Dynamic effects of wing planform changes are investigated with the goal of gust alleviation. Force measurements are done on a low-aspect-ratio high-angle-of-attack translating wing having a rectangular planform that incorporates a moving tip with in-plane rotation and sweep. To create streamwise gusts, the wing is towed in a water tank from constant motion to a new velocity that is 50% higher (“step-up”) or lower (“step-down”) through ramp distances of 1, 3, and 6 chords traveled. The tip panel is rotated inward for the step-up cases to lower the gust lift peaks and outward for step-down gusts to mitigate the lift lost. The actuation cases are compared using the unsteady $C_L$ with two reference geometries (pre- or post-gust wing shapes). In most cases, actuation yields better gust-force change for = 2 than = 4, due to the greater change in wing planform. The actuation timing also alters the details of the force recovery. Furthermore, an impulse metric shows that inward tip actuation can mitigate the gust-impulse change by as much as 38% and outward tip actuation by 84%. A superposition of the individual effects of the actuation and gust is tested against the cases of actuation during gusts.

以减轻阵风为目标，研究了机翼平面形状变化的动态影响。力的测量是在具有矩形平面的低纵横比高攻角平移机翼上进行的，该机翼合并了带有平面内旋转和掠过运动的尖端。为了产生顺流阵风，机翼在水箱中被从恒定运动拖曳到新的速度，该新速度通过1、3和3的坡距增加（“升压”）或降低（“降压”）50％。共走了6个和弦。前端面板向内旋转，以增强气势，以降低阵风升力峰值；向外侧旋转，以降低阵风，以减轻气势损失。使用非稳态比较驱动情况$C_{\mathrm{大号}}$具有两个参考几何形状（阵风前或阵风后机翼形状）。在大多数情况下，由于机翼平面形状的变化较大，因此对于= 2而言，作动可产生比= 4更好的阵风变化。启动时间也会改变力恢复的细节。此外，冲动量度表明，向内的尖端致动可以减轻阵风冲动变化多达38％，向外部的尖端致动可以减轻84％。针对阵风期间的促动情况，测试了促动和阵风的各个效果的叠加。