This paper describes the flight test evaluation of an advanced digital helicopter flight control system. The controller was designed using an optimal control design procedure for a fully coupled lateral and longitudinal vehicle model. Explicit integrals of the guidance error were included to produce a Type 1 characteristics. Gain scheduling was used to account for changes in the vehicle dynamics. The digital controller was exercised by combining it with state estimators, a trajectory generator and a closed-loop guidance algorithm to form a helicopter autoland system. A CH-47 tandem rotor helicopter was equipped with sensors, on-board digital flight computers and electro-hydraulic actuators. The system was exercised by automatically flying straight-in descending decelerating trajectories typical of VFR manual landing approaches. A description of the test-ground facilities, the flight hardware and software, and the velocity and position tracking performance is included.


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    Titel :

    Flight test of a digital controller used in a helicopter autoland system


    Weitere Titelangaben:

    Flugtest eines Digitalreglers, der in einem automatischen Landesystem fuer Helikopter Verwendung findet


    Beteiligte:
    Downing, D.R. (Autor:in) / Bryant, W.H. (Autor:in)

    Erschienen in:

    Automatica, Oxford ; 23 , 3 ; 295-300


    Erscheinungsdatum :

    1987


    Format / Umfang :

    6 Seiten, 7 Bilder, 2 Tabellen, 7 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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    Downing, D. R. / Bryant, W. H. / Ostroff, A. J. | NTRS | 1979



    Interferometric GPS Flight Reference/Autoland System: Flight Test Results

    Van Graas, F. / Diggle, D. W. / Hueschen, R. M. et al. | British Library Conference Proceedings | 1993



    Emergency autoland system

    HASKINS SCOTT K / DUERKSEN NOEL J / PATEL BENJAMIN N et al. | Europäisches Patentamt | 2024

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