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 37 for “"Unmanned aerial vehicles (UAV)"”.
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Resilience Model for Teams of Autonomous Unmanned Aerial Vehicles (UAV) Executing Surveillance Missions
<p>Teams of low-cost Unmanned Aerial Vehicles (UAVs) have gained acceptance as an alternative for cooperatively searching and surveilling terrains. These UAVs are assembled with low-reliability components, so unit failures are possible. Losing UAVs to failures decreases the team's coverage …
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Integration of potential field theory and proportional navigation theory to autonomously guide an unmanned aerial vehicle.
… into full autonomy of machines, including Unmanned Aerial Vehicles (UAV). This thesis supports this research by surveying the methods used to guide UAVs, and developing a new method by combining potential fields, typically used for obstacle avoidance, and proportional navigation, a popular …
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Autonomous landing system for a UAV
… to achieve the autonomous shipboard landing of Unmanned Aerial Vehicles (UAV). Two main problems are addressed in this thesis. The first is to establish communication between the UAV's ground station and the Autonomous Landing Flight Control Computer effectively. The second addresses the design …
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Mapping shrub biomass in a boreal continental fen
… thesis summarizes how allometric equations and unmanned aerial vehicles (UAV) can be used to map AGB across a 2-hectare peatland site. Prior to using UAVs to measure AGB, accurate field measurements are required to calibrate and validate the UAV-AGB model. We developed allometric equations for …
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FEASIBILITY OF INDIRECT FIRE FOR COUNTERING SWARMS OF SMALL UNMANNED AERIAL SYSTEMS
Counter-Unmanned Aerial Systems (C-UAS) technology struggles to keep up with the evolving threat posed by drones. This threat is compounded by the advent of Small Unmanned Aerial Systems (SUAS) operating together to accomplish tasks as an autonomous entity known as a swarm. The miniaturization of …
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Testing and development of a shrouded gas turbine engine in a freejet facility
… for high speed propulsion on low cost Unmanned Combat Aerial Vehicles (UCAV), Unmanned Aerial Vehicles (UAV) and missiles. The possibility of a turbojet providing thrust at subsonic conditions and the ramjet section providing the thrust in the supersonic regime exists. The combined …
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Learning to fly : computational controller design for hybrid UAVs with reinforcement learning
Hybrid unmanned aerial vehicles (UAV) combine advantages of multicopters and fixed-wing planes: vertical take-off, landing, and low energy use. However, hybrid UAVs are rarely used because controller design is challenging due to its complex, mixed dynamics. In this work, we propose a method to …
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UAV mission planning under uncertainty
With the continued development of high endurance Unmanned Aerial Vehicles (UAV) and Unmanned Combat Aerial Vehicles (UCAV) that are capable of performing autonomous fiunctions across the spectrum of military operations, one can envision a future military in which Air Component Commanders control …
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Collaborative Unmanned Air and Ground Vehicle Perception for Scene Understanding, Planning and GPS-denied Localization
… searching for radiation sources with unmanned aerial vehicles (UAV) and unmanned ground vehicles (UGV) in unknown and unstructured environments. The three main contributions of this dissertation are: (1) An approach to overcome the challenges associated with simultaneously trying to …
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Development of UAV-based lidar crop height mapping system
… and fast data collection. As technology of Unmanned Aerial Vehicles (UAV) advanced, the airborne LiDAR system became a promising remote sensing based method for non-destructive crop height measurement. The objective of this study was to develop a UAV-based LiDAR system for crop height …
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The applications of autonomous systems to forestry management
… Science, Robotics and Autonomous Systems, Unmanned Aerial Vehicles (UAV), Unmanned Aerial Systems (UAS), Product Design and Development, Light Detection and Ranging (LiDAR)
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UAV Communications: Spectral Requirements, MAV and SUAV Channel Modeling, OFDM Waveform Parameters, Performance and Spectrum Management
Unmanned Aerial Vehicles (UAV) are expected to be deployed both by government and industry. Rules for integrating commercial UAVs into a nation's airspace still need to be defined, safety being the main concern. As part of this thesis, the communication needs of UAVs as important requirement for …
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A Biomimetic, Energy-Harvesting, Obstacle-Avoiding, Path-Planning Algorithm for UAVs
… two new approaches to energy harvesting for Unmanned Aerial Vehicles (UAV). One method is based on the Potential Flow Method (PFM); the other method seeds a wind-field map based on updraft peak analysis and then applies a variant of the Bellman-Ford algorithm to find the minimum-cost path. …
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Distributed approaches for coverage missions with multiple heterogeneous UAVs for coastal areas.
… high-level framework proposal for heterogeneous aerial, fixed wing teams of robots, which operate in complex coastal areas. Recent advances in the computational capabilities of modern processors along with the decrement of small scale aerial platform manufacturing costs, have given researchers …
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Integrated strain actuation in aircraft with highly flexible composite wings
… performance, three representative conventional vehicles using aileron control are modeled. The vehicles are based on fielded unmanned aerial vehicles (UAV), representing low, medium, and high altitude classes. The ISA wings are modeled by replacing some of the passive composite plies in with …
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A Combined Method for Vegetation Classification Based on Visible Bands from UAV Images: A Case Study for Invasive Wild Parsnip Plants
… due to low spatial resolution of the imagery. Unmanned Aerial Vehicles (UAV) can obtain ultra-high resolution (UHR) imagery and have been used for vegetation-related monitoring in both environmental and agricultural applications in recent years. In this study, UAV images captured at Lemoine …
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ADAPTIVE CONTROL DESIGN FOR QUADROTORS
Unmanned Aerial Vehicles (UAV) control has become a very important point of scientific study. The control design challenges of a UAV make it one of the most researched areas in modern control applications. This thesis specifically chooses the Quadrotor as the UAV platform. Considering the quadrotor …
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A wetland vulnerability assessment : consequences for the avian communities of saltmarshes
… methods using data from satellites and Unmanned Aerial Vehicles (UAV) for the Upper Mersey Estuary were explored. Satellite data failed to provide adequate classification due to a large spatial resolution. Object-based methods carried out on UAV data produced an accurate vegetation …
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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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Novel Use of Neural Networks to Identify and Detect Electrical Infrastructure Performance
… can improve these processes. With the use of unmanned aerial vehicles (UAVs), neural networks can identify and classify both normal functioning and damaged electrical power lines.</p> <p>This thesis will investigate the use of convolutional neural networks and low-cost unmanned aerial vehicles …
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