Abstract This paper is concerned with the topic of the reduction of thermal models of spacecraft. The work presented here has been conducted in cooperation with the company OHB AG, formerly Kayser-Threde GmbH, and the Institute of Astronautics at Technische Universität München with the goal to shorten and automatize the time-consuming and manual process of thermal model reduction. The reduction of thermal models can be divided into the simplification of the geometry model for calculation of external heat flows and radiative couplings and into the reduction of the underlying mathematical model. For simplification a method has been developed which approximates the reduced geometry model with the help of an optimization algorithm. Different linear and nonlinear model reduction techniques have been evaluated for their applicability in reduction of the mathematical model. Thereby the compatibility with the thermal analysis tool ESATAN-TMS is of major concern, which restricts the useful application of these methods. Additional model reduction methods have been developed, which account to these constraints. The Matrix Reduction method allows the approximation of the differential equation to reference values exactly expect for numerical errors. The summation method enables a useful, applicable reduction of thermal models that can be used in industry. In this work a framework for model reduction of thermal models has been created, which can be used together with a newly developed graphical user interface for the reduction of thermal models in industry.

    Highlights The compatibility with the thermal analysis tool ESATAN-TMS is of major concern. Global optimization algorithm optimizes boundary conditions of reduced models. Developed matrix-based reduction method optimally reduces time-variant models. Developed summation method is applicable in industry.


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    Titel :

    Development and evaluation of thermal model reduction algorithms for spacecraft


    Beteiligte:
    Deiml, Michael (Autor:in) / Suderland, Martin (Autor:in) / Reiss, Philipp (Autor:in) / Czupalla, Markus (Autor:in)

    Erschienen in:

    Acta Astronautica ; 110 ; 168-179


    Erscheinungsdatum :

    2015-01-28


    Format / Umfang :

    12 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch






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