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 29 for “"flapping flight"”.
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Neuroinspired control strategies with applications to flapping flight
… central pattern generators (CPGs) to control flapping-flight dynamics. The key idea here is dimensional reduction - we want to convert complicated interactions of many degrees of freedom into a handful of parameters which have intuitive connections to the overall system behavior, leaving the …
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Unsteady Aerodynamic and Aeroelastic Analysis of Flapping Flight
… unsteady aerodynamic and aeroelastic analysis of flapping flight under various kinematics and flow parameters is presented in this dissertation. The main motivation for this study arises from the challenges facing the development of micro air vehicles. Micro air vehicles by requirement are compact …
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Modeling and Approximation of Nonlinear Dynamics of Flapping Flight
… These forces result from the interaction of the flapping motion of the wing and the surround- ing air. These forces generate lift and drag during flapping flight regime. As a result, they play a significant role in the description of the physics that underlies such systems. In this research we …
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RoboBat: dynamics and control of flapping flight micro aerial vehicles
Flapping flight micro aerial vehicles (MAVs) are of interest to the aerospace and robotics communities for their maneuverability in comparison to tradition fixed wing and rotary aircraft. However they present numerous challenges in the fields of dynamics, stability and control. This thesis examines …
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Trajectory optimization and data-driven modeling for robotic bat flapping flight
Planning flight trajectories is essential for practical application of flying systems. This topic has been well studied for fixed and rotary winged aerial vehicles, but far fewer works have explored it for flapping systems. Trajectory planning requires a model that is both accurate and …
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Analyzing the complexity of bat flight to inspire the design of flapping-flight drones
With their exceptionally maneuverable flapping flight, bats could serve as a model for enhancing the flight abilities for future drones. However, bat flight is extremely complex and there are many engineering restrictions that prevent a flapping-flight drone from replicating the many degrees of …
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Discovering the Complex Aerodynamics of Flapping Flight with Bio-kinematics Using Boltzmann and Eulerian Methods
… for the same kinematics in forward flight. The final focus of the dissertation is the first simulation of a morphologically accurate wing using kinematics described in the literature.
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Mechanics of Flapping Flight: Analytical Formulations of Unsteady Aerodynamics, Kinematic Optimization, Flight Dynamics and Control
A flapping-wing micro-air-vehicle (FWMAV) represents a complex multi-disciplinary system whose analysis invokes the frontiers of the aerospace engineering disciplines. From the aerodynamic point of view, a nonlinear, unsteady flow is created by the flapping motion. In addition, non-conventional …
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Effect of frontal gusts and stroke deviation in forward flapping flight and deconstructing the aerodynamics of a fruit bat
… wing conformation have on the fluid dynamics of flapping flight. The primary motivation is to better grasp the fundamental fluid phenomena driving efficient flapping flight in the Reynolds number regime of birds, bats, and man made fliers of similar scale. The CFD solver (GenIDLEST) used is a …
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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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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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A 3-Dimensional Evaluation of Wing Movement in Ground Birds During Flap-Running and Level Flight: An Otogenetic Study
… in ground birds during flap-running and Level Flight: an ontogenetic study Chair: Dr. Kenneth P. Dial The science of animal flight requires the quantification of wing movement over a range of behaviors. Despite numerous studies of avian locomotion, we are only beginning to grasp the intricacies …
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A 3-Dimensional Evaluation of Wing Movement in Ground Birds During Flap-Running and Level Flight: An Otogenetic Study
… in ground birds during flap-running and Level Flight: an ontogenetic study Chair: Dr. Kenneth P. Dial The science of animal flight requires the quantification of wing movement over a range of behaviors. Despite numerous studies of avian locomotion, we are only beginning to grasp the intricacies …
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A Study on the Control, Dynamics, and Hardware of Micro Aerial Biomimetic Flapping Wing Vehicles
<p>Biological flight encapsulates 400 million years of evolutionary ingenuity and thus is the most efficient way to fly. If an engineering pursuit is not adhering to biomimetic inspiration, then it is probably not the most efficient design. An aircraft that is inspired by bird or other biological …
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Simulations of a passively actuated oscillating airfoil using a discontinuous Galerkin method
… flow, outperforming any current small engineered flapping vehicle. Thus, engineers are inspired to investigate the flapping dynamics present in nature to further understand the non-traditional flow aerodynamics in which they operate. Undeniably the success of biological flapping flight is the …
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Flapping Wing Flight Dynamic Modeling
Highly agile, hover capable flapping wing flight is a relatively new area of study in engineering. Researchers are looking to flapping flight as a potential source for the next generation of reconnaissance and surveillance vehicles. These systems involve highly complicated physics surrounding the …
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Gait and Morphology Optimization for Articulated Bodies in Fluids
… of fish-like robots, and experiments on a flapping wing robot. Novel contributions were made in every focus. The first focus was on input waveform optimization. This goal of this research was to develop a means by which the optimal input waveforms can be selected to vibrationally stabilize …
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The Effect of Butterfly Inspired Scales on Wing Tip Vortex Development
… since it performs the longest known butterfly flight migration. This experiment focuses on the scale patterning found on the wing tips, where scales are three times the size of the traditional scales that coat the wing surface. It was hypothesized that the long wing tip scales of the Monarch …
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Modeling and Analysis for Optimization of Unsteady Aeroelastic Systems
… second part, the unsteady aerodynamic aspects of flapping micro air vehicles (MAVs) are modeled. This modeling is required for evaluation of performance requirements associated with flapping flight. The extensive computational resources and time associated with the implementation of high-fidelity …
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The Rise of Modern Avian Flight: Wing Movement and Joint Mobility Within Ornithurae
How and when avian powered flight arose has intrigued scientists for well over a century. Birds have a remarkable fossil record demonstrating their macroevolutionary transition from dinosaurs to birds during the Mesozoic Era. Thus, Mesozoic fossils offer us a unique opportunity to study the …
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