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 56 for “"VTOL"”.
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VTOL controls for shipboard landing
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1979.
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Design and manufacturing of a VTOL Micro Aerial Vehicle
… The purpose of this thesis was to develop a 10" VTOL Micro Aerial Vehicle capable of high-speed forward flight. The innovative design incorporates a pair of counter-rotating, variable pitch propellers enclosed in a protective duct structure. Independent control of propeller pitch provides thrust …
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Aerodynamic study of a small, ducted VTOL aerial vehicle
The Perching Unmanned Aerial Vehicle (PUAV) is a 9-inch diameter ducted vertical takeoff and landing reconnaissance vehicle with the capability of fast-forward cruise flight. Currently in the development stage, the program is envisaged to yield a man-portable craft that a foot soldier can use to …
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Investigation of Control Effectors for Ducted Fan VTOL UAVs
Ducted fan VTOL UAVs are currently being designed for use by the Army for surveillance and reconnaissance in the battlefield. The vehicle tested in this research is part of the Honeywell MAV program. Able to be carried in a backpack by a single soldier, it has a duct diameter of 11.5-in. and weighs …
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Conceptual Design Methodology for the Fan-in-Wing VTOL Aircraft
… cruise speeds and Vertical TakeOff and Landing (VTOL) capability. However, despite years of interest and documented improvements in lift-fan technology, there exists little in the way of an adequate theory for conceptual design of a fan-in-wing aircraft. To address this issue, a general …
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Development of a Miniature VTOL Tail-Sitter Unmanned Aerial Vehicle
… of a miniature Vertical Take-Off and Landing (VTOL) tail-sitter Unmanned Aerial Vehicle (UAV) prototype is presented in detail. Classic aircraft design methods were combined with numerical analysis to estimate the aircraft performance and flight characteristics. The numerical analysis employed …
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A Numerical Vortex Approach To Aerodynamic Modeling of SUAV/VTOL Aircraft
… of tail-sitter vertical take-off and landing (VTOL) aircraft, where the propeller slipstream is the primary source of air flow past the wings in some flight conditions. The algorithm is presented, and results compared with published experimental data.
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Guidance and Control System for VTOL UAVs operating in Contested Environments
… system for vertical take-off and landing (VTOL) autonomous unmanned aerial vehicles (UAVs) such that they may map complex environments that may be hostile. The first part of this thesis presents an autonomous guidance system. For goal selection, the map is partitioned around the presence of …
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Lateral control system design for VTOL landing on a DD963 in high sea states
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and, (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1982.
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A comparative study of the STOL and VTOL type aircraft in the take-off regime
Thesis: M.S., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 1960
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A Framework of a Power Management System for a Hybrid Electric VTOL Aircraft using Optimal Control
… takeoff and landing unmanned aerial vehicle (VTOL UAV) is assessed using an optimal control framework for the most energy-efficient and time-efficient trajectories. The UAV is equipped with a modular hybrid propulsion system (MHPS) where the electrical and carbon-fuel system components are …
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Heat Transfer Assessment of Aluminum Alloy Corrugated Naval Ship Deck Panels under VTOL Aircraft Thermal Loads
… thermal loads of Vertical Take-off-and Landing (VTOL) capable aircraft has become a question of interest with the introduction of new primarily aluminum alloy ships to the U.S. Naval Fleet. This study seeks to provide an initial investigation of this question by examining the transient transfer …
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Robust Optimal Control of a Tailsitter UAV
Vertical Takeoff and Landing (VTOL) Unmanned Aerial Vehicles (UAVs) possess several beneficial attributes, including requiring minimal space to takeoff, hover, and land. The tailsitter is a type of VTOL airframe that combines the benefits of VTOL capability with the ability to achieve efficient …
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Modeling and Control of Dual-Motored Tail-Sitting Flying Wing Using a Fuzzy Logic Pid Controller
… The hybrid vertical take-off and landing, VTOL, UAV is one aircraft that presents a potential solution to the classic trade-off of the traditional VTOL's range and endurance limitations versus the fixed wing's required infrastructure. An aircraft known as the Flite Test Spear is used to …
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Hybrid Electric Distributed Propulsion for Vertical Takeoff and Landing Aircraft
… and control for vertical takeoff and landing (VTOL) aircraft applications. Specifically, this research focuses on embedded distributed electric propulsion systems, for which the aerodynamic forces and moments are inextricably linked to power input.</p> <p>This effort begins by characterizing …
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Transitions Between Hover and Level Flight for a Tailsitter UAV
<p>Vertical Take-Off and Land (VTOL) Unmanned Air Vehicles (UAVs) possess several desirable characteristics, such as being able to hover and take-off or land in confined areas. One type of VTOL airframe, the tailsitter, has all of these advantages, as well as being able to fly in the more …
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The Futures of Flight
… The emergence of Vertical Takeoff and Landing (VTOL) aircraft, however, represents one potential future with the opportunity to enhance the human relationship with flight. This thesis proposes a regional infrastructure system of ‘skyports’ to support VTOL within the state of Washington. One …
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