A comprehensive conceptual design study is performed to assess the potential benefits of span morphing technology and to determine its feasibility when incorporated on medium altitude long endurance unmanned air vehicles. A representative medium altitude long endurance unmanned air vehicle based on the BAE Systems Herti unmanned air vehicle was selected. Stability and control benefits are investigated by operating the morphing span asymmetrically to replace conventional ailerons. The Tornado vortex lattice method was incorporated for aerodynamic predictions. The sensitivity of rolling moment generated by span morphing for different flight parameters (instantaneous vehicular weight and angle of attack) is studied. The variation of roll rate (steady and transient response) with span morphing (for constant rolling moment) for different rolling strategies (extension and retraction) is investigated. It turns out that the optimum rolling strategy is to extend one side of the wing by 22% while retract the other by 22%. Operational performance benefits are investigated by operating the morphing span symmetrically to reduce drag, increase endurance and reduce take-off and landing distances. Twenty-two per cent symmetric span morphing reduces the total drag by 13%, enhances the endurance capability by 6.5% and reduces the take-off field length and landing distance by 28% and 10%, respectively.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    An integrated conceptual design study using span morphing technology


    Beteiligte:


    Erscheinungsdatum :

    2014


    Format / Umfang :

    20 Seiten, 27 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Span Morphing: A Conceptual Design Study

    Little, O. / Ajaj, R. / Friswell, M. et al. | British Library Conference Proceedings | 2012


    Span Morphing: A Conceptual Design Study

    Ajaj, Rafic / Friswell, Michael / Saavedra Flores, E. et al. | AIAA | 2012


    VARIABLE SPAN MORPHING WING

    BAE JAE SUNG / HWANG JAI HYUK / CHOI SOO MIN | Europäisches Patentamt | 2015

    Freier Zugriff

    Span Morphing Using the Compliant Spar

    Friswell, M. I | Online Contents | 2015


    Span morphing using the GNATSpar wing

    Ajaj, R.M | Online Contents | 2016