Automatic landing of aircraft is a challenging guidance and control task that requires multiple feedback loops and a precise sequence of actions. Increasing operational flexibility and reducing the dependence on external infrastructure are key challenges for future unmanned aircraft. Usually, an aircraft performs the final approach on a straight line. This paper contributes a complete automatic landing controller capable of using three-dimensional curved approach paths all the way until touchdown. The controller consists of a nonlinear guidance law that steers the aircraft along a predefined spline path, various single-input–single-output control loops for rate and attitude control, and a robust multivariable flare controller. This flare controller ensures a three-point landing, i.e., simultaneous touchdown of all three wheels. Further, practical issues such as bumpless mode transfer and anti-windup compensation are considered. The controller is evaluated in multiple flight test experiments. Both the crabbed approach and the sideslip technique are demonstrated on several different approach paths, such as a steep curve and a helix. These paths are particularly challenging, because the flare maneuver is performed while the aircraft is in a turn. The controller is shown to reliably land the aircraft on an unpaved runway with high precision.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Flight Testing Automatic Landing Control for Unmanned Aircraft Including Curved Approaches


    Beteiligte:
    Sedlmair, Nicolas (Autor:in) / Theis, Julian (Autor:in) / Thielecke, Frank (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2021-11-10


    Format / Umfang :

    14 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Flight testing automatic landing control for unmanned aircraft including curved approaches

    Sedlmair, Nicolas / Theis, Julian / Thielecke, Frank | BASE | 2021

    Freier Zugriff

    A flight evaluation of curved landing approaches

    Gee, S. W. / Barber, M. R. / Mcmurtry, T. C. | NTRS | 1972


    METHOD FOR AIRCRAFT AUTOMATIC LANDING IN DIFFICULT WEATHER CONDITIONS, INCLUDING UNMANNED

    GRIBANOV ALEKSANDR SERGEEVICH / VOLODIN EVGENIJ ALEKSANDROVICH / SAMORODOV ALEKSANDR GENNADEVICH et al. | Europäisches Patentamt | 2016

    Freier Zugriff

    UNMANNED AIRCRAFT FLIGHT CONTROL DEVICE, UNMANNED AIRCRAFT FLIGHT CONTROL METHOD, AND UNMANNED AIRCRAFT FLIGHT CONTROL PROGRAM

    YOSHIFUKU YASUHIRO / TAKAHASHI YU / TOMONAGA YUKINOBU et al. | Europäisches Patentamt | 2018

    Freier Zugriff

    UNMANNED AIRCRAFT, UNMANNED AIRCRAFT FLIGHT CONTROL DEVICE, UNMANNED AIRCRAFT FLIGHT CONTROL METHOD AND PROGRAM

    RAABE CHRISTOPHER THOMAS / BERGSTROM NIKLAS | Europäisches Patentamt | 2019

    Freier Zugriff