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 1184 for “"unmanned"”.
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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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Trusted Unmanned Aerial System Operations
Proving the correctness of autonomous systems is challenged by the use of non-deterministic artificial intelligence algorithms and ever-increasing lines of code. While correctness is conventionally determined through analysis and testing, it is impossible to train and test the system for all …
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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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Scalable Autonomous Operations of Unmanned Assets
… been great theoretical advances in the region of Unmanned Aerial Vehicle (UAV) autonomy, applications of those theories into real world are still hesitated due to unexpected disturbances. Most of UAVs which are currently used are mainly, strictly speaking, Remotely Piloted Vehicles (RPA) since …
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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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Hybrid Formation Control of Unmanned Helicopters
… control framework for the formation of unmanned helicopters as a cooperative task. This control structure has been constructed in two main steps. First, to have an autonomous flying system, a hierarchical hybrid control structure is developed for a single unmanned helicopter to capture …
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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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Adaptive control of Unmanned Aerial Systems
… for application to hardware flight platforms. Unmanned aerial systems (UAS) provide a unique opportunity for the transition of adaptive controllers from theory to practice. The small, unmanned aerial vehicles (UAVs) examined in this thesis offer a low-cost, low-risk stepping stone between …
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Design of a unmanned aerial vehicle
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.
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Performance optimization for unmanned vehicle systems
Technological advances in the area of unmanned vehicles are opening new possibilities for creating teams of vehicles performing complex missions with some degree of autonomy. Perhaps the most spectacular example of these advances concerns the increasing deployment of unmanned aerial vehicles (UAVs) …
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Robust planning for unmanned underwater vehicles
… selection between predetermined waypoints for unmanned underwater vehicles under uncertainty. The problem is first formulated as a mixed-integer optimization model and subsequently uncertainty is addressed using a robust optimization approach. Solutions were tested through simulation and …
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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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Text Localization for Unmanned Ground Vehicles
Unmanned ground vehicles (UGVs) are increasingly being used for civilian and military applications. Passive sensing, such as visible cameras, are being used for navigation and object detection. An additional object of interest in many environments is text. Text information can supplement the …
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Modelling and control of unmanned ground vehicles
The thesis focuses on issues of vehicle modelling incorporating wheel-terrain interaction and low-level control design taking into account uncertainties and input time delay. Addressing these issues is of significant importance in achieving persistent autonomy for outdoor UGVs, especially when …
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Research on the Unmanned Aerial Vehicle Design
The thesis is concerned with the design and testing of a mini tail sitter VTOL UAV. The design consists of a Duct System with a single Propeller Engine coupled with Four Internal Aerofoil Rotor Flap (Designed for counter Gyro-scopic Effect) and four Rudder-vators Flight Controls (Design for Pitch …
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Onboard Video Stabilization for Unmanned Air Vehicles
<p>Unmanned Air Vehicles (UAVs) enable the observation of hazardous areas without endangering a pilot. Observational capabilities are provided by on-board video cameras and images are relayed to remote operators for analysis. However, vibration and wind cause video camera mounts to move and can …
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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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Remote Terrain Navigation for Unmanned Air Vehicles
There are many applications for which small unmanned aerial vehicles (SUAVs) are well suited, including surveillance, reconnaissance, search and rescue, convoy support, and short-range low-altitude perimeter patrol missions. As technologies for microcontrollers and small sensors have improved, so …
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