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 42 for “"unmanned ground vehicles"”.
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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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A Prototype Polarimetric Camera for Unmanned Ground Vehicles
Unmanned ground vehicles are increasingly employing a combination of active sensors such as LIDAR with passive sensors like cameras to perform at all levels of perception, which includes detection, recognition and classification. Typical cameras measure the intensity of light at a variety of …
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Perception and mapping for unmanned ground vehicles in unstructured environments
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-12-01
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Hazard avoidance for high-speed rough-terrain unmanned ground vehicles
High-speed unmanned ground vehicles have important applications in rough-terrain. In these applications unexpected and dangerous situations can occur that require rapid hazard avoidance maneuvers. At high speeds, there is limited time to perform navigation and hazard avoidance calculations based on …
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Autonomous Convoy Study of Unmanned Ground Vehicles using Visual Snakes
Many applications for unmanned vehicles involve autonomous interaction between two or more craft, and therefore, relative navigation is a key issue to explore. Several high fidelity hardware simulations exist to produce accurate dynamics. However, these simulations are restricted by size, weight, …
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Localization And Mapping Of Unknown Locations And Tunnels With Unmanned Ground Vehicles
… the shelf (COTS) software platform to support unmanned ground vehicles (UGVs) exploring the complex environment of tunnels, to test the platform within a simulation environment, and to validate the architecture through field testing. Developing this platform will enhance the U. S. Army …
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Trajectory Tracking Control of Unmanned Ground Vehicles using an Intermittent Learning Algorithm
… cost of billions of dollars. Autonomous driving vehicles have been one solution to this problem because of their huge impact on efficiency, pollution, and human safety. Also, extensive research has been carried out on control design of vehicular platoons because a further improvement in traffic …
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The Effects of Symbol Size and Workload Level on Status Awareness of Unmanned Ground Vehicles
… operator control unit to indicate the status of unmanned ground vehicles (UGVs). Three sizes of symbols were studied. The symbols subtended 20, 40, and 69 minutes of arc corresponding to 0.116, 0.233, and 0.400 inches high when viewed at a distance of 20 inches from a touch screen. Twelve …
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Supervisory Autonomous Control of Homogeneous Teams of Unmanned Ground Vehicles, with Application to the Multi-Autonomous Ground-Robotic International Challenge
<p>There are many different proposed methods for Supervisory Control of semi-autonomous robots. There have also been numerous software simulations to determine how many robots can be successfully supervised by a single operator, a problem known as fan-out, but only a few studies have been conducted …
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Development of a Tow Capacity Test Device for Small Unmanned Vehicles
Unmanned ground vehicles (UGVs) will increasingly be used for tasks such as retrieving injured soldiers from a battlefield, transporting supplies, and towing other small vehicles and payloads. To date, the unmanned test community has not standardized on an apparatus or test operating procedure …
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Autonomous UAV-UGV robot collaboration for exploration and mapping of unknown environments
… of unknown environments that use multiple Unmanned Ground Vehicles (UGVs). An Unmanned Aerial Vehicle (UAV) is introduced into the multirobot system to overcome the challenges of relative localization and obstacle detection. A novel method is proposed for autonomously determining the UGVs’ …
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Stochastic approaches to mobility prediction, path planning and motion control for ground vehicles in uncertain environments
The ability of autonomous or semi-autonomous unmanned ground vehicles (UGVs) to rapidly and accurately predict terrain negotiability, generate efficient paths online and have effective motion control is a critical requirement for their safety and use in unstructured environments. Most techniques …
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Human-machine interaction for unmanned surface systems
… technologies for human-robot teams operating as unmanned surface systems (USS). An pilot role was found to be the most prevalent in the USS-related literature but additional human roles were determined to likely be necessary (e.g., Mission Specialist} though were not documented; interface needs …
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The Impact of Reliability in Conceptual Design - An Integrated Trade-off Analysis
… models to estimate the systemreliability of Unmanned Ground Vehicles using knowledge and data from similar systems. Traditional reliability approaches often require detailed knowledge of a system and are used in later design stages as well as development, operational test and evaluation, and …
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Multispectral Image Labeling for Unmanned Ground Vehicle Environments
… image labeling system with emphasis on Unmanned Ground Vehicles(UGVs). UGVs operating in unstructured environments face significant problems detecting viable paths when LIDAR is the sole source for perception. Promising advances in computer vision and machine learning has shown that …
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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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Persistent Monitoring with Energy-Limited Unmanned Aerial Vehicles Assisted by Mobile Recharging Stations
… problem of planning a tour for an energy-limited Unmanned Aerial Vehicle (UAV) to visit a set of sites in the least amount of time. We envision scenarios where the UAV can be recharged along the way either by landing on stationary recharging stations or on Unmanned Ground Vehicles (UGVs) acting as …
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A Method for Modeling and Prediction of Ground Vehicle Dynamics and Stability in Autonomous Systems
A future limitation of autonomous ground vehicle technology is the inability of current algorithmic techniques to successfully predict the allowable dynamic operating ranges of unmanned ground vehicles. A further difficulty presented by real vehicles is that the payloads may and probably will …
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IRIS: Intelligent Roadway Image Segmentation
… of roadway navigation and obstacle avoidance for unmanned ground vehicles has typically needed very expensive sensing to operate properly. To reduce the cost of sensing, it is proposed that an algorithm be developed that uses a single visual camera to image the roadway, determine where the lane of …
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