High-altitude long-endurance unmanned aerial vehicles are inherently highly flexible, and therefore are more susceptible to very large structural deformation in trimmed flight and in atmospheric turbulence. This work aims to avoid these large wing deformations by incorporating and deflecting multiple redundant control surfaces along the leading and trailing edges of the wing. These surfaces are used in both trim optimization to constrain wing deformation to a user-defined value in steady trimmed flight and in minimizing the dynamic response to gust encounter via a feedback controller. Trim optimization is performed using the simplex algorithm. Concurrently, a robust control scheme is designed and applied using H loop shaping to demonstrate that, although the control surfaces are used for trimming the aircraft, they have enough authority left to effectively minimize elastic wing deformations during gust penetration. The aforementioned methodology is demonstrated on a highly flexible flying wing. Trim optimization effectively allows trimmed flight at various load factors in the flight envelope while maintaining small structural deformations. The designed controller significantly reduces the maximum wing deflection experienced by a gust disturbance, which is bounded below a user-specified value.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Deformation Control of Highly Flexible Aircraft in Trimmed Flight and Gust Encounter


    Contributors:

    Published in:

    Journal of Aircraft ; 55 , 2 ; 829-840


    Publication date :

    2017-09-20


    Size :

    12 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Minimization of Wing Deformation in Trimmed Flight of Highly Flexible Aircraft Using Multiple Control Surfaces

    Yagil, Leeran / Raveh, Daniella | British Library Conference Proceedings | 2016


    Gust Response of Highly Flexible Aircraft

    Patil, Mayuresh / Taylor, Dana | AIAA | 2006


    Nonlinear gust response of highly flexible aircraft

    Patil, Mayuresh J. | Tema Archive | 2007