Aerodynamic control of micro air vehicle wings using electroactive membranes
Aerodynamic control of micro air vehicle wings using electroactive membranes
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DOI：
10.1177/1045389x12470303
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发表时间：
2013-05-01
影响因子：
2.7
通讯作者：
Oates, William S.
中科院分区：
文献类型：
--
作者：
Hays, Michael R.;Morton, Jeffrey;Oates, William S.
介电弹性体材料由于其电场引起的变形而成为开发高敏捷微型飞行器的理想候选材料。因此，介电弹性体材料 VHB 4910 的航空结构响应和控制能力在椭圆形膜翼上进行表征。通过在刚性椭圆形翼框架上拉伸 VHB 4910 构建了实验性膜翼平台。当不同的静电场施加到膜上时，椭圆机翼的低雷诺数（弦雷诺数<10(6)）和空气动力学得到了表征。我们观察到在 4.5 kV 的施加电压下升力总体增加，最大增益为 20%，并证明了延迟失速的能力。还通过比较刺平衡数据和使用视觉图像相关测量的膜变形来研究时间平均空气动力学表面压力。将实验结果与非线性有限元膜模型进行比较，以进一步了解气动载荷和电场对膜位移的影响。表面压力的模型预测可以深入了解电致伸缩本构关系如何影响膜的流固相互作用。通过将模型的升力预测与失速附近的时间平均风洞升力测量值进行比较来验证这一点。
Dielectric elastomer materials are ideal candidates for developing high-agility micro air vehicles due to their electric field-induced deformation. Consequently, the aero-structural response and control authority of the dielectric elastomer material, VHB 4910, are characterized on an elliptical membrane wing. An experimental membrane wing platform was constructed by stretching VHB 4910 over a rigid elliptical wing-frame. The low Reynolds number (chord Reynolds number < 10(6)) and aerodynamics of the elliptical wing were characterized when different electrostatic fields were applied to the membrane. We observe an overall increase in lift with maximum gains of 20% at an applied voltage of 4.5 kV and demonstrate the ability to delay stall. The time-averaged aerodynamic surface pressure is also investigated by comparing sting balance data and membrane deformation measured using visual image correlation. The experimental results are compared to a nonlinear finite element membrane model to further understand the effects of aerodynamic load and electric fields on membrane displacements. Model predictions of surface pressure provide insight into how the electrostrictive constitutive relations influence the fluid-structure interactions of the membrane. This is validated by comparing lift predictions from the model with time-averaged wind tunnel lift measurements near stall.