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Impact of Control-Surface Flexibility on the Dynamic Response of Flexible Aircraft

AIAA 2020-1185
Session: Aircraft Load Alleviation
Published Online:https://doi.org/10.2514/6.2020-1185
Abstract:

Significant flexibility in aircraft wings may reduce aileron effectiveness and degrade roll maneuverability. This paper investigates the impact of aileron flexibility on the dynamic response of a generic transport aircraft in free flight. To this purpose, the University of Michigan’s Nonlinear Aeroelastic Simulation Toolbox (UM/NAST) is extended to model control surfaces as fully flexible, geometrically nonlinear beam-type members. A roll maneuver is simulated with and without considering aileron flexibility, showing that it impacts the aircraft response by leading to smaller roll angles developed in time for given aileron inputs.