.Modelica.StateGraph.UsersGuide.ComparisonWithStateGraph2

Information

An evolved, but non-standard conforming Modelica library, called "Modelica_StateGraph2", is available from https://github.com/HansOlsson/Modelica_StateGraph2. Find below a comparison with respect to Modelica.StateGraph. A third option, especially for modeling of discrete controllers, are the clocked state machines, which are available as built-in Modelica language elements, see Section 17 (State Machines) of the Modelica 3.4 specification.

The Modelica_StateGraph2 library (called StateGraph2 below) is based on the experience with the current Modelica.StateGraph library (called StateGraph1 below) and is a significantly further development of StateGraph1. Furthermore, it is heavily based on the article (Malmheden et. al. 2008), see Literature below, but uses a different implementation technique as described in this article. The StateGraph2 library has the following improvements with respect to the StateGraph1 library:

Literature

The Modelica_StateGraph2 library is described in detail in (Otter et. al. 2009, see below) and is additionally based on the following references:

André, C. (2003):
Semantics of S.S.M (Safe State Machine). I3S Laboratory, UMR 6070 University of Nice-Sophia Antipolis / CNRS.
 
Årzén K.-E. (2004):
JGrafchart User Manual. Version 1.5. Department of Automatic Control, Lund Institute of Technology, Lund, Sweden, Feb. 13, 2004.
 
Dressler I. (2004):
Code Generation From JGrafchart to Modelica. Master thesis, supervisor: Karl-Erik Årzén, Department of Automatic Control, Lund Institute of Technology, Lund, Sweden, March 30, 2004.
 
Elmqvist H., Mattsson S.E., Otter M. (2001):
Object-Oriented and Hybrid Modeling in Modelica. Journal Europeen des systemes automatises (JESA), Volume 35 - n. 1, 2001.
 
Harel, D. (1987):
A Visual Formalism for Complex Systems. Science of Computer Programming 8, 231-274. Department of Applied Mathematics, The Weizmann Institute of Science, Rehovot, Israel.
 
Malmheden M. (2007):
ModeGraph - A Mode-Automata-Based Modelica Library for Embedded Control. Master thesis, Department of Automatic Control, Lund University, Sweden.
 
Malmheden M., Elmqvist H., Mattsson S.E., Henrisson D., Otter M. (2008):
ModeGraph - A Modelica Library for Embedded Control based on Mode-Automata. Modelica'2008 Conference, March 3-4, 2008.
 
Maraninchi F., Rémond, Y. (2002):
Mode-Automata: A New Domain-Specific Construct for the Development of Safe Critical Systems.
 
Mosterman P., Otter M., Elmqvist H. (1998):
Modeling Petri Nets as Local Constraint Equations for Hybrid Systems using Modelica. SCSC'98, Reno, Nevada, USA, Society for Computer Simulation International, pp. 314-319, 1998.
 
Otter M., Malmheden M., Elmqvist H., Mattsson S.E., Johnsson C. (2009):
A New Formalism for Modeling of Reactive and Hybrid Systems. Modelica'2009 Conference, Como, Italy, Sept. 20-22, 2009.

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