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 45 for “"UUV"”.
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Oscillating Energy Harvester for UUV Applications
… energy harvester for use in a Bluefin-21 UUV. Real-world vessel acceleration data was used to optimize the harvester for four different potential energy profile configurations: free-floating, linear monostable, nonlinear monostable, and bistable. Active control was desired and two …
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Undersea navigation of a glider UUV using an acoustic communications network
… ocean sensors. An Unmanned Undersea Vehicle (UUV) can operate as a mobile node among the grid in the conduct of its own mission, using the fixed nodes as navigation reference points. The fixed grid provides a cellular communications infrastructure for command & control and data telemetry. In …
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Planning and scheduling of concurrent high-level activities for UUV mission operations
… that enables a single Unmanned Undersea Vehicle (UUV) to concurrently perform high level activities, while managing various resources in a dynamic ocean environment. Such activities may include wide area surveillance of a specified region and focused inspection tasks. Concurrent execution of …
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Real-time Autonomy and Maneuvering Simulation of an Unmanned Underwater Vehicle Near a Moving Submarine Using Actively Sampled Gaussian Process Surrogate Models
Unmanned Underwater Vehicle (UUV) maneuvering simulators have severe limitations on modeling UUV motion near a moving submarine because they are not capable of determining the complex, turbulent, hydrodynamic interactions in real time. Potential flow solvers are typically fast enough, but they …
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Hydrodynamic Interactions of an Unmanned Underwater Vehicle Operating in Close Proximity to a Moving Submarine
… and moments that an Unmanned Underwater Vehicle (UUV) experiences when operating in close proximity to a moving submarine as a result of the interactions between their potential fields and wakes. The launch and recovery of UUVs from submarines is very challenging because these hydrodynamic …
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Use of an asymmetric propeller for unmanned underwater vehicles
… propeller for unmanned underwater vehicles (UUV). The idea to utilize a single blade propeller had been pioneered in the past for aviation as an attempt to generate greater thrust, but was quickly abandoned. Recently, Woods Hole Oceanographic Institute reevaluated the concept for use on a …
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Demonstration of passive acoustic detection and tracking of unmanned underwater vehicles
… the advancement of unmanned underwater vehicle (UUV) technology has transformed UUVs from tools for intelligence, surveillance, and reconnaissance and mine countermeasures to autonomous platforms that can perform complex tasks like tracking submarines, jamming, and smart mining. Today, they play …
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Demonstration of passive acoustic detection and tracking of unmanned underwater vehicles
… the advancement of unmanned underwater vehicle (UUV) technology has transformed UUVs from tools for intelligence, surveillance, and reconnaissance and mine countermeasures to autonomous platforms that can perform complex tasks like tracking submarines, jamming, and smart mining. Today, they play …
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Route optimization under uncertainty for Unmanned Underwater Vehicles
… we assume an Unmanned Underwater Vehicle (UUV) is given tasks and must decide which ones to perform (or not perform) in which order. If there is enough time and energy to perform all of the tasks, then the UUV only needs to solve a traveling salesman problem to find the best order. We focus …
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A priori and on-line route optimization for unmanned underwater vehicles
… military considers Unmanned Underwater Vehicles (UUVs) a critical component of the future for two primary reasons - they are effective force multipliers and a significant risk-reducing agent. As the military's technology improves and UUVs become a reliable mission asset, the vehicle's ability to …
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Six degree of freedom vehicle controller design for the operation of an unmanned underwater vehicle in a shallow water environment
… loop control of an unmanned underwater vehicle (UUV) in the dynamically difficult environment of shallow water requires explicit consideration of the highly coupled nature of the governing non-linear equations of motion. This coupling between an UUV's six degrees of freedom (6 DOF) is …
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Advances in passive acoustic detection, localization, and tracking applied to unmanned underwater vehicles
… tracking (DCLT) of unmanned underwater vehicles (UUVs) in the presence of shipping traffic is a critical task for passive acoustic harbor security systems. In general, vessels can be tracked by their unique acoustic signature due to machinery vibration and cavitation noise. However, cavitation …
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Advances in Passive Acoustic Detection, Localization, and Tracking Applied to Unmanned Underwater Vehicles
… tracking (DCLT) of unmanned underwater vehicles (UUVs) in the presence of shipping traffic is a critical task for passive acoustic harbor security systems. In general, vessels can be tracked by their unique acoustic signature due to machinery vibration and cavitation noise. However, cavitation …
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Maritime intent estimation and the detection of unknown obstacles
The benefits of using Unmanned Undersea Vehicles (UUVs) in maritime operations are numerous. However, before these benefits can be realized, UUV capabilities must be expanded. This thesis focuses on improving certain aspects of the Maritime Reconnaissance and Undersea Search and Survey capabilities …
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OPERATIONAL ANALYSIS AND EARLY-STAGE DESIGN FOR NEXT GENERATION MCM THROUGH DIGITAL ENGINEERING
… where there is no unmanned underwater vehicle (UUV) present. It also found that limiting the deployment range of the UUV is of paramount importance in the scenarios where there is a UUV present.
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Disruptive innovation and naval power : strategic and financial implications of unmanned underwater vehicles (UUVs) and long-term underwater power sources
… challenges. Unmanned underwater vehicles (UUVs) are emerging as the Navy's seaborne equivalent of the Air Force's drones. Representing a low-end disruptive technology relative to traditional shipborne operations, UUVs are becoming capable of taking on increasingly complex roles, tipping the …
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Design and dynamic modeling of an unmanned underwater vehicle for submerged surface inspection exploiting hydrodynamic ground effect
… sized ellipsoidal Unmanned Underwater Vehicle (UUV) with a flattened base to house necessary sensors needed for surface inspections. The UUV is designed - both in terms of its shape and propulsion - for gliding on submerged surfaces for volumetric inspection, in addition to motion in free stream …
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A Hydrodynamic Analysis and Conceptual Design Study for an External Storage Enclosure System for Unmanned Underwater Vehicles.
Medium-sized Unmanned Underwater Vehicles (UUV) are limited in their scope of operations, range, and endurance by their relatively small energy storage capacity. The majority of commercially available medium-sized UUVs are incapable of mission operations with durations longer than 30 hours, many …
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Rex 2 : design, construction, and operation of an unmanned underwater vehicle
… practical usage of unmanned underwater vehicles (UUVs) is limited by vehicle and operation cost, difficulty in accurate navigation, and communication between the vehicle and operator. The "Rex 2" UUV employs a system design where a submersible is connected to a float at the water's surface by …
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Path planning for an autonomous vehicle
… Navy deals with an unmanned underwater vehicle (UUV), tracking an enemy submarine. In addition, marine biologists could use such a capability to allow a UUV to follow and record valuable information on certain species. Planning these paths is conceptualized as a series of network shortest path …
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