Object Oriented Simulation using Modelica

In this report we present the new standard tool of object oriented simulation, the object oriented programming language Modelica. Modelica is a modern language built on non-casual modeling with mathematical equations and object oriented constructs to facilitate reuse of modeling knowledge. The design of Modelica started in the continuous time domain since there is a common mathematical framework in the form of differential-algebraic equations. We have also studied the modeling and simulation environment Dymola, which is the first simulation environment for the Modelica language. Dymola is a product from the Dynasim company. The report contains an introduction to the Modelica language and its design from a computer science point of view.