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Discrete-time models for control applications with FMI

Rüdiger, Franke and Mattsson, Sven Erik and Otter, Martin and Wernersson, Karl and Olsson, Hans and Ochel, Lennart and Blochwitz, Torsten (2017) Discrete-time models for control applications with FMI. In: Proceedings of the 12th international Modelica Conference. Linköping University Electronic Press. 12th International Modelica Conference, 15.-17. Mai 2017, Prag, Tschechische Republik. doi: 10.3384/ecp17132507.

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Official URL: https://doi.org/10.3384/ecp17132507


The paper proposes an extension of FMI 2.0 for the rigorous treatment of discrete-time models. This includes the introduction of discrete-time states, the declaration of clocks in the model description and an extension of the calling interface for the external activation of clocks by an importing environment. The synchronous discrete-time extension enables for the first time the synchronization of FMUs with the environment and with other FMUs. It specializes the existing generic event mechanism of FMI 2.0 and maps to synchronous features of Modelica. Discrete-time FMUs are needed for the generation of controller code from functional models. This paper outlines different use cases, including a simple PI controller, feed forward control with a nonlinear inverse model and nonlinear model predictive control. The FMI change proposal FCP-001 and the Modelica change proposal MCP-0024 describe the proposed extensions in more detail. Test implementations exist in the simulation tools Dymola and OpenModelica and in the importing optimization solver HQP. The use cases given in this paper served for further refinement of the change proposals and the test implementations.

Item URL in elib:https://elib.dlr.de/117426/
Document Type:Conference or Workshop Item (Speech)
Title:Discrete-time models for control applications with FMI
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Mattsson, Sven ErikDynasim AB, LundUNSPECIFIED
Otter, MartinMartin.Otter (at) dlr.deUNSPECIFIED
Wernersson, KarlDassault Systèmes ABUNSPECIFIED
Olsson, HansDassault Systems ABUNSPECIFIED
Journal or Publication Title:Proceedings of the 12th international Modelica Conference
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.3384/ecp17132507
Publisher:Linköping University Electronic Press
Series Name:Linköping Electronic Conference Proceedings
Keywords:Modelica Synchonous modeling Inline Integration Model-based Control Nonlinear Inverse Model Feed Forward Control NMPC
Event Title:12th International Modelica Conference
Event Location:Prag, Tschechische Republik
Event Type:international Conference
Event Dates:15.-17. Mai 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Fahrzeugintelligenz (old), R - Vorhaben Intelligente Mobilität (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of System Dynamics and Control > Leitungsbereich SR
Deposited By: Klauer, Monika
Deposited On:18 Dec 2017 10:41
Last Modified:31 Jul 2019 20:14

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