This paper proposes a novel method for an automatic operational modal analysis. An available finite element structural model is used together with sensor data to derive a linear representation of the system, characterized by a set of mode shapes. The corresponding modal coordinates are used to formulate a criterion for the selection of the flight mode frequencies, which allows a reliable and automated flight mode detection. Furthermore, expanding the modal coordinates with high-resolution finite element modes allows the approximation of flight modes using a larger number of degrees of freedom than available from measurements at discrete locations. A verification case is presented using scaled flight test data of a PC-9/A trainer aircraft provided by the Defence Science and Technology Group.


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    Titel :

    Automatic Operational Modal Analysis of Flight Test Data Using a Modal Decomposition


    Beteiligte:
    Koschel, Stephan (Autor:in) / Carrese, Robert (Autor:in) / Joseph, Nishit (Autor:in) / Candon, Michael (Autor:in) / Marzocca, Pier (Autor:in) / Levinski, Oleg (Autor:in)

    Erschienen in:

    AIAA Journal ; 59 , 10 ; 4043-4056


    Erscheinungsdatum :

    2021-06-30


    Format / Umfang :

    14 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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