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- W2324273375 abstract "The preliminary Multidisciplinary Design and Optimisation (MDO) of a flexible wing aerofoil apropos a small Unmanned Air Vehicle (UAV) is performed using a multifidelity model-based strategy. Both the passively adaptive structure and the shape of the flexible wing aerofoil are optimised for best aerodynamic performance under aero-structural constraints, within a coupled aeroelastic formulation. A typical flight mission for surveillance purposes is considered and includes the potential occurrence of wind gusts. A metamodel for the high-fidelity objective function and each of the constraints is built, based on a tuned low-fidelity one, in order to improve the efficiency of the optimisation process. Both metamodels are based on solutions of the aeroelastic equations for a flexible aerofoil but employ different levels of complexity and computational cost for modelling aerodynamics and structural dynamics within a modal approach. The high-fidelity model employs nonlinear Computational Fluid Dynamics (CFD) coupled with a full set of prescribed structural modes, whereas the low-fidelity one employs linear thin aerofoil theory coupled with a reduced set of the latter. The low-fidelity responses are then corrected according to few high-fidelity responses, as prescribed by an appropriate Design of Experiment (DOE), by means of a suitable tuning technique. A standard Genetic Algorithm (GA) is hence utilised to find the global optimum, showing that a flexible aerofoil is characterised by higher aerodynamic efficiency than its rigid counterpart." @default.
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- W2324273375 date "2012-09-11" @default.
- W2324273375 modified "2023-10-05" @default.
- W2324273375 title "Multidisciplinary Multifidelity Optimisation of a Flexible Wing Aerofoil for Small UAV" @default.
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- W2324273375 doi "https://doi.org/10.2514/6.2012-5400" @default.
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