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    Mode tracking during flutter testing using the modal assurance criterion

    Mode tracking during flutter testing using the modal assurance criterion


    Tracking the aeroelastic modes of an aircraft through changing flight conditions is an essential element of flight flutter testing, which is made difficult by corrupted data and high modal density. The modal assurance criterion (MAC), a method of evaluating the consistency of two modal vectors, is shown to simplify the mode tracking procedure by putting a numerical value on the correlation between pairs of modes identified at consecutive flight conditions. Representation of the resulting MAC values as a colour map gives a clear visual indication of modal consistency. An automated approach to mode tracking is introduced and shown to work on aircraft-type systems, over significant changes in flight condition up to and beyond the flutter speed. Some potential problems of a practical implementation are discussed.

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    Titel :

    Mode tracking during flutter testing using the modal assurance criterion

    Weitere Titelangaben:

    Die Eigenwertverfolgung mit einem modalen Sicherheitskriterium bei Flatterschwingungstests

    Beteiligte:
    Desforges, M.J. (Autor:in) / Cooper, J.E. (Autor:in) / Wright, J.R. (Autor:in)
    Erschienen in:

    Proceedings of the Institution of Mechanical Engineers, Part G (Journal of Aerospace Engineering) ; 210 , G1 ; 27-37

    Erscheinungsdatum :

    1996

    Format / Umfang :

    11 Seiten, 6 Bilder, 3 Tabellen, 5 Quellen

    ISSN :

    0954-4100

    DOI :

    https://doi.org/10.1243/PIME_PROC_1996_210_342_02

    Medientyp :

    Aufsatz (Zeitschrift)

    Format :

    Print

    Sprache :

    Englisch

    Schlagwörter :

    Luftfahrzeug , Flugverhalten , Eigenwert , Flatterschwingung , Vektor , Korrelation , Schwingungsanregung , Dämpfungsfaktor , Vergleichsmessung , Simulationsmodell , Modalanalyse , Matrix (Zahlenschema) , Freiheitsgrad , Fluggeschwindigkeit (Luft) , Expertensystem

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