A method is developed for extracting six degree-of-freedom stability and control derivatives from helicopter flight data. Different combinations of filtering and derivative estimate are investigated and used with a Bayesian approach for derivative identification. The combination of filtering and estimate found to yield the most accurate time response match to flight test data is determined and applied to CH-53A and CH-54B flight data. The method found to be most accurate consists of (1) filtering flight test data with a digital filter, followed by an extended Kalman filter (2) identifying a derivative estimate with a least square estimator, and (3) obtaining derivatives with the Bayesian derivative extraction method. (Author)


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    Titel :

    Analytical Study to Define a Helicopter Stability Derivative Extraction Method, Volume 1


    Beteiligte:
    J. A. Molusis (Autor:in)

    Erscheinungsdatum :

    1973


    Format / Umfang :

    244 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch