Bond graph

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A bond graph is a graphical description of a physical dynamic system. It is an energy-based technique. A bond graph shows the energy flows around a system. Bond graphs have a number of advantages over conventional block diagram or code-based modelling techniques (Gawthrop and Ballance, 1999):

  • They provide a visual representation of the system.
  • Since they work on the principle of conservation of energy, it is difficult to accidentally introduce extra energy into a system.
  • The bonds are symbols which contain meaning.
  • They separate the structure from causality.
  • Since each bond represents a bi-directional flow, systems which produce a 'back force' (e.g. a motor back emf) on the input are easily modelled without introducing extra feedback loops.
  • Hierarchy can be used to manage large system models.

Bond graphs are based on the principle of continuity of power. If the dynamics of the physical system to be modeled operate on widely varying time scales, fast continuous-time behaviors can be modeled as instantaneous phenomena by using a hybrid bond graph.

Contents

[edit] See also

  • AMESim simulation software based on the bond graph theory
  • 20-sim modeling and simulation software for bond graphs

[edit] External links

The above link is out of service for an unknown length of time and until it is in working order a pdf of the information contained there is available at the following location:

[edit] References

  • Amalendu Mukherjee, Ranjit Karmakar (1999): "Modeling and Simulation of Engineering Systems Through Bondgraphs" CRC Press LLC, 2000 N.W. Corporate Blvd., Boca Raton, Florida 33431. ISBN-13: 978-0849309823
  • Gawthrop, P. J. and Ballance, D. J., 1999: "Symbolic computation for manipulation of hierarchical bond graphs" in Symbolic Methods in Control System Analysis and Design, N. Munro (ed), IEE, London, ISBN 0-85296-943-0.

[edit] Further reading

  • Karnopp, D. C., Rosenberg, R. C. and Margolis, D. L., 1990: System dynamics: a unified approach, Wiley, ISBN 0-471-62171-4.
  • Thoma, J., 1975: Bond graphs: introduction and applications, Elsevier Science, ISBN 0-08-018882-6.
  • Gawthrop, P. J. and Smith, L. P. S., 1996: Metamodelling: bond graphs and dynamic systems, Prentice Hall, ISBN 0-13-489824-9.
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