The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform
Ordaz, Laura J. - One of the best experts on this subject based on the ideXlab platform.
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Experimental Analysis of Unsteady Aerodynamic Covert Feather Behavior
The Research Repository @ WVU, 2018Co-Authors: Ordaz, Laura J.Abstract:The interest in man-made flying vehicles has existed for over 100 years. Bird flight has been the major inspiration for the creation of such vehicles. More recently, UAVs (unmanned aerial vehicles) have become more popular and their use in more applications has developed the need for improved maneuverability. UAVs are also decreasing in size which has allowed them to operate within similar flight conditions as birds. Studying bird Feather behavior may open doors and shed some light as to how the bird achieves such agility and control, which may then be adapted to UAV flight. In this research, the motion of the freely moving Covert Feathers on a live trained American kestrel and a preserved pre-existing Red-tailed hawk wing were studied. High-speed and GoPro video footage was taken of an American kestrel while landing on a perch inside of the WVU Emissions and Free Flight Wind Tunnel. The distance between the perches varied. The GoPro and high-speed cameras were setup in different locations capturing movement from a variety of perspectives. Video analysis was performed on this footage to obtain flight data, including velocity and Covert Feather frequency as the bird approached the landing perch. The pre-existing Red-tailed hawk wing was tested in the WVU Closed Loop Wind Tunnel. A high-speed camera was used to capture Feather movements. The test regime included static and dynamic angles of attack. The dynamic motion was achieved using a motor and link system. Frequencies recorded during static angle testing were compared to frequencies found during dynamic motion. Both sets of frequencies were found to be within the same range. These recorded Feather frequencies were then compared to the frequencies obtained in the free flight experiment. Frequencies observed during the free flight experiment were slightly higher than those found while testing the preserved wing
Wina Meckvichai - One of the best experts on this subject based on the ideXlab platform.
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model of peacock tail Covert Feather based on its microscopic structure
KMITL-Science and Technology Journal, 2013Co-Authors: Chinawat Vilasineewan, Suchada Siripant, Wina MeckvichaiAbstract:This article presents a mathematical model called “the ridge model”, which is used to create peacock tail Covert Feathers based on the relationships among the morphological data. A Feather consists of diverse microscopic structures that include the rachis, barbs and barbules, which can, in modeling terms, be represented by curves. In this research, the Bezier curve is used. The methods used to generate the colour patterns of peacock tail Covert Feathers, which can be applied to Feathers with similar features from different species, are developed and presented.
Chinawat Vilasineewan - One of the best experts on this subject based on the ideXlab platform.
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model of peacock tail Covert Feather based on its microscopic structure
KMITL-Science and Technology Journal, 2013Co-Authors: Chinawat Vilasineewan, Suchada Siripant, Wina MeckvichaiAbstract:This article presents a mathematical model called “the ridge model”, which is used to create peacock tail Covert Feathers based on the relationships among the morphological data. A Feather consists of diverse microscopic structures that include the rachis, barbs and barbules, which can, in modeling terms, be represented by curves. In this research, the Bezier curve is used. The methods used to generate the colour patterns of peacock tail Covert Feathers, which can be applied to Feathers with similar features from different species, are developed and presented.
Suchada Siripant - One of the best experts on this subject based on the ideXlab platform.
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model of peacock tail Covert Feather based on its microscopic structure
KMITL-Science and Technology Journal, 2013Co-Authors: Chinawat Vilasineewan, Suchada Siripant, Wina MeckvichaiAbstract:This article presents a mathematical model called “the ridge model”, which is used to create peacock tail Covert Feathers based on the relationships among the morphological data. A Feather consists of diverse microscopic structures that include the rachis, barbs and barbules, which can, in modeling terms, be represented by curves. In this research, the Bezier curve is used. The methods used to generate the colour patterns of peacock tail Covert Feathers, which can be applied to Feathers with similar features from different species, are developed and presented.
Waite, Josiah Mark - One of the best experts on this subject based on the ideXlab platform.
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Aerodynamic modeling of a 2-dimensional airfoil with a Covert-inspired deployable flap using a discrete vortex method
2017Co-Authors: Waite, Josiah MarkAbstract:Unmanned aerial vehicles are expected to fulfill increasingly complex mission requirements but are limited by their inability to efficiently perform high-angle-of-attack maneuvers at low Reynolds numbers, while birds seem to perform these maneuvers with little effort. Birds use a passively-deployed Feather called the Covert Feather to correct for flow reversal over their wings during high-angle-of-attack maneuvers, thereby delaying the onset of stall. The overall research goal is to extend the understanding of the Covert Feather's role during flight in nature and learn from it to increase the mission adaptability and agility of engineered aerial vehicles during high-angle-of-attack maneuvers and during gust. This thesis presents experimental lift results that show the benefits of attaching a Covert-inspired flap to the suction side of an airfoil. Results from a CFD solver are compared to the experimental results and show good agreement. Furthermore, this work reports on the development of a low-order discrete vortex model meant to predict the lift of an airfoil with a Covert-inspired flap. Results show that the discrete vortex model is able to reproduce the experimental results for certain flap deflection angles
