Search
Now showing items 21-30 of 91
Some Techniques in the Control of Dynamic Systems with Periodically Varying Coefficients
(2009-02-23)
The goal of this dissertation is to develop control system design methods for dynamic systems with time periodic coefficients. These systems arise naturally in many branches of science and engineering. As a rule, time ...
Investigation of Lateral Performance of an ATV Tire on Natural, Deformable Surfaces
(2009-02-23)
A study is undertaken to discover links between soil-rubber interface strength,
camber, pressure and lateral performance of a front ATV tire. New tire and soil test rigs
are also designed and fabricated for the support ...
A Machine Vision and Sensing System for Braid Defect Detection, Diagnosis and Prevention During Manufacture
(2009-02-23)
The mechanical properties of braids are often quite convenient for achieving the high performance levels expected of composite materials. A favorable attribute of a braided structure is the ability for the design engineer ...
Modeling Simulation and Preliminary Experimentation on Towed Tether System
(2009-02-23)
Aero-dynamic drag forces and their effect on the path taken by a cable in a towed system are studied with the aid of an advanced computational software packages. A piece of rope (tether) is towed at the top end in a ...
Studies of the Off-Resonant Nonlinear Optical Properties of an Organic Molecular Crystal and Specific Nonconjugated Conductive Polymers
(2009-02-23)
In this dissertation, the second order nonlinear optical properties of an organic molecular crystal and the third order off-resonant nonlinear optical properties of specific nonconjugated conductive polymers have been ...
Area-Array Package Reliability Models for No-Core PCB Assemblies in Extreme Thermo-Mechanical Environments
(2009-02-23)
The trends in the electronic packaging industry are to design smaller packages that have higher complexity, and to improve package reliability while reducing costs. These needs in the packaging industry have lead to a ...
Experimental and Computational Study of Fluid Flow and Heat Transfer in the Lost Foam Casting Process
(2009-02-23)
The Lost foam casting (LFC) process has been considered as one of the most significant modern developments in casting technology. The use of polymer foam patterns allow complex shapes to be created by integrating several ...
Thermo-mechanical reliability models for life prediction of ball grid arrays on Cu-core PCBS in extreme environments
(2009-02-23)
In this work, thermo-mechanical models for reliability prediction of BGA packages mounted on Cu-core printed circuit assemblies in harsh environments have been developed. The models have been developed based on thermo-mechanical ...
Effect of a Baffle on Pseudosteady-State Natural Convection inside Spherical Containers
(2009-02-23)
Pseudosteady-state natural convection within spherical containers with and without thin baffles was studied computationally. Insulated or isothermal baffles were considered for passive management of the flow and thermal ...
Stream Function Path Planning and Control for Unmanned Ground Vehicles
(2008-09-09)
This research develops a harmonic potential field based path planner and controller. The first component of the dissertation compares several analytical and numerical potential field generation methods. To overcome ...