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This paper presents the active control scheme for buffet load attenuation on the wings of advanced commercial aircraft prototype, built under (3AS) European project in Politecnico di Milano. Finite element commercial software, MSC/NASTRAN provided the analytical model of the forward swept wing named as X-DIA. In house software, MASSA, provided the aerodynamic and structural coupling to formulate the Aeroservoelastic model, it excited the structural modes of the wing with buffeting loads, applied as input to the model. Active control scheme has been developed to suppress the excited structural vibrations in the bandwidth range of four control surfaces located on the wing: first and second order algorithms with variable step size were used to minimize the objective function based on the controllability and observability of the system. Dedicated robustness analysis has been performed numerically and experimentally for the uncertainties in the actuators system and accelerometers located on the wing. Numerical investigation on the buffet load attenuation system was validated and supported by dedicated wind-tunnel test campaign at De Ponte wind-tunnel, Politecnico Di Milano. The results demonstrated the considerable attenuation of the buffet loads and effectiveness of the proposed system.

Sheharyar Malik, Sergio Ricci, Daniele Monti, Luca Riccobene. (2018) Buffet Load Alleviation System for Advanced Commercial Aircraft, Journal of Space Technology , Volume 8, Issue 1.
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