborate information on the example models. The lumped parameter assumption allows model components that interact through ports. These notions have formed the basis for a number of modeling formalisms.
Bond graphs rely on a small set of basic elements that interact through power bonds .
These bonds are acausal and connect to ports. This introduces a more flexible modeling environment but requires sophisticated model manipulation before a model can be analyzed. A compilation stage flattens the model structure and solves the system equations. Presently, in an international effort the de facto modeling language Modelica is developed. The described formalisms were based on the common continuous description formalism of differential equations.