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Parameter Estimation Techniques for Determining Safe Vehicle Speeds in UGVs
(2008-09-09)
This thesis develops simplified equations to predict a velocity in which vehicle rollover or tire saturation occurs. These equations are functions of different vehicle parameters that are important to vehicle handling ...
Adaptive Control of a Farm Tractor with Varying Yaw Properties Accounting for Actuator Dynamics and Nonlinearities
(2008-09-09)
Two adaptive control algorithms for the automatic steering control of a farm tractor with varying hitch forces are developed. Tractors can be configured many different implements, and implements interact with the soil in ...
Finite Element Analysis of Three-Dimensional Elasto-Plastic Sinusoidal Contact and Inclusion in a Multi-Scale Rough Surface Contact Model
(2008-09-09)
Researchers have developed many models to simulate the elasto-plastic contact of spheres. However, there does not appear to exist a closed-form analytical model for elasto-plastic three dimensional sinusoidal contact. This ...
Damage Prediction of Lead Free Ball Grid Array Packages Under Shock and Drop Environment
(2008-09-09)
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 ...
Design and Analysis of Air and Coolant Control for a Polymer Electrolyte Membrane Fuel Cell
(2008-09-09)
The polymer electrolyte membrane (PEM) fuel cell is an alternative engine that can potentially replace the internal combustion engine in the vehicles of the future. When hydrogen, stored in a tank, and oxygen, from the ...
Design Optimization and Health Monitoring for Multi-Directional Composite Flywheel Energy Storage Systems
(2008-09-09)
Flywheels are used to store kinetic energy through the rotation of an inertial mass, which usually rotates at very high speeds. Generally, that energy can be extracted (using a motor-generator system) in the form of ...
Health Monitoring for Flywheel Rotors Supported By Active Magnetic Bearings
(2008-09-09)
Magnetic bearings are not a new technology in themselves, yet the control and implementation of such devices is still a budding science. Magnetic bearings are particularly attractive for some applications because of the ...
Dynamic Modeling of Polymer Electrolyte Membrane Fuel Cell Stack with 1D and 2D CFD Techniques
(2008-09-09)
The PEM fuel cell is a potential candidate for use as an alternative power source in future vehicle and power conditioning applications. The electric power, as a load, continuously varies as a function of time in the ...
Simulation, Estimation, and Experimentation of Vehicle Longitudinal Dynamics That Effect Fuel Economy
(2008-09-09)
In this thesis, longitudinal vehicle dynamics are researched with an emphasis on heavy trucks and fuel economy. Commercial vehicles display large variations in their parameters, and due to many current trends in transportation ...
Some Studies on Modeling and Simulation of a Disc Brake System for Squeal Prediction
(2008-09-09)
Most mechanical systems that involve a sliding contact experience some degree of friction induced self-excited vibration. A well known example is brake squeal which is a top concern for automotive companies, who must spend ...