Results 111 to 120 of about 587 (163)

Origin of avian flapping flight

Journal of Fossil Research, 2022
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Data-driven control of flapping flight

ACM Transactions on Graphics, 2013
We present a physically based controller that simulates the flapping behavior of a bird in flight. We recorded the motion of a dove using marker-based optical motion capture and high-speed video cameras. The bird flight data thus acquired allow us to parameterize natural wingbeat cycles and provide the simulated bird with reference trajectories to ...
Jungdam Won, Jehee Lee, Junyong Noh
exaly   +3 more sources

Is Flapping Flight Aerodynamically Efficient?

32nd AIAA Applied Aerodynamics Conference, 2014
Flapping flight is much less efficient for some insects than previously thought. The induced power factor for flapping wings is discussed in terms of a number of non-ideal effects for hovering and for forward flight. These effects include losses due to non-uniform downwash, wake periodicity and effective disk area.
Nabawy, M.R.A., Crowther, W.J.; id_orcid 0000-0002-0613-9375   +1 more
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The Flapping Flight of Birds

The Journal of the Royal Aeronautical Society, 1925
In connection with gliding flight enough measurements of “ lift ” and “ drag ” have been made to enable us to calculate the conditions for success of an aeroplane fitted with wings of standard sections; but no attempt has been made, as far as the present writer is aware, to ascertain what would happen if a flying machine were fitted with wings of ...
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Optimization of the flapping motion for the hovering flight

2011 IEEE International Conference on Robotics and Biomimetics, 2011
The kinematics of a flapping plate is determined by solving a path optimization problem for the hovering flight. The flapping motion of the flat plate is described by a combined sinusoidal plunging and pitching motion in the horizontal plane. The optimization process is carried out based on a well defined surrogate model which is made from the results ...
Jung-Sun Choi, Jae-Woong Kim, Do-Hyung Lee, Gyung-Jin Park   +3 more
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Flapping Flight

Aeronautical journal (London, England : 1897), 1915
A paper on “Flapping Flight of Aeroplanes ” by the present writer was communicated by the late Professor G. F. FitzGerald to the “ Proceedings ” of the Royal Society (Vol. 64, pp. 420-430) in 1899. At that date much that is now almost common knowledge concerning the mechanics of flight was little thought of, much less understood, practical aviation did
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Analysis of Biplane Flapping Flight with Tail

42nd AIAA Fluid Dynamics Conference and Exhibit, 2012
Numerical simulations have been performed to examine the interference effects between an upstream flapping biplane airfoil arrangement and a downstream stationary tail at a Reynolds number of 1000, which is around the regime of small flapping micro aerial vehicles.
Tay, W.B. (author), Bijl, H. (author), Van Oudheusden, B.W. (author)   +2 more
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Propulsion efficiency of flapping flight robots

2017 IEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics, Automation and Mechatronics (RAM), 2017
Flapping wing technologies have been successfully applied to robots either flying in the air or gliding through the water owing to the unique advantages of flapping flight under small Re conditions. Propulsion efficiency of flapping-twisting compound motion wings are analyzed in the present study.
Longfei Zhao, Yaoxing Shang, Zongxia Jiao   +2 more
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Dragonfly Flight : II. Velocities, Accelerations and Kinematics of Flapping Flight

Journal of Experimental Biology, 1997
ABSTRACT The free flapping flight of the dragonfly Sympetrum sanguineum and the damselfly Calopteryx splendens was filmed in a large flight enclosure at 3000 frames s−1. The wingtip kinematics are described for these flights. Despite the two species being similar in size, the damselfly flew with wingbeat frequencies half those of the ...
JM, Wakeling, CP, Ellington
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Reconstruction of Flight Parameters of a Bat for Flapping Robots

Journal of Biomechanical Engineering, 2022
Abstract The flight of bats is comparatively less documented and understood than birds and insects and may provide novel inspiration for the design of flapping flight robots. This study captured the natural flight of short-nosed fruit bats (Cynopterus sphinx) by an optical motion capture system, “OptiTrack”, with pasted markers on the ...
Sudeep Kumar, Singh, Li-Biao, Zhang, Jing-Shan, Zhao   +2 more
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