Results 251 to 260 of about 522,105 (314)

Passive wing deployment and retraction in beetles and flapping microrobots

Nature
Birds, bats and many insects can tuck their wings against their bodies when at rest and deploy them to power flight. Whereas birds and bats use well-developed pectoral and wing muscles1,2, how insects control their wing deployment and retraction remains ...
Hoang-Vu Phan, Hoon Cheol Park, Dario Floreano   +2 more
semanticscholar   +1 more source

Coexistence of dual wing–wake interaction mechanisms during the rapid rotation of flapping wings

Journal of Fluid Mechanics
Insects flip their wings around each stroke reversal and may enhance lift in the early stage of a half-stroke. The possible lift-enhancing mechanism of this rapid wing rotation and its strong connection with wake vortices are still underexplored ...
Long Chen, Jianghao Wu
semanticscholar   +1 more source

Efficient flapping wing drone arrests high-speed flight using post-stall soaring

Science Robotics, 2020
An ornithopter hovers, darts, turns rapidly, and pulls up from a dive by blending paraglider, airplane, and helicopter characteristics. The aerobatic maneuvers of swifts could be very useful for micro aerial vehicle missions.
Y. Chin, J. Kok, Yongjing Zhu, W. Chan, J. Chahl, B. Khoo, G. Lau   +6 more
semanticscholar   +1 more source

The effect of wing flexibility on sound generation of flapping wings

Bioinspiration & Biomimetics, 2017
In this study, the unsteady flow and acoustic characteristics of a three-dimensional (3D) flapping wing model of a Tibicen linnei cicada in forward-flight are numerically investigated. A single cicada wing is modelled as a membrane with a prescribed motion reconstructed from high-speed videos of a live insect.
Biao, Geng, Qian, Xue, Xudong, Zheng, Geng, Liu, Yan, Ren, Haibo, Dong   +5 more
openaire   +2 more sources

Pitching Moment Generation in an Insect-Mimicking Flapping-Wing System

Journal of Bionic Engineering, 2014
Unlike birds, insects lack control surfaces at the tail and hence most insects modify their wing kinematics to produce control forces or moments while flapping their wings.
Hoang Vu Phan, Sanjay P Sane, Hoon Cheol Park   +2 more
exaly   +2 more sources

Wing Brake Flaps

Aircraft Engineering and Aerospace Technology, 1935
IT seems rather strange that while the general property of wing flaps of putting up both the lift and the drag of a wing at the same time has been known for many years, so little practical application of this result has been made until quite recently.
openaire   +2 more sources

A wing characterization method for flapping-wing robotic insects

2013 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2013
This paper presents a wing characterization method for insect-scale flapping-wing robots. A quasi-steady model is developed to predict passive wing pitching at mid-stroke. Millimeter scale wings and passive hinges are manufactured using the SCM fabrication processes.
Alexis Lussier Desbiens, Yufeng Chen 0003, Robert J. Wood   +2 more
openaire   +1 more source

Aerodynamical Improvement of Delta Wing and Flapping Wing

Volume 1A: Symposia, Part 2, 2015
Recently, various studies of Micro Air Vehicle (MAV) and Unmanned Air Vehicle (UAV) have been reported from wide range points of view. The aim of this study are researching the aerodynamic improvement of delta wing and flapping wing in low Reynold’s number region to develop an applicative these air vehicle.
Tadateru Ishide, Kazuya Naganuma, Shinsuke Seiji, Hiroyuki Ishikawa, Ryo Fujii, Kazuo Maeno   +5 more
openaire   +1 more source

Translational damping on flapping cicada wings

2011 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2011
We measured the dynamic damping of a pair of flapping cicada wings mounted on a robotic insect thorax mechanism capable of high frequency flapping. The damping coefficients were derived based on the measurements of the wing-thorax mechanism translating along its body principal axes.
Perry Parks, Bo Cheng 0002, Zheng Hu, Xinyan Deng   +3 more
openaire   +1 more source

A Testing Platform for Flapping-Wing Robots

2020 5th International Conference on Advanced Robotics and Mechatronics (ICARM), 2020
The validation and optimization of the design of flapping-wing robots (FWRs) are difficult. The wind-tunnel instrument usually used in the performance testing of FWRs is expensive. This work introduces a simple and low-cost testing platform that can be conveniently used to test the FWRs.
Fanzhang Huang, Jun Zhang 0030, Maozeng Zhang, Chaojun Jiang, Qi Liu, Aiguo Song   +5 more
openaire   +1 more source