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 52 for “"ROV"”.
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In Service Above Ground Storage Tank Inspection with a Remotely Operated Vehicle (ROV)
… critical review of currently available ROVs showed that it would be difficult to procure such a vehicle and so it was decided to develop a new ROV, where aspects of operational environment (use in different petrochemical fluids), high lateral stability as well as advantageous design with …
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Mechanical design of a contra-rotating propeller assembly for a small underwater ROV
… a small underwater remotely operated vehicle (ROV), with the intent of commissioning a production run at a later time. The desired production rate was greater than one assembly per seven hour day with one machinist, at a material cost of less than $600 per assembly. Lastly, the design had to be …
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Bedrock target analysis for ROV rockdrill sampling and existing sample stratigraphic and mineralogical verification (BeTar_drill)
… echosounding) and Remotely Operated Vehicles (ROVs). Here, updated high-resolution bathymetric data, coupled with bedrock samples that have been drilled in-situ and a series of video transects spread out across the PBC have been used to develop methods for offshore geological ‘fieldwork’, …
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The characterisation of magnetic couplings and the development of a thruster module for an ROV
… for a Remotely Operated Underwater Vehicle (ROV). The dissertation begins with an introduction to the Seahog ROV developed at the University of Cape Town's Robotics and Agents Research Laboratory (RARL). The history, relevance and features of commercial ROVs are discussed in chapter two to …
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The Eyeball ROV : an underwater Remotely Operated Vehicle featuring advances in rotational actuation, communication, and localization
… for a spherical Remotely Operated Vehicle (ROV) with a camera, called the Eyeball ROV due to motions similar to the human eye, is presented in this thesis. The ROV features an actuation scheme that utilizes a two-axis gimbal for changing the location of the center of mass of the ROV. This …
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Acoustically Controlled Remotely Operated Undersea Vehicles: A Quantitative Analysis
… to alter an existing remotely operated vehicle (ROV) system. A vehicle reliant on a tethered connection to an operator requires adaptation to an untethered acoustically controlled vehicle. This project provides a tradespace exploration based in simulation of factors which limit untethered ROV …
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Development of the power distribution system and communications hub for an underwater remotely operated vehicle
… generation underwater remotely operated vehicle (ROV) produced by the University of Cape Town’s Robotics and Agents Research Laboratory (RARL). The ROV was designed and built in response to a request from the Department of Zoology for an ROV to aid their oceanic research. The two generations that …
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Securing Internet Routing: Measuring and Improving the Resource Public Key Infrastructure
… authenticity through Route Origin Validation (ROV). However, its effectiveness remains limited by partial adoption, misconfigurations, and collateral routing effects. This dissertation conducts a comprehensive study of RPKI deployment and proposes practical methods to strengthen ROV security. …
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Human factors engineering in sonar visual displays
… verge of equipping remotely operated vehicle (ROV) pilots with a three-dimensional (3-D), real-time display incorporating data from a wide variety of sensors including sonar (sound navigation and ranging), cameras, and lasers. Effective collection, computation, and presentation of this data to …
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Hybrid state estimators for the control of remotely operated underwater vehicles
… on the JASON JUNIOR Remotely Operated Vehicle (ROV). The second approach is the use of a mobile, platform-mounted, acoustic net in conjunction with a platform tracking system. This second investigation used the JASON ROV as the basis for the simulation work. As motivation, some of the …
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Thruster Fault Diagnosis and Accommodation for Overactuated Open-Frame Underwater Vehicles
… vehicles. The remotely operated vehicles (ROVs) considered in this thesis have four thrusters for motion in the horizontal plane with three controllable degrees of freedom (DoF). Due to the redundancy resulting from this configuration, for the case of a partial fault or a total fault in a …
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The dynamic modelling and development of a controller for a general purpose remotely operated underwater vehicle
… UCT SEAHOG Remotely operated underwater vehicle (ROV) is developed, including estimation of the rigid body, hydrodynamic and hydrostatic properties of the robot. A single state thruster model is developed and verified according to real life test data. A closed-loop speed controller is developed …
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Technology strategy : real options in research, development and engineering
… environments using real options valuation (ROV) concepts. It proves that the often-used discounted cash flow (DCF) techniques do not properly capture the uncertainty and flexibility of platform projects in technology-intensive industries. First the thesis presents the technology strategy …
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Design of a Robotic Arm Manipulator Camera Unit for Mini Underwater Remotely Operated Vehicles
… and claws. Cameras are the main method for providing operator feedback to the surface as they enable an operator to accurately maneuver or handle objects from thousands of feet away. Although large ROVs have cameras attached to their robotic arms for closer inspection of objects, mini ROVs do …
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Patterns and potential environmental drivers of mesophotic communities of the warm temperate shelf of the Amathole Region, South Africa
… region, using a Remotely Operated Vehicle (ROV). This study piloted the application of the Australian developed CATAMI classification scheme to annotate images collected by ROV in South Africa. Data were collected on the ACEP: Imida Frontiers project on board the RV Phakisa during January …
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A Financial Model to Assist New Therapeutics Development Decision Making
… lattice method based Real Options Valuation (ROV) technique to evaluate Aduhelm, a recent high-profile failure in the biotech industry, and compare the valuation with Discounted Cash Flow (DCF) and Decision Tree (DT) methods. All three models were able to generate similar overall predictions …
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Strategic decision analysis for transportation systems
… of a strategic project, but real options value (ROV) is an effective tool to do it. We next examine the theoretical correctness of the real options as applied to a transportation project. The critical question is whether we can create a portfolio that replicates the payoffs of options even if we …
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Millipede-Inspired Locomotion for Rumen Monitoring through Remotely Operated Vehicle
… the development of a remotely operated vehicle (ROV) for rumen monitoring to improve our understanding of microbiology, and real-time physical changes and correlations with health. This interest is being driven from the desire to improve the safety and efficiency of food production by improving …
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Highly maneuverable spherical robots for underwater applications
… to underwater remotely operated vehicle (ROV) inspection are very laborious, if possible at all. Current ROVs have difficulty navigating and effectively surveying these systems because walls and extrusions throughout the environment easily damage the external appendages that propel and …
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Design of a controllable pitch underwater thruster system
… propeller system suitable for retrofit into an ROV is designed and built. The system is designed for maximal pitch angle bandwidth with low actuator power consumption.
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