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 40 for “"unmanned underwater vehicles"”.
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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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Fault-Tolerant Control of Unmanned Underwater Vehicles
Unmanned Underwater Vehicles (UUVs) are widely used in commercial, scientific, and military missions for various purposes. What makes this technology challenging is the increasing mission duration and unknown environment. It is necessary to embed fault-tolerant control paradigms into UUVs to …
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Route optimization under uncertainty for Unmanned Underwater Vehicles
… reduce the risk service members endure by using unmanned vehicles. These unmanned vehicles will, over time, become more independent and trustworthy in our operational military. The goal of this thesis is to improve the intelligence an unmanned vehicle has in its decision making to keep up with …
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Development of a snorkel for unmanned underwater vehicles
The development of unmanned underwater vehicles (UUV) has provided a bevy of opportunities for the exploration of the ocean. However, one limitation has kept UUVs from truly becoming mass produced, its limited range. The problem with traditional snorkel designs built for submarines is that they are …
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Use of an asymmetric propeller for unmanned underwater vehicles
… the suitability of an asymmetric 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 …
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Decision algorithms for Unmanned Underwater Vehicles during offensive operations
The field of research involving autonomous vehicles has expanded greatly over the past decade. This thesis addresses the case of a system of Unmanned Underwater Vehicles (UUVs) operating in littoral areas in an offensive capacity. A series of complementary algorithms were designed to collect …
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Biomimetic improvement of the maneuvering qualities of unmanned underwater vehicles
… maneuvering performance of a typical autonomous underwater vehicle, the REMUS 100 AUV. We are introducing dorsal-like fins on the AUV that can be erected to alter its maneuvering hydrodynamic coefficients, and hence affect the transient and steady-state turning response. In order to study …
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Demonstration of passive acoustic detection and tracking of unmanned underwater vehicles
In terms of national security, 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 …
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Demonstration of passive acoustic detection and tracking of unmanned underwater vehicles
In terms of national security, 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 …
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A priori and on-line route optimization for unmanned underwater vehicles
The U.S. 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 …
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Development and validation of a conceptual design program for unmanned underwater vehicles
… Navy will increasingly rely on high-endurance unmanned underwater vehicles (UUVs) to support successful operations in a challenging threat environment. Undoubtedly, this naval strategy will necessitate versatile UUV systems that fulfill a broad spectrum of customer-generated requirements. This …
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Advances in passive acoustic detection, localization, and tracking applied to unmanned underwater vehicles
… localization, and 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 …
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Advances in Passive Acoustic Detection, Localization, and Tracking Applied to Unmanned Underwater Vehicles
… localization, and 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 …
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Modifiable Stability and Maneuverability of High Speed Unmanned Underwater Vehicles (UUVs) Through Bioinspired Control Fins
Underwater Vehicles generally have control fins located only near their aft end, for making controllable changes in directions. This design allows for stability of control; but, the turns are typically large in comparison to the vehicle’s body length. Some bony fish, such as tuna, however, have …
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Modifiable stability and maneuverability of high speed unmanned underwater vehicles (UUVs) through bioinspired control fins
Underwater Vehicles generally have control fins located only near their aft end, for making controllable changes in directions. This design allows for stability of control; however, the turns are typically large in comparison to the vehicle body length. Some bony fish, such as tuna, on the other …
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Evaluation and Characterization Testing of Liquid Fuel Cell Chemistry for Applications in Unmanned Underwater Vehicles
Previous Unmanned Undersea Vehicle (UUV) powering has focused primarily on improved efficiency and energy density. However, these gains are often offset by the need for additional buoyant volume, and drag penalties associated with this larger volume. While fuel cells have been proposed and …
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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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Disruptive innovation and naval power : strategic and financial implications of unmanned underwater vehicles (UUVs) and long-term underwater power sources
… building brown-water capabilities. Unmanned systems, such as unmanned airborne drones, are proving pivotal in facing new battlefield challenges. Unmanned underwater vehicles (UUVs) are emerging as the Navy's seaborne equivalent of the Air Force's drones. Representing a low-end …
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An assessment of reverse electrodialysis for application to small-scale aquatic systems
… as a power source for remote sensing devices and unmanned underwater vehicles, with a specific focus on the Arctic Ocean. A parameter sweep is developed using MATLAB in order to estimate the ideal dimensions and flow rates for an RED stack with respect to its volumetric power density. Unlike …
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Fabrication of a SWATH vessel scale model for seakeeping tests using rapid prototyping methods
… of a Small Waterplane Area, Twin Hull (SWATH) Unmanned Surface Vehicle (USV) that will be used primarily for dynamic seakeeping testing in the MIT Tow Tank. The model represents a design conceived by Stefano Brizzolara, which will be used for launching, recovering, and servicing Unmanned …
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