Three flutter-suppression designs for a flexible flying-wing research drone are discussed, along with the modeling and flight-test results. The drone, with wing span of 10 feet, aspect ratio of almost 9, and control surfaces along the entire wing trailing edges, was developed for flight research into the modeling and control of highly elastic aircraft. The low-speed vehicle was designed to exhibit body-freedom flutter in its flight envelope. The all-important dynamic modeling of the vehicle, used for analysis and control design, is based on a mean-axis formulation and quasi-steady aerodynamics, with the nondimensional aerodynamic/aeroelastic coefficients updated from flight tests. Flutter-modeling results were found to agree with those from NASTRAN and flight tests. The three different flutter-suppression approaches include both fairly classical and multivariable methods, all fixed gains but with different architectures. The primary control-design objective was to augment the damping of the eventual flutter mode at a design condition below the open-loop flutter speed, for safety of flight, and to achieve a closed-loop flutter speed at least as high as the open-loop flutter speed. Analysis and flight tests revealed that all three designs achieved these design goals. In addition, two of these designs actually expanded the flutter boundary. The theoretical stability robustness of all three controllers at the design flight condition is quite good, but there are differences in controller complexity. Research is currently underway to further expand the flutter boundary using all three design approaches.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Modeling, Design, and Flight Testing of Three Flutter Controllers for a Flying-Wing Drone


    Beteiligte:

    Erschienen in:

    Journal of Aircraft ; 57 , 4 ; 615-634


    Erscheinungsdatum :

    2020-03-06


    Format / Umfang :

    20 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Modeling, design, and flight testing of three flutter controllers for a flying-wing drone

    Schmidt, David K. / Danowsky, Brian P. / Kotikalpudi, Aditya et al. | BASE | 2020

    Freier Zugriff


    Flight-Dynamics and Flutter Modeling and Analyses of a Flexible Flying-Wing Drone - Invited

    Schmidt, David K. / Zhao, Wei / Kapania, Rakesh K. | AIAA | 2016



    Flight-Dynamics and Flutter Modeling and Analyses of a Flexible Flying-Wing Drone - Invited (AIAA 2016-1748)

    Schmidt, David K. / Zhao, Wei / Kapania, Rakesh K. | British Library Conference Proceedings | 2016