Authors:
Yohan Éguillon
1
;
Bruno Lacabanne
2
and
Damien Tromeur-Dervout
1
Affiliations:
1
Institut Camille Jordan, Université de Lyon ,UMR5208 CNRS-U.Lyon1, Villeurbanne and France
;
2
Siemens Industry Software, Roanne and France
Keyword(s):
Solver Coupling, Iterative Co-simulation, Rollback, Polynomial Interpolation, Fixed-point Method.
Related
Ontology
Subjects/Areas/Topics:
Application Domains
;
Automotive Industry
;
Collaboration and e-Services
;
Collaborative Systems
;
Complex Systems Modeling and Simulation
;
Computer Simulation Techniques
;
Dynamical Systems Models and Methods
;
e-Business
;
Enterprise Information Systems
;
Formal Methods
;
Hydraulic and Pneumatic Systems
;
Mobile Software and Services
;
Robotics, Automation and Mechatronics
;
Simulation and Modeling
;
Simulation Tools and Platforms
;
Telecommunications
;
Wireless Information Networks and Systems
Abstract:
This paper introduces IFOSMONDI co-simulation algorithm that combines iterative coupling methods and a smooth representation of interface variables. In explicit (i.e. non-iterative) coupling methods, representing smooth interface variables requires the introduction of a delay (Busch, 2016) because the values of the interface variables at the end of a given macro-step are not known when the co-simulation only reached the beginning of this very macro-step. One of the advantages of implicit co-simulation (i.e. iterative coupling methods) is that the values of the interface variables can be known at the end of a macro-step with the possibility to replay the integration on this very macro-step. Combining this with a polynomial representation of the interface variables enables to use interpolation instead of extrapolation across the macro-steps (Kübler and Schiehlen, 2000). Taking into account time-derivatives of interface variables makes it possible to ensure C1 smoothness even with no hi
story of the past exchanged data: then, no delay is introduced. A new possibility then arises: the solvers of each subsystem may take into account this smoothness and be less restrictive on their restarts due to the communication times. The results obtained on the test case of the two mass oscillators (Busch, 2016) show the advantage of IFOSMONDI coupling in terms of trade-off between elapsed time and accuracy.
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