The XV-15 Tilt-Rotor wing has six major aeroelastic modes that are close in frequency. To precisely excite individual modes during flight test, dual flaperon exciters with automatic frequency-sweep controls were installed. The resulting structural data were analyzed in the frequency domain (Fourier-transformed) with cross-spectral and transfer-function methods. Modal frequencies and damping were determined by performing curve fits to transfer-function magnitude and phase data and to cross-spectral magnitude data. Results are given for the XV-15 with its original metal rotor blades. Frequency and damping values are also compared with earlier predictions.


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    Title :

    Using Frequency-Domain Methods to Identify XV-15 Aeroelastic Modes


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Powered Lift Conference and Exposition ; 1987



    Publication date :

    1987-12-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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