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 96 for “"Aeronautical Vehicles"”.
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Development of technologies for low-cost oceanographic unmanned aeronautical vehicles
… measurements at a high sample rate. An Unmanned Aeronautical Vehicle (UAV) could bridge this gap.<br/>This research has provided a mission-ready autopilot and ground station for future oceanographic application by the National Oceanography Centre, Southampton. A sea landing is the only available …
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Advances in Aero-Propulsive Modeling for Fixed-Wing and eVTOL Aircraft Using Experimental Data
… (eVTOL) aircraft have recently emerged as vehicles able to perform new missions and stimulate future air transportation methods. This dissertation presents several system identification research advancements for these modern aircraft configurations enabling accurate mathematical model …
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Behavioral Motivation of Prospective Mars’ Crewmembers
<p>Living in extreme climatic conditions is challenging on planet Earth which encourages researchers hoping to find life on other planets such as Mars. This research was conducted to explore the effects on human behavior and willingness to go to Mars when individuals were informed about all the …
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State of the Art of Piloted Electric Airplanes, NASA's Centennial Challenge Data and Fundamental Design Implications
<p>The purpose of this study was to determine the current state of the electric airplane as primarily defined by results from NASA's Green Flight Challenge Competition. New equations must be derived in order to determine the endurance and range for electric airplanes since the standard equations …
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Effect of Adaptive Tabs on Drag of a Square-Base Bluff Body
<p>This thesis involves the experimental wind tunnel testing of a 0.127m by 0.127m square-base bluff body to test the effectiveness of trailing edge tabulations to reduce drag in the Cal Poly 0.912m by 1.219 m low-speed wind tunnel. To accomplish this, the boundary layer was first measured on the …
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Development of a Small Unmanned Aerial Vehicle Longitudinal Model for Future Flutter Testing
<p>This thesis presents the system identification of the longitudinal motion of a small unmanned aerial vehicle with flexible characteristics. The unmanned aerial vehicle of study is an off-the-shelf aircraft with limited knowledge about the dynamic model. The first task in obtaining a model for …
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Design and Control Considerations for a Skid-to-Turn Unmanned Aerial Vehicle
The use of Unmanned Aerial Vehicles (UAVs) are rapidly expanding and taking on new roles in the military. In the area of training and targeting vehicles, control systems are expanding the functionality of UAVs beyond their initially designed purpose. Aeromech Engineering’s NXT UAV is a high speed …
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Robust Nonlinear Estimation and Control Applications using Synthetic Jet Actuators
… in flight control of small unmanned aerial vehicles (SUAVs), and could potentially lead to structural damage and catastrophic failures. LCO can be described as vibrational motions in the rocking, pitching and plunging displacements of an aircraft wing. To address this, the use of synthetic …
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Aerodynamic Trade Study of Compound Helicopter Concepts
<p>The relative performance attributes of compound helicopter concepts have been examined, including their potential for meeting the requirements of several challenging mission profiles. For each concept, which included lift and/or propulsive compounding, a suite of aerodynamic performance models …
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The Development of a Force Balance for Testing Micro Aerial Vehicles
… could produce meaningful data for micro aerial vehicles. Research was conducted to investigate the common balance configurations, and the strengths and weaknesses of each configuration were used to select the most appropriate design. The limitations of available fabrication facilities, the …
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Preliminary Design of an Asteroid Hopping Mission
<p>In 2010, NASA announced that its new vision is to support private space launch operations. It is anticipated that this new direction will create the need for new and innovative ideas that push the current boundaries of space exploration and contain the promise of substantial gain, both in …
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Battery Centric Serial Hybrid Aircraft Performance and Design Space
<p>The design space and flight envelope of a battery centric serial hybrid aircraft has been analytically derived. The formulation assumes cruising flight only and all energy available is used. The flight envelope can be generated for any conventional propeller driven serial hybrid aircraft. The …
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Homography-Based State Estimation for Autonomous Exploration in Unknown Environments
<p>This thesis presents the development of vision-based state estimation algorithms to enable a quadcopter UAV to navigate and explore a previously unknown GPS denied environment. These state estimation algorithms are based on tracked Speeded-Up Robust Features (SURF) points and the homography …
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Assessment of Iso-Ahola’s Theory of Tourism Motivation on Willingness to Fly as a Point-to-Point Suborbital Space Tourist
<p>Suborbital space tourism involves flight in an air vehicle to an altitude exceeding 100 kilometers (62 miles). This altitude is referred to as the Karman Line and the edge of space. Point-to-point space travel is transportation in an air vehicle where the vehicle flies around the earth in space …
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Structural Design of a Business Jet Winglet
<p>Structural sizing of a winglet for the Falcon 10 was performed and is presented here. The aerodynamic profile of the winglet was taken from a previous study, which predicted an increase in range of 3.3% with an estimated weight increase of 52 kg. An investigation of the current structure layouts …
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Aerodynamic and Structural Design of a Winglet for Enhanced Performance of a Business Jet
<p>The preliminary design of a winglet to improve the range and fuel burn of the Falcon 10 business jet is presented. Twelve candidate geometries were studied varying the cant angle and the span. The configuration offering the best compromise between induced drag reduction, profile drag increase …
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The Effects of Rewards on the Ability of an Autonomous UAV Controlled by a Reinforcement Learning Agent to Accomplish a Target Localization Task
<p>The need for Unmanned Aerial System (UASs) is increasing in the fields of science, security, military and others. With an increasing number of challenges faced by mankind the need for system with advance autonomous and intelligent capabilities is growing rapidly. The required intelligent …
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Aircraft De-Icing System Using Thermal Conductive Fibers
<p>The accumulation of ice on the leading edges of aircraft wing poses complications for flight control as drag is increased with a tendency for higher relative turbulence over the wing. Pre-emptive and reactive ice removal techniques have been employed in the past by electromechanical, thermal, …
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Performance Analysis of a Coaxial Helicopter in Hover and Forward Flight
<p>The performance of a coaxial rotor system has been analyzed by establishing a proper basis of comparison between a conventional single rotor and coaxial rotor. An attempt has also been made to better understand the complicated aerodynamic interactions associated with coaxial rotor wakes by using …
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Evaluation of Probabilistic Methodology for Predicting Satellite Tracking Resources
<p>This research evaluates a probabilistic methodology for estimating the ability of satellite tracking networks to provide tracking and data acquisition services to large constellations of satellites. This approach, developed by Hagar is evaluated using Monte Carlo simulations of optimal satellite …
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