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Now showing items 11-20 of 55
Risk-based treatment of uncertainty in trade space exploration : application via Monte Carlo simulation on a manned, mini-submersible model
(Massachusetts Institute of Technology, 2018)
In design, modeling and simulation are commonly used to answer questions of interest as it is both inefficient and expensive to physically build and evaluate numerous possibilities. Any modeling effort aims to build the ...
Toward robust active semantic SLAM via Max-Mixtures
(Massachusetts Institute of Technology, 2020)
In a step towards the level of autonomy seen in humans, this work attempts to emulate a high level and low level approach to world representation and short term adaptation. Specifically, this work demonstrates an implementation ...
New approaches to the integration of organizational maintenance and failure data during submarine maintenance planning
(Massachusetts Institute of Technology, 2019)
Planning for maintenance periods for U.S. Navy submarines is difficult due to schedule and cost constraints, operating cycles, and logistical concerns. Organizational maintenance and failure data is vital to understanding ...
Design and assessment of a super high speed, hybrid hydrofoil/SWATH crew boat
(Massachusetts Institute of Technology, 2014)
This thesis presents the preliminary design and assessment of Wavecutter, an innovative super high speed, hybrid hydrofoil/SWATH crew boat. The intended mission of the vessel is the very-fast transportation of crew and ...
Modeling brake specific fuel consumption to support exploration of doubly fed electric machines in naval engineering applications
(Massachusetts Institute of Technology, 2016)
The dynamic operational nature of naval power and propulsion requires Ship Design and Program Managers to design and select prime movers using a much more complex speed profile rather than typical of commercial vessels. ...
Hydrophobic coatings for film boiling based drag reduction on a torpedo model
(Massachusetts Institute of Technology, 2015)
Previous research has shown that porous, hydrophobic surfaces exhibit a dramatic reduction in critical heat flux (CHF), the amount of heat over a surface area required to initiate film boiling. Film boiling is characterized ...
Design and analysis of US Navy shipbuilding contract architecture
(Massachusetts Institute of Technology, 2015)
Contracting for US Navy ship procurement is complex due several factors such as budgetary and political concerns, sole or near sole source environments, and long lead-time construction. In the current climate of shrinking ...
Multi-attribute tradespace exploration for US Navy surface ship survivability: a framework for balancing capability, survivability, and affordability
(Massachusetts Institute of Technology, 2016)
In a political environment of austerity, the importance of understanding the design tradeoffs for new naval ship concept designs cannot be understated. A combination of a tightened shipbuilding budget, large high-priority ...
Design and testing of a pan-tilt mechanism for severe environments
(Massachusetts Institute of Technology, 2016)
U.S. Navy ships have non-rotating radar and electronic warfare devices installed, which are often supported and trained by two-axis gimbals. In current shipboard solutions the payloads are often placed on a platform above ...
Design and numerical analysis of an unconventional surface-piercing propeller for improved performance at low and high speeds
(Massachusetts Institute of Technology, 2017)
Traditional propellers operate fully submerged, with cavitation limited as much as possible in order to minimize its disruptive and damaging consequences. Conversely, supercavitating propellers operate in an encompassing ...