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 405 for “"Unmanned 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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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)
<p>Despite 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
… of design and control of 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 …
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VERTICAL REPLENISHMENT BY UNMANNED AERIAL VEHICLES.
… weather conditions. Thus, the development of an unmanned helicopter for vertical replenishment is presented in this thesis. The thesis covers the helicopter platform construction, dynamic modeling of the helicopter, automatic controller design, state estimation algorithms development and system …
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Linear Control of Unmanned Aerial Vehicles
… identification, 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
… dissertation 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 …
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Unmanned Aerial Vehicles for Post Disaster Surveys
… or analysis. The use of a remotely controlled unmanned vehicle is a reliable, safe and cost effective substitute for assessing structures before and after seismic, terrorist, or other destructive events.
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Aggressive landing maneuvers for unmanned aerial vehicles
… possible control approach to enable landing of unmanned aircraft systems at all attitudes, including against walls and ceilings as a way to considerably enhance the operational capability of these vehicles. The features of the research include a novel approach to trajectory tracking, whereby the …
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Architecture and Drones: Accomodating Unmanned Aerial Vehicles
… Among 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 …
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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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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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Design Of An Autopilot For Small Unmanned Aerial Vehicles
… design of an autopilot capable of flying small unmanned aerial vehicles with wingspans less then 21 inches. The autopilot is extremely small and lightweight allowing it to fit in aircraft of this size. The autopilot features an advanced, highly autonomous flight control system with auto-launch …
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Low altitude unmanned aerial vehicles (UAVs) in wireless networks
… the utilization of cellular-connected UAVs as aerial users; secondly, the deployment of a UAV as an aggregator to increase communication range and increase reliability of an Internet of Things networks with high reliability and low latency requirements; and thirdly, their integration into …
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Low altitude unmanned aerial vehicles (UAVs) in wireless networks
… the utilization of cellular-connected UAVs as aerial users; secondly, the deployment of a UAV as an aggregator to increase communication range and increase reliability of an Internet of Things networks with high reliability and low latency requirements; and thirdly, their integration into …
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EnvE:an environment for the emulation of unmanned aerial vehicles
Since the dawn of modern computation, computing devices have been steadily increasing in both performance and efficiency while decreasing in cost. This trend has produced incredibly powerful computers in tiny form factors at prices that average consumers can afford. Installing such computational …
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Modeling and adaptive control of indoor unmanned aerial vehicles
The operation of unmanned aerial vehicles (UAVs) in constrained indoor environments presents many unique challenges in control and planning. This thesis investigates modeling, adaptive control and trajectory optimization methods as applied to indoor autonomous flight vehicles in both a theoretical …
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Visibility maximization with unmanned aerial vehicles in complex environments
Unmanned aerial vehicles are used extensively in persistent surveillance, search and track, border patrol, and environment monitoring applications. Each of these applications requires the obtainment of information using a dynamic observer equipped with a constrained sensor. Information can only be …
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