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 19 of 19 for “"concept exploration"”.
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Response surface methods applied to submarine concept exploration
… ship's life-cycle cost is determined during the concept exploration phase which places an importance in the methodology used by the designer to select the concept design. But trade-off studies are guided primarily by past experience, rules-of-thumb, and designer preference. This approach is ad …
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Improved robustness formulations and a simulation-based robust concept exploration method
… on the performance of the product. In the Robust Concept Exploration Method (RCEM) this approach is facilitated with additionally giving the designer the possibility to search for a compromise between the desired performance and a satisfying robustness. The current version of the RCEM, however, …
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Integrating response surface methods and uncertainty analysis into ship concept exploration
Thesis (Nav.E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.
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Powering through the turn : finding time for concept exploration before industry stagnation
The dichotomy of exploration and exploitation has been used in literature for many years to distinguish the needs of exploring new innovation/creating new markets versus exploiting existing capabilities/markets. This concept has been studied across various disciplines, such as organizational …
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Vehicle concept exploration and avionics architecture design for a fast package delivery system
… sensitive to vehicle speed, the optimal vehicle concept was determined to be a Mach 6 hypersonic aircraft. Due to the small payload weight (200 lb) the overall vehicle size and cost are highly sensitive to equipment weight. Therefore substantial savings could be realized if the aircraft were …
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Methods for Naval Ship Concept Exploration Interfacing Model Center and ASSET with Machinery System Tools
… In their analysis they developed 23 ship concepts, only 7 of which were variants of medium size surface combatants (MSC,21,000-26,000 MT). The report to Congress was based on a cost analysis and operational effectiveness analysis of these variants. The conclusions drawn were only based on …
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Manning Analysis in Naval Ship Concept Design
… is largely influenced by decisions made during concept design. In recent years the US Navy has undertaken numerous initiatives to reduce total ownership cost. This has prompted particular interest in reducing manning, as this is the largest single expenditure in total ownership cost. Normally …
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Design of spacecraft for exploration of the Moon and Mars
In this thesis, I develop the conceptual design of the spacecraft required for human-Lunar and human-Mars exploration. The requirements for these vehicles are derived in the context of the NASA Concept Exploration & Refinement project. Similarly, the concepts generated are intended to operate …
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Manning and Automation Model for Naval Ship Analysis and Optimization
… is largely determined by decisions made during concept design. Consequently, reliable manpower estimates need to be included early in the design process, preferably in concept design. The ship concept exploration process developed at Virginia Tech uses a Multi-Objective Genetic Optimization to …
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A Human-Centered Framework for Oncological Healthcare System Modeling Applied to Mobile Radiation Delivery
… was to use Monte Carlo simulation techniques for concept exploration. The second project was to capture patient and physician stakeholder needs through targeted surveys using the Theory of Planned Behavior. Finally, an early-generation system model based on an agent-based modeling approach was …
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A method for tradespace exploration of systems of systems
… systems engineering, particularly for SoS concept design. Qualitative and heuristic-based guidance is available in the literature, but there is a need for a method that will allow decision makers to quantitatively compare diverse multi-concept SoS designs on an equal basis in order to …
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A Parametric Model for Predicting Submarine Dynamic Stability in Early Stage Design
… and control module that can be used in the concept exploration phase of design. The purpose of the module is to determine the hydrodynamic coefficients/derivatives and stability characteristics of a given design. Two tools, GEORGE and CEBAXI and LA_57, were used to model a submarine, …
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Modeling of Distributed Naval Ship Systems using Architecture Flow Optimization
… ship design processes must evolve to embrace the concept of a System of Systems being the only way to achieve affordable capability in our future fleets. This thesis bridges the gap between the physical architecture of components within a ship and the way in which they are logically connected to …
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Refinement of Surface Combatant Ship Synthesis Model for Network-Based System Design
… and ship synthesis model for naval ship concept design. The system architecture framework decomposes the system of systems into three intersecting architectures: physical, logical, and operational to describe the spatial and functional relationships of the system together with their …
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Improved Sailboat Design Process and Tools Using Systems Engineering Approach
This research provides a detailed and systematic update of the traditional sailboat design process, with specific attention being paid to the tools used for evaluation purposes, and in doing so creates an improved and optimized design process for sailboats. More specifically, this report seeks to …
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Investigating the Use of Biologically Inspired Design Tools in a Student CubeSat Design Team Through Workshop User Experiences
… the sequence, participants generally developed conceptual understanding more readily than full applied proficiency. Functional decomposition supported problem framing, analogical transfer supported biological concept exploration, and BioTRIZ supported early-stage refinement of promising ideas. …
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Enhancing Innovation in Technical Teams: A Study of Design Thinking and Systems Architecture Integration
… beyond solution evaluation and into divergent concept exploration space. Additional tools and skills support are needed to assist these technical experts in this new approach. NASA's Aeronautics Research Mission Directorate (ARMD) is dedicated to transforming aviation to meet the nation's and …
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Automatic Annotation Of Database Images For Query-by-concept
… than ever. Query by Example (QBE) and Query by Concept (QBC) are among the most popular query models. The former model accepts example images as queries and searches for similar ones based on low-level features such as colors and textures. The latter model allows queries to be expressed in the …