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Two experiments for measuring specific viscoelastic cohesive zone parameters
(Texas A&M University, 2002)
A micromechanical model for a viscoelastic cohesive zone has been previously formulated and based on a continuum mechanics model of the damage zone ahead of the crack tip in a polymer solid. The scale of the cohesive zone ...
Optimal command generation for maneuvering the space station
(Texas A&M University, 2001)
The objective of this research is to obtain near minimum-fuel and minimum-time maneuver commands for large-angle maneuvers for the international space station. Attitude and angular velocity waypoints are generated using ...
Fabrication and characterization of porous NiTi Shape Memory Alloy by elevated pressure sintering
(Texas A&M University, 2002)
Shape Memory Alloys (SMAs) have emerged as a class of materials with unique thermal and mechanical properties that have found numerous applications in various engineering fields. Even beyond the shape memory characteristics ...
Structured Adaptive Model Inversion control with fault tolerance and actuator position limits
(Texas A&M University, 2002)
Structured Adaptive Model Inversion (SAMI) is a model reference adaptive control formulation that takes advantage of the dynamical structure of the state-space descriptions of a large class of systems. Most dynamic systems ...
Design of cooperative mobile robot system: a low-cost test-bed and an example application
(Texas A&M University, 2002)
Implementation of cooperative robot systems in search, exploration, or delivery tasks can potentially provide advantages over a single robot system. For example, better performance, fault tolerance through agent redundancy, ...
Systems integration and upgrade of an Engineering Flight Simulator
(Texas A&M University, 2002)
This thesis presents the system integration and upgrade of the Texas A&M Flight Mechanics Laboratory Engineering Flight Simulator (EFS). This upgrade replaced the previous EFS, a simplistic design that did not resemble ...
Realizability of Reynolds stress and rapid pressure-strain correlation models in turbulence
(Texas A&M University, 2003)
In this thesis, the issue of Reynolds stress realizability is addressed in detail. For the first time, the direct connection between the realizability of rapid pressure-strain correlation and Reynolds stress realizability ...
A new attitude determination approach using split field of view star camera
(Texas A&M University, 2002)
A novel split field of view star tracker is being developed for the EO-3 GIFTS mission (2004). The camera is designed to be autonomously self-calibrating, and capable of a rapid/reliable solution of the lost in space problem ...
Modeling and control of a PowerSail
(Texas A&M University, 2002)
The PowerSail concept is a relatively new concept, still in the conceptual stage but does promise a practical solution to the growing power-needs of today's high-performance satellites. PowerSail is a proposed concept ...
Design and implementation of a shape memory alloy actuated reconfigurable wing
(Texas A&M University, 2002)
The unique thermal and mechanical properties exhibited by shape memory alloys (SMAs) present exciting design possibilities in the field of aerospace engineering. When properly trained, SMA wires act as linear actuators ...