This paper discusses the use of lattice filter formulations for computing instability boundaries from subcritical test data. Lattice filters have the inherent properties such that the instability mechanism does not have to be known a priori and the model order can be self adjusting for the data being observed. The filters are numerically efficient and there exist lattice filter forms where if the excitation force on the structure is Gaussian noise over the bandwidth of interest, then the input forces do not need to be measured. Resuits from an application of the lattice filter formulation on a high speed wind tunnel flutter model test show that the projected boundaries compare accurately with actual flutter boundaries encountered during the test.


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    Title :

    Predicting Dynamic Instability Boundaries Using Lattice Filters


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Aerospace Congress and Exposition ; 1983



    Publication date :

    1983-10-03




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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