Analysis of effects of spanwise variations of gust velocity on a vane-controlled gust-alleviation system

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National Aeronautics and Space Administration, 1971 - Crafts & Hobbies - 27 pages
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An analysis has been made of the effects of spanwise variations of gust velocity in isotropic turbulence on a gust-alleviation system which employs an angle-of-attack vane mounted ahead of the wing to sense the vertical gust velocity. The wing flaps were moved in response to the vane deflection by a linear second-order servosystem to produce a lift opposite to that produced by the gust. Consideration of spanwise variation of gusts has indicated design parameters (gain and natural frequency of flap servosystem and vane location) that give substantial reduction of the lift due to gusts.

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