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 18 of 18 for “"flexible wing"”.
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Steady state performance of an elastic flexible wing
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
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Advanced flexible wing technology assessment for transport applications
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1996.
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Advanced flexible wing technology assessment for the new strategic airlifter
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
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Numerical Simulations of the Aeroelastic Response of an Actively Controlled Flexible Wing
… and controlling the response of an elastic wing in an airstream is discussed. The technique employed interactively and simultaneously solves for the response in the time domain by considering the air, wing, and controller as elements of a single dynamical system. The method is very modular, …
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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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Analysis, Design and Testing of a Wind Tunnel Model to Validate Fiber-Optic Shape Sensing Systems
… be able to take accurate shape sensing data on a flexible wing aircraft. In a joint venture between Luna Technologies Inc. and Virginia Polytechnic Institute and State University a flexible wing wind tunnel model was designed and constructed as a test article for the Luna Technologies Inc. fiber …
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Structural optimization and its interaction with aerodynamic optimization for a high speed civil transport wing
… based structural optimization procedure with flexible loads is implemented to evaluate the wing bending material weight. Static aeroelastic effects, evaluated through the comparison of rigid and flexible wing models, are found to be small in the HSCT design. The results of structural …
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Unsteady Low Reynolds Number Aerodynamics of a Rotating Wing
… formation of the LEV by evaluating the effect of wing acceleration profiles, wing root geometry, Reynolds number, and unsteady variations of pitch, 2) quantify whether high lift can be sustained at low Reynolds numbers on a rotary wing in continuous revolution, and 3) determine the effect of wing …
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Adaptive output-feedback control and applications to Very Flexible Aircraft
Very Flexible Aircraft (VFA) corresponds to an aerial platform whose flight dynamics critically depends on its flexible wing shape, and has been investigated as a potential solution to generate high-altitude low-endurance flights. The dominant presence of model uncertainties and potential actuator …
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Design, Analysis and Experimental Evaluation of 3D Printed Variable Stiffness Structures
… to fabricate, for the first time, an optimized flexible wing model with internal structures. The wing was tested in a low-speed wind tunnel to validate a robust computational model which enables the future study of the aeroelastic performance of different optimized wing models. This dissertation …
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Propeller whirl flutter analysis of the nasa all-electric X-57 through multibody dynamics simulations
… efficiency, thinner and higher aspect ratio wings are used to reduce drag along with propellers due to their high propulsion efficiency. This research presents a whirl flutter analysis of the NASA all-electric X-57 and how it influences the design of the vehicle. Multibody dynamics analysis …
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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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Propulsion By Sinusoidal Locomotion: A Motion Inspired By Caenorhabditis Elegans
… seen in snakes, fish, nematodes, or even the wings of some birds and insects. This doctoral thesis presents the study of sinusoidal locomotion of the nematode C. elegansin experiments and the application of the state-space airloads theory to the theoretical forces of sinusoidal motion. An …
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It’s Not Just a Phase: Real-Time Aeroelastic Flutter Control Optical Flow Sensing and Piezoelectric Control of Aeroelastic Flutter
… active damping and noise-canceling techniques. A flexible wing model constructed of 0.5 mm thick PETG was outfitted with two macrofiber composite (MFC) piezoelectric actuators mounted in a back-to-back configuration at the wing root. A Basler acA1300-200um camera was aimed at the free end of the …
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Integrated Multidisciplinary Design Optimization Using Discrete Sensitivity Analysis for Geometrically Complex Aeroelastic Configurations
… configurations, an initially rectangular wing with uniform NACA-0012 cross-sections was optimized; in additions, a complete Boeing 747-200 aircraft was studied. Furthermore, the current study also examines the effect of inconsistency in the order of spatial accuracy between the nonlinear …
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Stress and shape analysis of a paraglider wing
The paraglider wing consists of leading-edge booms and a keel boom joined together at the nose and a flexible sail whose surface carries the aerodynamic pressure loading. The payload is suspended beneath the wing by cables which are used to control the wing. Adjusting the length of these cables …
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The effect of wing flexibility on ride comfort in formation flight
… code was validated for both large aspect ratio wings with low frequencies in unsteady aerodynamic conditions, as well as swept wings in steady flow, using the Warren 12 wing planform as reference. The structural model was developed using both a discretization method, as well as a continuous …
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Development of Deployable Wings for Small Unmanned Aerial Vehicles Using Compliant Mechanisms
… compliant mechanisms in the design of deployable wings for small UAVs. Although deployable wings with rigid-link mechanisms have been used in the past to maintain flight endurance while minimizing required storage volume, compliant mechanisms offer many advantages in manufacturability and …