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Using multi-objective optimization to balance system-level model complexity

Pollok, Alexander and Bender, Daniel (2014) Using multi-objective optimization to balance system-level model complexity. In: ACM International Conference Proceeding Series. 6th International Workshop on Equation-Based Object-Oriented Modeling Languages and Tools, 10. Okt. 2014, Berlin, Deutschland. DOI: 10.1145/2666202.2666213

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Official URL: http://dx.doi.org/10.1145/2666202.2666213

Abstract

Deciding what to include in a model is the essence of physical modeling. If this kind of decisions is done incorrectly, it results in a model that is both less accurate and offers less performance than others. This paper presents a method to deal with these decision problems and quantify the results. A workflow is proposed, where the modeler first builds a model and includes several sets of replaceable subsystems. A multi-objective optimization algorithm then identifies selections of subsystems that are pareto optimal regarding accuracy and computation time. Finally, the modeler can pick one of these selections based on the modeling intent. An implementation of the proposed method using Modelica and Python is presented and potential pitfalls are explained. Special consideration is given to the quantification of the error or distance between models of different structures. The method is then illustrated by the use of two examples, one of them a complex model of an avionics cooling system cold plate. Suggestions are given regarding the embedding of the method into typical modeling workflows by the use of custom annotations.

Item URL in elib:https://elib.dlr.de/92797/
Document Type:Conference or Workshop Item (Speech)
Title:Using multi-objective optimization to balance system-level model complexity
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pollok, Alexanderalexander.pollok (at) dlr.deUNSPECIFIED
Bender, Danieldaniel.bender (at) dlr.deUNSPECIFIED
Date:10 October 2014
Journal or Publication Title:ACM International Conference Proceeding Series
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.1145/2666202.2666213
Status:Published
Keywords:tool, modeling, comparison metric, modelling, workflow, Modelica, pareto
Event Title:6th International Workshop on Equation-Based Object-Oriented Modeling Languages and Tools
Event Location:Berlin, Deutschland
Event Type:Workshop
Event Dates:10. Okt. 2014
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems and Cabin
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of System Dynamics and Control > Aircraft System Dynamics
Deposited By: Pollok, Dipl.-Ing. Alexander
Deposited On:03 Dec 2014 15:22
Last Modified:15 Jul 2019 14:20

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