Browsing Auburn Theses and Dissertations by Department "Mechanical Engineering"
Now showing items 41-60 of 430
Collaborative Architectures for Relative Position Estimation of Ground Vehicles with UWB Ranging and Vehicle Dynamic Models
(2022-12-09)
The relative position to neighboring vehicles is critical to ongoing autonomy efforts including
collision avoidance and path planning; therefore, it should not be fully dependent
on an external reference such as GPS. ...
Collaborative Simultaneous Tracking and Navigation with Low Earth Orbit Satellite Signals of Opportunity and Inertial Navigation System
(2022-07-26)
This thesis has not been approved for public release.
Comparative Characterization of Electronic Packaging Materials through Steady State Thermal Conductivity Measurements
(2010-07-30)
The decreasing feature size and increasing power generation of modern
electronic devices have created a need for increasingly effective and
efficient thermal management solutions to remove the high heat fluxes
being ...
A Comparison between the Mechanical Behaviors of Different Equine Articular Cartilage Surfaces
(2013-07-18)
In order to determine the stiffness and thickness of the equine articular cartilage, an indentation test and needle probe test were performed on fresh equine articular cartilage surfaces from the fetlock, carpal, and stifle ...
A comprehensive tool to prioritize multiple engineering R & D projects
(2005-12-15)
When trying to allocate funds to different projects, people encounter many situations where they need a methodology that can address the issues that arise and provide a quick solution. In the case study described in this ...
Compression Response and Modeling of Interpenetrating Phase Composites and Foam-Filled Honeycombs
(2009-08-03)
Although multiphase materials with discrete, dispersed and/or embedded phases in a matrix have been evolving over the years, there are limitations in terms of the degree of concentration of the secondary phase that can be ...
Computational and Experimental Investigation of Oil Separation from an Oil-Water Two-Phase Pipe Flow and Its Accumulation in a Subsea Dead-Leg
(2019-07-23)
Both 2- and 3-dimensional transient computational studies of two-phase turbulent flow within a horizontal channel/pipe with a vertical capped dead-leg placed downstream of an oil/water supply source simulating parts of a ...
Computational Investigation of the Influence of Novel Fins on Melting of Phase Change Materials within Shell-and-Tube Latent Heat Thermal Energy Storage Units
(2023-08-09)
Numerical investigations are carried out to analyze the melting characteristics of the phase change material (PCM, n-octadecane) in three shell-and-tube latent heat thermal energy storage (LHTES) systems. These systems ...
Considerations on Optimum Design of Micro Heat Pipe Sinks Using Water as Working Fluid
(2006-12-15)
The successful operation of RF wideband gap devices dissipating high levels of heat
flux requires effective cooling techniques. One of the most promising thermal management
strategies is the use of micro heat pipes (MHP). ...
Constitutive Model and Solder Joint Reliability Predictionsfor BGA Packages Subjected to Aging
(2015-07-28)
Isothermal aging causes detrimental changes in the microstructure, mechanical response, and failure behavior of lead free solder joints in electronic assemblies. Traditional finite element based predictions for solder ...
A Constitutive Model for Lead Free Solder Including Aging Effects and Its Application to Microelectronic Packaging
(2013-08-01)
The microstructure, mechanical response, and failure behavior of lead free solder joints in electronic assemblies are constantly evolving when exposed to isothermal aging and/or thermal cycling environments. Traditional ...
Construction of a Diesel Engine Test Stand and a Crank Angle Based Heat Release Model
(2011-11-15)
A test stand for a light duty diesel engine was constructed and used to measure both mean and crank angle based engine operating parameters. The test stand features a 1.1L Hyundai CRDi turbo-diesel engine, a Land and Sea ...
Construction Technique and Strength of Connected Regolith Bag Structures
(2007-05-15)
Masonry Arches have been used from a long time in construction of bridges, domes and other structures. They are constructed out of voussoirs and their stability is determined by drawing a funicular polygon representing ...
Control and Analysis of Air, Water, and Thermal Systems for a Polymer Electrolyte Membrane Fuel Cell
(2011-07-27)
The polymer electrolyte membrane (PEM) fuel cell is a power source that can potentially replace the internal combustion engine in vehicles of the future. When hydrogen stored in a tank and oxygen from the air chemically ...
Control of a Fuel Delivery System for Polymer Electrolyte Membrane Fuel Cells based on a Two-Phase Transient Model
(2011-07-27)
Polymer electrolyte membrane fuel cells (PEMFCs) are a type of fuel cell that converts the chemical energy released by the reaction of hydrogen (fuel) and oxygen into electrical energy and generates water and heat. The ...
Controlling the Speed of a Magnetically-Suspended Rotor with Compressed Air
(2011-04-08)
Magnetic bearing research is generally concerned with the development of the automatic control systems required to levitate a rotor, driven by either an electric motor or air turbine. The regulation of rotor speed in ...
Coupling GPS/INS and IMM Radar Tracking Algorithms for Precise Collaborative Ground Vehicle Navigation
(2018-12-07)
This thesis describes a method of collaborative ground vehicle navigation utilizing shared
radar data to provide observations during periods of GPS degradation. Navigational errors that
typically arise from degraded GPS ...
Damage Prediction of Lead Free Ball Grid Array Packages Under Shock and Drop Environment
(2007-05-15)
The fatigue and damage of solder joints and also the potential for interface failure within BGA packages are caused by thermal cycling. In case of portable electronic products, fatigue is caused by repetitive drop and shock ...
Decentralized Collaborative Navigation in Limited Observability Environments with Low Earth Orbit Satellite Signals of Opportunity between Aerial and Ground Vehicles
(2023-07-28)
A decentralized collaborative navigation algorithm known as inverse covariance intersection (ICI) is studied in the context of a group of vehicles navigating using opportunistic Doppler measurements. Signals of opportunity ...
Deep Integration of a Flight Vehicle Dynamic Model in a Vector Tracking Software Defined Receiver
(2024-01-04)
The greater occurrence of signal interference on Global Navigation Satellite Systems
(GNSS) requires additional alternative navigation solutions to provide robust, reliable localization
of flight vehicles when measurements ...