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Now showing items 1-10 of 11
A method for on-line water current velocity estimation using Lol-cost autonomous underwater vehicles
(Massachusetts Institute of Technology, 2020)
Advances in the miniaturization of microelectronics has greatly contributed to the proliferation of small, low cost autonomous underwater vehicles (AUVs). These affordable vehicles offer organizations a flexible platform ...
A planned approach to high collision risk area
(Massachusetts Institute of Technology, 2020)
This thesis examines the transition of a vessel from the open ocean, where collisions are rare, to a high risk and heavy traffic area such as a Traffic Separation Scheme (TSS). Previous autonomy approaches generally view ...
Field deployable dynamic lighting system for turbid water imaging
(Massachusetts Institute of Technology, 2011)
The ocean depths provide an ever changing and complex imaging environment. As scientists and researches strive to document and study more remote and optically challenging areas, specifically scatter-limited environments. ...
Modeling wind forcing in phase resolving simulation of nonlinear wind waves
(Massachusetts Institute of Technology, 2010)
Wind waves in the ocean are a product of complex interaction of turbulent air flow with gravity driven water surface. The coupling is strong and the waves are non-stationary, irregular and highly nonlinear, which restricts ...
Quantification of the spatial and temporal evolution of stratified shear instabilities at high Reynolds number using quantitative acoustic scattering techniques
(Massachusetts Institute of Technology, 2015)
The spatial and temporal evolution of stratified shear instabilities is quantified in a highly stratified and energetic estuary. The measurements are made using high-resolution acoustic backscatter from an array composed ...
Field measurements of a swell band, shore normal, flux divergence reversal
(Massachusetts Institute of Technology, 2011)
Throughout this thesis we will discuss the theoretical background and empirical observation of a swell band shore normal flux divergence reversal. Specifically, we will demonstrate the existence and persistence of the ...
A study of ocean wave statistical properties using nonlinear, directional, phase-resolved ocean wave-field simulations
(Massachusetts Institute of Technology, 2010)
In the present work, we study the statistics of wavefields obtained from non-linear phase-resolved simulations. The numerical model used to generate the waves models wave-wave interactions based on the fully non-linear ...
Demonstration of passive acoustic detection and tracking of unmanned underwater vehicles
(Massachusetts Institute of Technology, 2018)
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 ...
Scattering of the low-mode internal tide at the Line Islands Ridge
(Massachusetts Institute of Technology, 2015)
The scattering of low-mode internal tides by ocean-floor topography is extensively studied through analytical models and field observations at the Line Islands Ridge (LIR). An existing Green function method is utilized to ...
Modifiable stability and maneuverability of high speed unmanned underwater vehicles (UUVs) through bioinspired control fins
(Massachusetts Institute of Technology, 2020)
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 ...