A wake vortex alleviator is provided. The wake vortex alleviator produces rapid variations in the position of vortices emanating from aerodynamic surfaces by using an active flap that moves span-wise back and forth along the outboard section of the surface. Rapidly moving the flap back and forth in a slot at an appropriate frequency will cause the vortex to oscillate, resulting in interaction between other vortices and subsequent destruction much earlier than it would occur naturally. The slot is positioned near the aerodynamic surface trailing edge and generally transverse to a chord line of the aerodynamic surface. The flap can be moved using a variety of actuators to position, translate and stow the flap. The oscillation frequency and position are guided by information feedback according variations in lift in the aerodynamic surface, such as wind gusts. The flaps can control yaw, roll and pitch of the aerodynamic surface.
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