Results 41 to 50 of about 25,283 (254)
Aerospace, 2022 In this work, we use a three-dimensional computational fluid dynamics (CFD) simulation to comprehend how the two wing arrangement variables, i.e., inner/outer wing proportion and mid-stroke dihedral, affect the lift characteristic of a bat-inspired span ...
Dawei Bie +4 more
doaj +1 more source
Periodic and Chaotic Flapping of Insectile Wings
, 2015 Insects use flight muscles attached at the base of the wings to produce impressive wing flapping frequencies. The maximum power output of these flight muscles is insufficient to maintain such wing oscillations unless there is good elastic storage of ...
Huang, Yangyang, Kanso, Eva
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Optimized kinematics enable both aerial and aquatic propulsion from a single three-dimensional flapping wing [PDF]
, 2018 Flapping wings in nature demonstrate a large force envelope, with capabilities far beyond the traditional limits of static airfoil section coefficients. Puffins, murres, and other auks particularly showcase this effect, as they are able to generate both ...
Izraelevitz, Jacob Samuel +2 more
core +1 more source
The aerodynamic effects of wing–wing interaction in flapping insect wings
Journal of Experimental Biology, 2005 SUMMARYWe employed a dynamically scaled mechanical model of the small fruit fly Drosophila melanogaster (Reynolds number 100–200) to investigate force enhancement due to contralateral wing interactions during stroke reversal (the `clap-and-fling'). The results suggest that lift enhancement during clap-and-fling requires an angular separation between ...
Lehmann, Fritz-Olaf +2 more
openaire +3 more sources
How wing compliance drives the efficiency of self-propelled flapping flyers
, 2010 Wing flexibility governs the flying performance of flapping wing flyers. Here, we use a self-propelled flapping-wing model mounted on a ``merry go round'' to investigate the effect of wing compliance on the propulsive efficiency of the system.
Godoy-Diana, Ramiro, Thiria, Benjamin
core +1 more source
Rotational accelerations stabilize leading edge vortices on revolving fly wings [PDF]
, 2009 The aerodynamic performance of hovering insects is largely explained by the presence of a stably attached leading edge vortex (LEV) on top of their wings. Although LEVs have been visualized on real, physically modeled, and simulated insects, the physical
Dickinson, Michael H., Lentink, David
core +2 more sources
Optimal Elastic Wing for Flapping-Wing Robots Through Passive Morphing
IEEE Robotics and Automation Letters, 2023 Flapping wing robots show promise as platforms for safe and efficient flight in near-human operations, thanks to their ability to agile maneuver or perch at a low Reynolds number. The growing trend in the automatization of these robots has to go hand in hand with an increase in the payload capacity.
Ruiz, Cristina +3 more
openaire +2 more sources
Uncovering the physics of flapping flat plates with artificial evolution [PDF]
, 2005 We consider an experiment in which a rectangular flat plate is flapped with two degrees of freedom, and a genetic algorithm tunes its trajectory parameters so as to achieve maximum average lift force, thus evolving a population of trajectories all ...
Gharib, Morteza, Milano, Michele
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Passive Wing Rotation in Flexible Flapping Wing Aerodynamics [PDF]
30th AIAA Applied Aerodynamics Conference, 2012 *Insect wings are flexible. For rigid wings lift enhancing unsteady aerodynamics mechanisms, such as delayed stall via leading-edge vortices (LEVs), wake-capture, and rotational forces, characterize the lift generation of a hovering insect. We have uncovered a novel mechanism that fruit fly size insects can utilize to further increase the lift by ...
Kang, Chang-Kwon, Shyy, Wei
openaire +2 more sources
Soft Actuators Integrated with Control and Power Units: Approaching Wireless Autonomous Soft Robots
Advanced Robotics Research, EarlyView.Soft robots exhibit significant development potential in various applications. However, there are still key technical challenges regarding material improvement, structure design and components integration. This review focuses on the development and challenge of soft actuators, power components, and control components in untethered intelligent soft ...
Renwu Shi, Feifei Pan, Xiaobin Ji
wiley +1 more source