Article | Proceedings of the 10<sup>th</sup> International Modelica Conference; March 10-12; 2014; Lund; Sweden | Modelica extensions for Multi-Mode DAE Systems
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Title:
Modelica extensions for Multi-Mode DAE Systems
Author:
Hilding Elmqvist: Dassault Systèmes AB, Ideon Science Park, Lund, Sweden Sven Erik Matsson: Dassault Systèmes AB, Ideon Science Park, Lund, Sweden Martin Otter: German Aerospace Center (DLR), Institute of System Dynamics and Control, Wessling, Germany
DOI:
10.3384/ecp14096183
Download:
Full text (pdf)
Year:
2014
Conference:
Proceedings of the 10th International Modelica Conference; March 10-12; 2014; Lund; Sweden
Issue:
096
Article no.:
019
Pages:
183-193
No. of pages:
11
Publication type:
Abstract and Fulltext
Published:
2014-03-10
ISBN:
978-91-7519-380-9
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press; Linköpings universitet


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This paper describes a proposal for modeling systems with multiple operating modes; such as changing a controller from nominal operation to startup or shutdown or describing failure situations where the model structure is changing (e.g. an electrical line or a mechanical shaft breaks). This is achieved by extending the Modelica 3.3 synchronous state machines to continuous-time state machines having continuous-time models as ‚Äústates‚ÄĚ. Every model can be a ‚Äústate‚ÄĚ of a state machine; and in particular certain acausal models. Currently; no new language element is needed for Modelica; but a generalized semantics for State Machines has to be introduced; such as ‚Äúmerge semantics for differential equations‚Äú. Symbolic transformations are still handled during translation; so the generated code is efficient and there is no run-time interpreter. On the other; this feature restricts the class of multi-mode systems that can be handled.

Keywords: Multi-mode; failure simulation; dynamically changing states; continuous-time state machine; hybrid state machine.

Proceedings of the 10th International Modelica Conference; March 10-12; 2014; Lund; Sweden

Author:
Hilding Elmqvist, Sven Erik Matsson, Martin Otter
Title:
Modelica extensions for Multi-Mode DAE Systems
DOI:
http://dx.doi.org/10.3384/ecp14096183
References:

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Proceedings of the 10th International Modelica Conference; March 10-12; 2014; Lund; Sweden

Author:
Hilding Elmqvist, Sven Erik Matsson, Martin Otter
Title:
Modelica extensions for Multi-Mode DAE Systems
DOI:
http://dx.doi.org/10.3384/ecp14096183
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