StateGraph-A Modelica Library for Hierarchical State Machines

The new library Modelica.StateGraph is a freeModelica package providing components to modeldiscrete event and reactive systems in a convenientway. It has a similar modeling power as Statecharts,but avoids some deficiencies of Statecharts by usingelements of JGrafchart and by using Modelica as an“action” language. An overview of the StateGraphlibrary is given, the available components and anapplication example. The implementation of thelibrary in Modelica is sketched, especially theneeded extension to Modelica that will be availablein release 2.2 of the Modelica language