A Pre-Step Stabilization Method for Non-Iterative Co-Simulation and Effects of Interface-Jacobians Identification

Simon Genser*, Martin Benedikt

*Korrespondierende/r Autor/-in für diese Arbeit

    Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem KonferenzbandBegutachtung

    Abstract

    Co-Simulation of complex subsystems can lead to stiff problems, where, especially for applied explicit numerical schemes, small communication step sizes are mandatory to obtain stable and accurate results. Due to the utilization of subsystem information, i.e. interface-jacobians or partial derivatives, it is possible to increase the stability and accuracy of the overall co-simulation. The herein proposed co-simulation coupling method therefore performs three major steps: a global approximation of the monolithic solution utilizing an introduced Error Differential Equation; a global model-based extrapolation over the next communication step and, finally, a local pre-step input optimization is carried out for all subsystems. This method is validated along a two degree-of-freedom oscillator benchmark example. As for realistic use cases it is difficult to access interface-jacobians, system identification methods are applied for approximation. Associated interface-jacobian approximation errors are investigated with respect to the performance and especially the stability of the overall co-simulation.
    Originalspracheenglisch
    TitelSimulation and Modeling Methodologies, Technologies and Applications
    UntertitelSIMULTECH 2018
    Seiten101-125
    DOIs
    PublikationsstatusVeröffentlicht - 2019
    Veranstaltung8th International Conference on Simulation and Modeling Methodologies, Technologies and Applications: SIMULTECH 2018 - Porto, Portugal
    Dauer: 29 Juli 201831 Juli 2018
    http://www.simultech.org/

    Publikationsreihe

    NameAdvances in Intelligent Systems and Computing
    Herausgeber (Verlag)Springer Verlag
    Band947
    ISSN (Print)2194-5357

    Konferenz

    Konferenz8th International Conference on Simulation and Modeling Methodologies, Technologies and Applications
    KurztitelSIMULTECH 2018
    Land/GebietPortugal
    OrtPorto
    Zeitraum29/07/1831/07/18
    Internetadresse

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