ABSTRACT
The design of a passive load alleviation system is to reduce the gust loads of the high aspect ratio wings with as little additional structure weight as possible. The paper describes a passive control approach, mounting Passive Gust Alleviation Device (PGAD) at the wing tip, to minimize the gust response of flexible wing. The investigation is started from the aeroelastic modeling by using geometrically exactly intrinsic beam theory, Pitt-Peters dynamic inflow aerodynamic model and the 1-cosine discrete gust model. Space-time finite element discretization is applied to solve the governing equations. Finally, the static deformation and gust response of a cantilever wing with PGAD are studied using Newton-Raphson method and Generalized-a method, and the results indicate that PGAD is feasibility and effective on gust response reduction.
