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 40 for “"Wing Design"”.
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Integral aerodynamic-structural-control wing design
The aerodynamic-structural-control design of a simplified wing and a forward-swept composite wing are studied. In the first example, the wing is modeled as a beam with a control surface near the wing tip. The torsional stiffness is the only physical property varying along the span. The aerodynamic …
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Integrated aerodynamic-structural wing design optimization
… for the simultaneous aerodynamic-structural design optimization of aircraft wings are investigated. These procedures include efficient methods for optimization and sensitivity calculations that are applied to two specific design examples. The first is a subsonic transport aircraft with a …
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Folding Solid-Membrane Wing Structure for a Micro Air Vehicle
The design of a solid-membrane folding wing for use on a tube launched micro air vehicle (MAV), and experimental wind tunnel results of the wing integrated on an engineering MAV model are presented herein. Due to the sizing and performance requirements of the MAV, the wing must provide sufficient …
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Kinematic Design and Analysis of a Morphing Wing
… optimize the flight characteristics of aircraft, wings must be designed for the specific mission an aircraft will see. An airplane rarely has one specific mission, and therefore is usually designed as a compromise to meet many flight objectives with a single wing surface. Large-scale shape change …
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Methods for delivering liquid payloads from high altitudes
As part of a military design project, further research was requested into an optimum method for delivering water from high altitude to a civilian population on the ground. This thesis explores current airdrop technology as well as three proposed methods of delivering potable water at terminal …
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Formulation of a structural model for flutter analysis of low aspect ratio composite aircraft wings
… toward a fully integrated multidisciplinary wing design synthesis by development of an appropriate structural model. The goal is to bridge the gap between highly idealized structural beam / aerodynamic strip models and the very detailed finite element and computational fluid dynamics, …
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Effective Formulations of Optimization Under Uncertainty for Aerospace Design
… uncertainty (OUU) commonly used in aerospace design—those based on treating statistical moments of the quantity of interest (QOI) as separate objectives—can result in stochastically dominated designs. A stochastically dominated design is undesirable, because it is less likely than another …
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Design and Development of Low-cost Multi-function UAV Suitable for Production and Operation in Low Resource Environments
A new flying wing design has been developed at the Unmanned Systems Lab (USL) at Virginia Tech to serve delivery and remote sensing applications in the developing world. The fully autonomous unmanned aerial vehicle (UAV), named EcoSoar, was designed with the goal of creating a business opportunity …
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Novel Airframe Design for the Dual-Aircraft Atmospheric Platform Flight Concept
… long-endurance unmanned aerial airframe was designed for the innovative Dual-Aircraft Atmospheric Platform flight concept that exploits stratospheric wind velocity gradients to remain aloft indefinitely. Classical aircraft preliminary design techniques and high-fidelity tools were used to …
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Design Optimization of a High Aspect Ratio Rigid/Inflatable Wing
… long-endurance aircraft require different design modeling from those with traditional moderate aspect ratios. High aspect-ratio, long endurance aircraft are generally more flexible structures than the traditional wing; therefore, they require modeling methods capable of handling a flexible …
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Integrated multi-disciplinary design of a sailplane wing
… techniques and payoffs of integrated aircraft design. Lifting line theory and beam theory are used for the analysis of the aerodynamics and the structures of a composite sailplane wing. The wing is described by 33 - 34 design variables which involve the planform geometry, the twist …
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Molecular phylogenetics and the evolution of high-frequency echolocation in horseshoe bats (Genus Rhinolophus)
… correspond to echolocation call frequency and wing design; and (5) The Acoustic Communication Hypothesis - echolocation frequencies evolved under selection pressure which eliminated overlap among sympatric species of rhinolophids, within the context of effective communication.
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Analysis and Design of a Morphing Wing Tip using Multicellular Flexible Matrix Composite Adaptive Skins
… model for the analysis of a morphing wing tip composed of smart materials. Much research is currently being performed within many facets of engineering on the use of smart or intelligent materials. Examples of the beneficial characteristics of smart materials might include altering a …
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Reduced Order Modeling of Flapping Wing Flight Dynamics
Flapping wing vehicles have become a compelling alternative to classical fixed or rotary wing aircraft, especially as unmanned aircraft technology focuses on smaller, more agile platforms. Flying insects provide an inspiration for the control of flapping wing platforms, using limited computational …
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Hydrodynamic Impact Analysis and Testing of an Unmanned Aerial Vehicle
… surface of the water. The tested UAV is a flying wing design constructed of expanded polypropylene foam wings with a hollowed out center-section for the avionics. Acceleration data was collected by means of LIS331 3-axis accelerometers positioned at five locations, including the wingtips. This …
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Signomial programming for aircraft design
Due to the coupled nature of aircraft system design, it is important to consider all major subsystems when optimizing a configuration. This, however, is easier said than done, particularly because each individual subsystem model can be arbitrarily complex. By restricting an optimization problem to …
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The Effect of Reducing Cruise Altitude on the Topology and Emissions of a Commercial Transport Aircraft
… for alternative commercial transonic aircraft design configurations, such as the strut- braced wing and the truss-braced wing aircraft designs, in order to improve aircraft performance and reduce the impact of aircraft emissions as compared to a typical cantilever wing design. Research …
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Aerodynamic design optimization using flow feature parameterization
Design optimization methods using high-fidelity computational fluid dynamics simulations are becoming increasingly popular in the area of aerodynamic design, sustaining the desire to make these methods more computationally efficient. Such design strategies typically define the aerodynamic product …
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Shape and Structural Optimization of Flapping Wings
… 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 called …
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Conceptual design and multidisciplinary optimisation of power device for solar powered aircraft
… airfoil was the best-chosen airfoil used for the wing design, while the empennage design, NACA 0008, was the most suitable. Hence, the latter was used for horizontal and vertical tail design with XFLR5 v6 software's aid. A novel methodology for the power device sizing was developed on MS Excel …
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