An artificial neural network is trained using helicopter flight test data to predict rotor system component loads during high-speed maneuvering flight. Inputs to the network include control positions and aircraft state parameters. These parameters can be measured easily in the nonrotating system, i.e., the fuselage, and vary at a relatively low frequency. A network design sensitivity study is conducted and several networks are developed for three loads: the rotor blade pushrod load, blade normal bending moment, and main-rotor damper load. Prediction accuracy is evaluated using a validation data set consisting of symmetric pullout maneuvers, rolling pullout maneuvers, and climbing turns not contained in the training data set. A traditional statistical approach, stepwise multiple linear regression, also is utilized, and the two methods are compared and contrasted. Correlation coefficients from 84 % to 97 % are achievable using the neural network model for all three loads. Through a unified approach involving both neural network and statistical analysis, greater accuracy and understanding of the neural network is attained.


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    Titel :

    Prediction of helicopter component loads using neural networks


    Weitere Titelangaben:

    Die Vorhersage von Hubschrauber-Komponentenbelastungen unter Anwendung der Theorie neuronaler Netze


    Beteiligte:
    Haas, D.J. (Autor:in) / Milano, J. (Autor:in) / Flitter, L. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1995


    Format / Umfang :

    11 Seiten, 5 Bilder, 9 Tabellen, 9 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





    PREDICTION OF HELICOPTER COMPONENT LOADS USING NEURAL NETWORKS

    HAAS, DAVID / MILANO, JOEL / FLITTER, LANCE | AIAA | 1993


    Prediction of helicopter component loads using neural networks

    Haas, D.J. / Milano, J. / Flitter, L. | Tema Archiv | 1993


    Artificial neural networks for predicting nonlinear dynamic helicopter loads

    Cook, A.B. / Fuller, C.R. / O'Brien, W.F. et al. | Tema Archiv | 1994


    Artificial neural networks for predicting nonlinear dynamic helicopter loads

    Cook, A. B. / Fuller, C. R. / O'Brien, W. F. et al. | AIAA | 1994