Abstract
In Part II of this series we characterize and model gust effects on the research airfoil, and employ them for control. Critical to gust mitigation is detection of the gust onset and its amplitude before impact, which we measure by an X-wire sensor positioned at two separate locations upstream of the test airfoil. Different closed-loop control strategies are compared, including model-based feedback, hand-tuned proportional-integral (PI) feedback, only feedforward, and combined feedback and feedforward controllers. The experimental results demonstrate the effectiveness of the combined approach in mitigating the lift fluctuations during quasi-random gust encounters at various $\ensuremath{\alpha}$ and $\ensuremath{\delta}$.
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