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 489 for “"Aerial vehicles"”.
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Dynamic Stability and Handling Qualities of Small Unmanned-Aerial-Vehicles UNMANNED-AERIAL-VEHICLES
<p>General aircraft dynamic stability theory was used to predict the natural frequencies, damping ratios and time constants of the dynamic modes for three specific small UAVs with wingspans on the scale from 0.6 meters to 1.2 meters. Using USAF DatCom methods, a spreadsheet program for predicting …
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Motion Coordination of Aerial Vehicles
The coordinated motion control of multiple vehicles has emerged as a field of major interest in the control community. This thesis addresses two topics related to the control of a group of aerial vehicles: the output feedback attitude synchronization of rigid bodies and the formation control of …
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RF Fingerprinting Unmanned Aerial Vehicles
<p>As unmanned aerial vehicles (UAVs) continue to become more readily available, their use in civil, military, and commercial applications is growing significantly. From aerial surveillance to search-and-rescue to package delivery the use cases of UAVs are accelerating. This accelerating popularity …
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Locating Unmanned Aerial Vehicles (UAVs)
… the popularity and usefulness of Unmanned Aerial Vehicles (UAVs) or drones, they are not allowed to fly in some areas without prior permission from the Federal Aviation Administration (FAA). However, many incidents of UAVs breaching such restrictions have been reported. A UAV location …
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Control of cooperative unmanned aerial vehicles
… small cooperative unmanned autonomous quadrotor aerial vehicles. A new approach is proposed, for the modeling of the system’s dynamics using linearized Piecewise AffineModels. The Piecewise Affine dynamic–models cover a large part of the quadrotor’s flight envelope while also taking into account …
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VERTICAL REPLENISHMENT BY UNMANNED AERIAL VEHICLES.
… system was brought to an international unmanned aerial vehicle competition and was the only helicopter which completed all the cargo transportation tasks in the competition.
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Linear Control of Unmanned Aerial Vehicles
… and control of quadrotor unmanned aerial vehicles (UAVs) operating in windy conditions, covering the complete process from raw data-driven model development to advanced control design and experimental validation. The study begins by introducing a control-oriented system …
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Coverage Planning for Unmanned Aerial Vehicles
… investigates how to plan paths for Unmanned Aerial Vehicles (UAV) for the task of covering an environment. Three increasingly complex coverage problems based on the environment that needs to be covered are studied. The dissertation starts with a 2D point coverage problem where the UAV needs …
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Computer Vision Applications for Autonomous Aerial Vehicles
<p>Undoubtedly, unmanned aerial vehicles (UAVs) have experienced a great leap forward over the last decade. It is not surprising anymore to see a UAV being used to accomplish a certain task, which was previously carried out by humans or a former technology. The proliferation of special vision …
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Unmanned Aerial Vehicles for Post Disaster Surveys
In the current built environment, structures require regular observation and maintenance. Many of these structures can be quite challenging to evaluate. The required scaffolding, lifts, or similar access facilities can become quite costly to rent and construct, and can be a long term disturbance to …
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Aggressive landing maneuvers for unmanned aerial vehicles
… enhance the operational capability of these vehicles. The features of the research include a novel approach to trajectory tracking, whereby the primary system outputs to be tracked are smoothly scheduled according to the state of the vehicle relative to its landing area. The proposed approach …
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Design and optimization of Micro Aerial Vehicles
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2003.
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Architecture and Drones: Accomodating Unmanned Aerial Vehicles
… the latter mentioned innovations is the Unmanned Aerial Vehicle (UAV), also know as drones. Like the automobile, drone technology will influence not only the way we live but also our design thinking and the components of our built environment. Along with drone's ability to fly, UAV's digital …
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Compressive strength prediction for composite unmanned aerial vehicles
A rational methodology is presented to predict the compressive strength of carbon/epoxy compression specimens and prototype production parts using the model presented by Barbero in the Journal of Composite Materials, Vol. 32, No.5/1998. The experimental technique is an adaptation of the optical …
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Design Methods for Remotely Powered Unmanned Aerial Vehicles
<p>A method for sizing remotely powered unmanned aerial vehicles is presented to augment the conventional design process. This method allows for unconventionally powered aircraft to become options in trade studies during the initial design phase. A design matrix is created that shows where, and if, …
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Flight Testing Small, Electric Powered Unmanned Aerial Vehicles
Flight testing methods are developed to find the drag polar for small UAVs powered by electric motors with fixed-pitch propellers. Wind tunnel testing was used to characterize the propeller-motor efficiency. The drag polar was constructed using data from flight tests. The proposed methods were …
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Deploying fast object detection for micro aerial vehicles
… into an object detection pipeline for a micro aerial vehicle (MAV). This work was done as part of the Defense Advanced Research Projects Agency's (DARPA) Fast Lightweight Autonomy (FLA) program with the goal of creating an autonomous MAV that could explore and map an unknown urban environment. …
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Turbochargers to small turbojet engines for uninhabited aerial vehicles
… rotorcomponents for possible Uninhabited Aerial Vehicle applications. The first program involved the performance mapping of the Garrett T2 turbocharger centrifugal compressor. The second program involved the bench testing of a small turbojet engine, the Sophia J450, at 115000 RPM, and …
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Intelligent control and path planning for unmanned aerial vehicles
Along with high-tech advances, unmanned aerial vehicles (UAVs) or drones are becoming popular in modern life. This technological trend will be expedited with UAVs being smartly employed in numerous human activities owing to the increasing advancement of learning systems. Their application also …
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System Design Methodology and Implementation of Micro Aerial Vehicles
… design and implementation process of micro aerial vehicle (MAV) systems, which are suitable for indoor missions such as search and rescue, and surveillance. The proposed MAVs seek a breakthrough in the current unmanned aircraft market, by having the ability of full mission autonomous …
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