The objective of this research is the development and flight test of a digital multi-rate VTOL autoland system. This autoland system provided the NASA/Army Fly-by-Wire CH-47 helicopter with an automatic 4-D trajectory following and landing capability. Flight tests were conducted along complex trajectories with descending, turning, and decelerating segments. The flight software consists of a trajectory generator and guidance algorithm operating at two iterations per second and a set of sensor filters and an advanced controller operating at 10 iterations per second. This low iteration rate digital controller has a proportional-integral structure that provides an autotrim function. The control gains, scheduled as a function of flight condition, are updated every two seconds. All flight software, except input/output routines, are coded in FORTRAN using floating point arithmetic and are exercised in a ROLM 1664 flight computer. The flight software, the ground and flight hardware, the autoland system's position tracking performance, and the controller's velocity and heading tracking performance are presented.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Flight test of a VTOL digital autoland system along complex trajectories


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

    Kongress:

    Guidance and Control Conference ; 1979 ; Boulder, CO


    Erscheinungsdatum :

    1979-01-01


    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch






    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

    Freier Zugriff

    FAA/Ohio University/UPS Autoland Flight Test Results

    Van Graas, F. / Diggle, D. / Wullschleger, V. et al. | British Library Conference Proceedings | 1995