Results 1 to 10 of about 2,577 (115)

Effects of uniform vertical inflow perturbations on the performance of flapping wings [PDF]

Royal Society Open Science, 2021
Flapping wings have attracted significant interest for use in miniature unmanned flying vehicles. Although numerous studies have investigated the performance of flapping wings under quiescent conditions, effects of freestream disturbances on their ...
Soudeh Mazharmanesh, Albert Medina, Alex Fisher   +2 more
exaly   +4 more sources

Effects of shapes and kinematics of hovering flapping wings on aerodynamic forces and vortex structures [PDF]

Scientific Reports
The present study investigated the effects of wing shapes and flapping motions on the aerodynamic forces and vortex structures of insect flight. Aerodynamic force measurements and flow visualizations were performed in a water tank by cross-applying the ...
Hyun Ki Kwon, Jo Won Chang
doaj   +2 more sources

2.5-Dimensional Structure Approach for Miniaturizing Flapping-Wing Air Vehicles [PDF]

Micromachines
In this study, we propose a 2.5-dimensional (2.5-D) structure approach for insect-mimetic flapping-wing air vehicles (FWAVs). The proposed approach includes design and fabrication methods.
Daisuke Ishihara, Motonobu Kimura, Ryotaro Suetsugu, Jyunpei Ueo, Naoto Ohira, Masakatsu Takagi, Kazuya Ishiba, Nagi Shirakawa, Ryusei Nishinohara, Masaaki Kimura   +9 more
doaj   +2 more sources

Functional characteristics of the rigid elytra in a bamboo weevil beetle Cyrtotrachelus buqueti

IET Nanobiotechnology, 2022
The bamboo weevil beetle, Cyrtotrachelus buqueti, has evolved a particular flight pattern. When crawling, the beetle folds the flexible hind wings and stuffs under the rigid elytra.
Xin Li, Yu Zheng
doaj   +1 more source

Energy harvesting characteristics of a flapping wing with the oscillating aspirators in uniform flows and shear flows

Energy Reports, 2022
In this study, we install oscillating aspirators on the upper and lower wing surfaces of the airfoil to intensify energy harvesting characteristics of a flapping wing.
YaLei Bai, Min Zheng
doaj   +1 more source

Flapping‐Wing Dynamics as a Natural Detector of Wind Direction

Advanced Intelligent Systems, 2021
Flapping‐wing unmanned aerial vehicles have potential advantages, such as consuming lower energy by leveraging the force of wind. Since the flapping movements of the soft wings contain information about the wind, measuring the movement of each part of ...
Kazutoshi Tanaka, Shih-Hsin Yang, Yuji Tokudome, Yuna Minami, Yuyao Lu, Takayuki Arie, Seiji Akita, Kuniharu Takei, Kohei Nakajima   +8 more
doaj   +1 more source

Numerical Analysis on the Aerodynamic Characteristics of an X-wing Flapping Vehicle with Various Tails

Aerospace, 2022
X-shaped flapping wings have excellent maneuverability and flight capabilities under low-Reynolds-number conditions. An appropriate tail can extend the range of a vehicle and improve its stability.
Huadong Li, Daochun Li, Tong Shen, Dawei Bie, Zi Kan   +4 more
doaj   +1 more source

Effect of incorporating wing veins on soft wings for flapping micro air vehicles

Frontiers in Robotics and AI, 2023
Small insects with flapping wings, such as bees and flies, have flexible wings with veins, and their compliant motion enhances flight efficiency and robustness.
Risa Ishiguro, Takumi Kawasetsu, Koh Hosoda   +2 more
doaj   +1 more source

Optimization of a Twistable Hovering Flapping Wing Inspired by Giant Hummingbirds Using the Unsteady Blade Element Theory

Applied Sciences, 2023
Due to the complexity of tailoring the wing flexibility and selecting favorable kinematics, the design of flapping wings is a considerably challenging problem.
Yuanbo Dong, Bifeng Song, Wenqing Yang, Dong Xue   +3 more
doaj   +1 more source

Numerical study on the aerodynamic performance of the three-dimensional wing of a jellyfish-like flyer

Frontiers in Physics, 2023
The jellyfish-like flying machine is a new development direction of the future bionic flapping-wing aircraft besides the insect-mimic and bird-mimic micro air vehicles (MAVs).
Xueguang Meng, Chengjian Deng, Dingsheng Wang, Shujie Jiang   +3 more
doaj   +1 more source