Theses and Dissertations
Measurements and observations of interfacial creep in engineering systems
(Monterey, California. Naval Postgraduate School, 2002., 2002-09)
In many applications, large shear stresses develop at interfaces between dissimilar materials during thermo-mechanical excursions, when there is a significant difference in the coefficient of thermal expansion between them. ...
FAILURE MODEL FOR FIBROUS COMPOSITES USING MULTISCALE MODELING
(Monterey, CA; Naval Postgraduate School, 2018-06)
An established multiscale model for materials is used as the basis for a failure model for fiber composites. The model’s computation is explained so that its results can be used to formulate the inputs to the failure model. ...
UPDATED APPROACH TO SHOCK FAILURE ASSESSMENT OF SHIPBOARD EQUIPMENT
(Monterey, CA; Naval Postgraduate School, 2019-12)
Naval vessels are subjected to underwater explosions that impart a mechanical shock onto the ship structure, its subsystems, equipment and crew. This violent shock loading, although not in direct contact with the ship hull, ...
Nonlinear estimation with sparse temporal measurements
(Monterey, California: Naval Postgraduate School, 2016-09)
Nonlinear estimators based on the Kalman filter, the extended Kalman filter (EKF) and unscented Kalman filter (UKF) are commonly used in practical application. The Kalman filter is an optimal estimator for linear systems; ...
An information-centric approach to autonomous trajectory planning utilizing optimal control techniques
(Monterey, California: Naval Postgraduate School, 2009-09)
This work introduces a new information-centric pseudospectral optimal control based algorithm for autonomous trajectory planning and control of unmanned ground vehicles with real-time information updates. It begins with ...
Analysis and experimentation of control strategies for underactuated spacecraft
(Monterey, California: Naval Postgraduate School, 2009-09)
A laboratory spacecraft simulator testbed is first introduced to examine the problem of multiple spacecraft interacting in close proximity. This testbed enables validation of guidance, navigation and control (GNC) algorithms ...
Simulation of the dynamic behavior of explosion gas bubbles in a compressible fluid medium
(Monterey, California. Naval Postgraduate School, 1996-12)
Data from one-dimensional (spherically symmetric) analyses was used to examine the effects of compressibility and gas energy on the dynamic behavior of an explosion gas bubble, by comparing the bubble's behavior with ...
Autonomous control of underwater vehicles and local area maneuvering
(Monterey, California. Naval Postgraduate School, 1996-09)
The major thrust of this work is the development and demonstration of new capabilities for the use of small autonomous vehicles in mine countermeasure applications. Key to the new capabilities lies in an open architecture ...
A theoretical analysis of jet deflection from plane and axisymmetric curved obstacles.
(Monterey, California. Naval Postgraduate School, 1973-12)
A class of analytical and numerical solutions to the
problem of inviscid-jet deflection from plane and axisymmetric
concave surfaces are presented. The methods of solution
for the two-dimensional cases included a novel ...
Redistribution Mechanisms and Quantification of Homogeneity in Friction Stir Welding and Processing of an Aluminum Silicon Alloy
(Monterey, California. Naval Postgraduate School, 2012-09)
The uniformity (homogeneity) of nondeforming particle distributions in a cast alloys microstructure is highly important in controlling the materials strength, ductility, and fatigue resistance. Friction stir processing ...
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