...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bioinspiration & biomimetics >Force generation and wing deformation characteristics of a flapping-wing micro air vehicle 'DelFly II' in hovering flight
【24h】

Force generation and wing deformation characteristics of a flapping-wing micro air vehicle 'DelFly II' in hovering flight

机译：扑翼微型飞机“ DelFly II”在悬停飞行中的力产生和机翼变形特性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The study investigates the aerodynamic performance and the relation between wing deformation and unsteady force generation of a flapping-wing micro air vehicle in hovering flight configuration. Different experiments were performed where fluid forces were acquired with a force sensor, while the three-dimensional wing deformation was measured with a stereo-vision system. In these measurements, time-resolved power consumption and flapping-wing kinematics were also obtained under both in-air and in-vacuum conditions. Comparison of the results for different flapping frequencies reveals different wing kinematics and deformation characteristics. The high flapping frequency case produces higher forces throughout the complete flapping cycle. Moreover, a phase difference occurs in the variation of the forces, such that the low flapping frequency case precedes the high frequency case. A similar phase lag is observed in the temporal evolution of the wing deformation characteristics, suggesting that there is a direct link between the two phenomena. A considerable camber formation occurs during stroke reversals, which is mainly determined by the stiffener orientation. The wing with the thinner surface membrane displays very similar characteristics to the baseline wing, which implies the dominance of the stiffeners in terms of providing rigidity to the wing. Wing span has a significant effect on the aerodynamic efficiency such that increasing the span length by 4 cm results in a 6% enhancement in the cycle-averaged X-force to power consumption ratio compared to the standard DelFly II wings with a span length of 28 cm.
机译：该研究研究了在悬停飞行状态下襟翼微型飞行器的气动性能以及机翼变形与非定常力产生之间的关系。进行了不同的实验，其中使用力传感器获取了流体力，同时使用立体视觉系统测量了三维机翼变形。在这些测量中，还可以在空气和真空条件下获得时间分辨的功耗和襟翼运动学。对不同扑翼频率的结果进行比较，发现了不同的机翼运动学和变形特性。在整个拍打周期中，拍打频率较高的情况下会产生更大的力。此外，在力的变化中出现相位差，使得低拍动频率情况先于高频情况。在机翼变形特性的时间演变中观察到类似的相位滞后，表明这两种现象之间存在直接联系。在行程反转期间会出现大量的外倾角，这主要由加劲肋的方向决定。具有较薄表面膜的机翼显示出与基线机翼非常相似的特性，这暗示了在为机翼提供刚度方面，加劲肋的优势。机翼跨度对空气动力学效率有显着影响，因此与跨度长度为28的标准DelFly II机翼相比，将跨度长度增加4 cm可使循环平均X力与功耗之比提高6％。厘米。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号