Results 201 to 210 of about 9,281 (235)

A Review of Design and Fabrication of the Bionic Flapping Wing Micro Air Vehicles. [PDF]

Micromachines (Basel), 2019
Chen C, Zhang T.
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Toward a Dielectric Elastomer Resonator Driven Flapping Wing Micro Air Vehicle. [PDF]

Front Robot AI, 2018
Cao C, Burgess S, Conn AT.
europepmc   +1 more source

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Sunlight-Driven Continuous Flapping-Wing Motion

ACS Applied Materials & Interfaces, 2020
Light-driven actuators that directly convert light into mechanical work have attracted significant attention due to their wireless advantage and ability to be easily controlled. However, a fundamental impediment to their application is that the continuous motion of light-driven flexible actuators usually requires a periodically switching light source ...
Xu Dong, Jiawei Xu, Xiuzhu Xu, Shengping Dai, Xiaoshuang Zhou, Changhao Ma, Guanggui Cheng, Ningyi Yuan, Jianning Ding   +8 more
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Aerodynamic sound generation of flapping wing

The Journal of the Acoustical Society of America, 2008
The unsteady flow and acoustic characteristics of the flapping wing are numerically investigated for a two-dimensional model of Bombus terrestris bumblebee at hovering and forward flight conditions. The Reynolds number Re, based on the maximum translational velocity of the wing and the chord length, is 8800 and the Mach number M is 0.0485.
Youngmin, Bae, Young J, Moon
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A parametric study of flapping wing performance using a robotic flapping wing

2009 IEEE International Conference on Robotics and Automation, 2009
Flapping wings have the potential to revolutionize the field of Micro Aerial Vehicles (MAVs), however the effect of flapping motion on the performance of such wings has not been studied in detail. This paper presents a parametric study of flapping wing propulsion, using two types of passive flapping wings and three flapping motions. Each combination of
D. Watman, T. Furukawa
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Numerical Study of Flapping Wing

33rd AIAA Fluid Dynamics Conference and Exhibit, 2003
A numerical method is developed to solve the solutions of the Euler/Navier-Stokes equations for investigating the flowfileds of the flapping wings. It uses a third-order modified Osher-Chakravarthy (MOC) upwind finite-volume scheme for the convective terms and a second-order central finite-volume scheme for the viscous terms.
San-Yih Lin, J. Hu
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Propulsion characteristics of flapping wings

The Aeronautical Journal, 1979
In moving from the realm of stationary wing flight towards the complexity of flapping wing flight as evolved in birds, we wish to introduce the simplest means of flapping as a first step in an attempt to simplify as much as possible our wind tunnel model and also to confine our attention to the dominant thrust producing mechanism.
R. D. Archer, J. Sapuppo, D. S. Betteridge   +2 more
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Fluid mechanics of flapping wings

Experimental Thermal and Fluid Science, 2008
Abstract Based on the results of two-dimensional flapping wing studies, the selection of Strouhal number for steady cruising is explored. The hypothesis that Strouhal number selection in natural flapping wing propulsion is a limit cycle process is proposed and the implications of this hypothesis for the design, control and computational/experimental ...
K.D. von Ellenrieder, K. Parker, J. Soria   +2 more
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Aerohydrodynamics of flapping-wing propulsors

Progress in Aerospace Sciences, 2003
Abstract It is the objective of this survey to review research and development results of flapping-wing propulsors and of vehicles equipped with them. Given the complex and multi-disciplinary character of the problem, a wide range of questions is considered in order to provide a general idea of the state-of-the-art.
Kirill V. Rozhdestvensky, Vladimir A. Ryzhov   +1 more
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Flapping-Wing Aerodynamics

2007
Flying animals flap wings to create lift and thrust as well as to perform remarkable maneuvers with rapid accelerations and decelerations. Insects, bats, and birds provide illuminating examples of utilizing unsteady aerodynamics to design future MAVs.
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