Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Flapping Wings"”.
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Shape and Structural Optimization of Flapping Wings
… shape and structural optimization studies on flapping wings for micro air vehicles. The design space of the optimization includes the wing planform and the structural properties that are relevant to the wing model being analyzed. The planform design is parameterized using a novel technique …
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Flapping wings for dual aerial and aquatic propulsion
… aerial/aquatic propulsion using a single set of flapping wings, offering an existence proof for favorable ow physics. Flapping wings thereby demonstrate a large force envelope, with capabilities far beyond the limits of static airfoil section coefficients, purely by changing the wing motion …
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Three Dimensional Unsteady Flow and Active Morphing Effect in Flapping Wings
… we ignore the significant differences b etween flapping
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HIGH-FIDELITY MODELING AND PHYSICS OF BIO-INSPIRED MORPHING AND FLAPPING WINGS
Bio-inspired morphing and flapping wings have the potential to produce superior aerodynamic performance through the flexibility effect. The emerging engineering requirements and the fundamental understanding of biological flight have motivated the development of a high-fidelity three-dimensional …
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Characterization of Flexible Flapping Wings and the Effects of Solar Cells for Miniature Air Vehicles
Enhancing the performance of Flapping Wing Miniature Air Vehicles (MAVs) requires reducing the weight and total energy loss while increasing the efficiency. This thesis investigates an approach to reduce total energy loss through an energy harvesting technology, flexible solar cells. These cells …
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The aerodynamic and structural study of flapping wing vehicles
… aerodynamic and structural study carried out on flapping wings and flapping vehicles. Theoretical and experimental investigation of aerodynamic forces acting on flapping wings in simple harmonic oscillations is undertaken in order to help conduct and optimize the aerodynamic and structural design …
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Flight And Symbolic Modeling Of A 3D Printed Ornithopter
… and analysis of lift forces produced by wings flapping in air. First, a method was developed to 3D print functional flapping wings. The use of 3D printing technology has greatly expanded the possibilities for wing fabrication, allowing wing shapes and structures to replicate those of real …
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An Analytical Investigation of Flapping Wing Structures for Micro Air Vehicles
An analytical model of flapping wing structures for bio-inspired micro air vehicles is presented in this dissertation. Bio-inspired micro air vehicles (MAVs) are based on insects and hummingbirds. These animals have lightweight, flexible wings that undergo large deformations while flapping. …
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The Near Wake of a European Starling
… the bird of the present study and other birds or flapping wings. Time series of measurements have been expressed as composite wake plots which relate to segments of the wing beat cycle for various spanwise locations in the wake. The wake composites invoke Taylor’s Frozen Flow Hypothesis. The …
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DESIGN AND CONTROL OF A HUMMINGBIRD-SIZE FLAPPING WING MICRO AERIAL VEHICLE
Flying animals with flapping wings may best exemplify the astonishing ability of natural selection on design optimization. They evince extraordinary prowess to control their flight, while demonstrating rich repertoire of agile maneuvers. They remain surprisingly stable during hover and can make …
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Design and construction of an autonomous ornithopter
… the subject of flying vehicles propelled by flapping wings, also known as ornithopters, has been an area of interest because of its application to micro aerial vehicles (MAVs). These miniature vehicles seek to mimic small birds and insects to achieve never before seen agility in flight. This …
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A Study on the Control, Dynamics, and Hardware of Micro Aerial Biomimetic Flapping Wing Vehicles
… is the original design of the first airplanes. Flapping wings hold much engineering promise with the potential to produce lift and thrust simultaneously. In this research, modeling and simulation of a flapping wing vehicle is generated. The purpose of this research is to develop a control …
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Supermaneuverable perching
… attributed to the intricate morphology of the wings, tail, feathers and overall sensory motor system of the animal. In this thesis we demonstrate, on real hardware, that using only an approximate model of the post-stall aerodynamics in combination with principled and novel tools in optimal …
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Optimization of the Aerodynamics of Small-scale Flapping Aircraft in Hover
<p>Flapping flight is one of the most widespread mean of transportation. It is a complex unsteady aerodynamic problem that has been studied extensively in the past century. Nevertheless, by its complex nature, flapping flight remains a challenging subject. With the development of micro air …
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Towards achieving power autonomy in soft-actuated micro aerial robots
… actuator (DEA) and generates lift force through flapping wings, a similar mechanism found in flying insects. First, we implemented a dynamic model to optimize the robot components for pairing with an improved DEA to generate a higher lift force. The robot achieved a peak lift-to-weight ratio of …
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Numerical and experimental study on the ability of dynamic roughness to alter the development of a leading edge vortex
… high maneuvering military aircraft, and flapping wings. Dynamic stall occurs when an aerodynamic lifting device, such as an airfoil, wing, or turbomachine blade, undergoes a rapid pitching motion. It also occurs on lifting devices that are impulsively started at high angles of attack. …
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Modeling and Control of Flapping Wing Robots
… schemes such as ones which use rotary or flapping wings for propulsion. While the engineering of rotary wing aircraft has seen significant advancement, the complex physics behind flapping wing aircraft remains to be fully understood. Some studies suggest flapping wing aircraft can be more …
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Multilayer Ionic Transducers
… to biological muscles and their large flapping displacement capabilities we are studying the possibility of their use in flapping Micro Air Vehicle (MAV) application, as engines, controllers and sensors. The FEA modeling technique capable is used to design two ionic polymers actuated …
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A 3-Dimensional Evaluation of Wing Movement in Ground Birds During Flap-Running and Level Flight: An Otogenetic Study
… are only beginning to grasp the intricacies of flapping flight. Birds create aerodynamic forces by manipulating the fluid environment of air by beating their wings. The question remains, how do they perform such a wide range of locomotor behaviors (e.g. takeoff, horizontal, flap-running) with …
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A 3-Dimensional Evaluation of Wing Movement in Ground Birds During Flap-Running and Level Flight: An Otogenetic Study
… are only beginning to grasp the intricacies of flapping flight. Birds create aerodynamic forces by manipulating the fluid environment of air by beating their wings. The question remains, how do they perform such a wide range of locomotor behaviors (e.g. takeoff, horizontal, flap-running) with …
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