School of Aerospace Engineering Theses and Dissertations
Original work in partial fulfillment of a graduate degree in the School of Aerospace Engineering
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Recent Submissions
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Approaches to solving the express shipment service network design problem
(Georgia Institute of Technology, 2018-07-23)Express shipment, the delivery of same-day, overnight and two-day packages, is a multi-billion dollar industry in the United States and abroad. It has become an essential part of business operations and, with the rise of ... -
Passively stable pyramid sail to deorbit small satellites
(Georgia Institute of Technology, 2018-07-18)Orbital debris is a growing problem in low-Earth orbit, especially with a number of commercial companies intending to launch hundreds to thousands of micro-satellites into this regime with the goal of providing global ... -
Acoustic damping mechanisms of half-wave resonators in a rocket engine environment
(Georgia Institute of Technology, 2018-07-16)Combustion instabilities in rocket engines are caused by coupling between the combustion processes and pressure oscillations in a combustor, and they are characterized by the frequencies and shapes of the acoustic modes ... -
Development of a finite state coaxial rotor dynamic inflow model
(Georgia Institute of Technology, 2018-07-18)Accurate modeling of rotor inflow dynamics in flight simulations is crucial for rotorcraft performance and handling qualities evaluations. Both Pitt-Peters and Peters-He inflow models are used to predict induced inflow ... -
A state machine architecture for aerospace vehicle fault protection
(Georgia Institute of Technology, 2018-06-13)Because of their complexity and the unforgiving environment in which they operate, aerospace vehicles are vulnerable to mission-critical failures. In order to prevent these failures, aerospace vehicles often employ Fault ... -
A stochastic agent approach (SAA) for mission effectiveness
(Georgia Institute of Technology, 2018-05-15)A process for using stochastic and probabilistic agent decision-making was proposed. This process is employed to conduct a Mission Space Exploration to evaluate a wide assortment of possible matériel and non-matériel ... -
Spacecraft visual navigation using appearance matching and multi-spectral sensor fusion
(Georgia Institute of Technology, 2018-05-17)The approach taken in this research is to apply terrestrial techniques to improve spacecraft navigation. First, appearance matching is used as a common framework for both object identification and pose estimation and is ... -
A methodology for forecasting impact of demand response on capacity expansion planning
(Georgia Institute of Technology, 2018-05-16)In parallel to tighter energy regulations and increasing demand for emissions reduction, the Department of Energy (DOE) has set a goal to reduce energy consumption in the building sector to 50% of 2010 levels by 2030. This ... -
Strained turbulence and low-diffusivity turbulent mixing using high performance computing
(Georgia Institute of Technology, 2017-07-28)In this thesis, turbulent flows are studied using the method of direct numerical simulation (DNS), whereby exact governing equations are computed without modeling. Beginning with isotropic turbulence and turbulent mixing ... -
Quantifying the impacts of vehicle technologies and operational improvements on air transportation system performance
(Georgia Institute of Technology, 2017-05-31)Over the past decades, passenger demand for air transportation has grown steadily. Aviation forecasts predict a continued growth into the future at possibly higher rates. The consequent rise in number of flights would ... -
FLOW CHARACTERIZATION OF LIFTED FLAMES IN SWIRLING, REACTING FLOWS
(Georgia Institute of Technology, 2017-05-15)Swirl stabilized combustors are commonly used in gaseous fueled land-based gas turbines and liquid fueled aerospace combustors to achieve simultaneously high efficiency, low emissions, wide operability limits, and low ... -
Common proper orthogonal decomposition-based emulation and system identification for model-based analysis of combustion dynamics
(Georgia Institute of Technology, 2018-05-21)For high-performance power generation and propulsion systems, such as those of airbreathing and rocket engines, physical experiments are expensive due to the harsh requirements of operating conditions. In addition, it is ... -
Introducing the foundations of a general framework for closed-loop control in additive manufacturing via in situ measurements and semantic annotations
(Georgia Institute of Technology, 2018-04-27)During the last decade, additive manufacturing (AM) has become increasingly popular for rapid prototyping, but has remained relatively marginal beyond the scope of prototyping when it comes to applications with tight ... -
Enhanced flight vision systems: Portrayal of runway markings and sensor range effects on pilot performance
(Georgia Institute of Technology, 2018-04-26)This thesis investigates the effects of two specific sensor limitations in enhanced flight vision systems (EFVS) on general aviation pilot performance during approach and landing: sensor range and EFVS portrayal of runway ... -
A nonparametric-based approach on the propagation of imprecise probabilities due to small datasets
(Georgia Institute of Technology, 2018-04-25)Quantification of uncertainty (UQ) is typically done by the use of precise probabilities, which requires a very high level of precision and consistency of information for the uncertain sources, and is rarely available for ... -
A scalable hardware-in-the-Loop simulation for satellite constellations and other multi-agent networks
(Georgia Institute of Technology, 2018-04-30)Given the plans for satellite mega-constellations, there is a lack of rigorously tested operations and control methods for constellations larger than 30 to 50 spacecraft. The purpose of this thesis is to propose the ... -
A combined feedback controller design for active vibration suppression
(Georgia Institute of Technology, 2018-04-30)To prevent failure due to fatigue, especially in high-performance aircraft, there is a significant amount of interest in vibration suppression methods with a special focus on active vibration control methods. This thesis ... -
A hybrid Navier Stokes/vortex particle wake methodology for modeling helicopter rotors in forward flight and maneuvers
(Georgia Institute of Technology, 2018-04-11)Maneuvering flight and high-speed flight are critical design points in any rotorcraft’s operating envelope. These conditions give complex flow phenomena, creating high stresses and vibrations. To accurately predict the ... -
Integrated tasking, processing, and orbit determination for optical sensors in a space situational awareness framework
(Georgia Institute of Technology, 2018-04-06)This dissertation explores the following. Coordinating a large network of electo-optical sensors (EOS) for an effective Space Surveillance Network requires several novel capabilities. The first piece of this work involves ... -
Dynamic modeling and control of spacecraft robotic systems using dual quaternions
(Georgia Institute of Technology, 2018-04-06)As of 2014, the space servicing market has a potential revenue of $3-$5B per year due to the ever-present interest to upkeep existing orbiting infrastructure. In space servicing, there is a delicate balance between system ...
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