Browsing by Department "Aerospace Engineering"
Now showing items 121-140 of 153
Plenoptic BOS: Combining a Plenoptic Camera with the Background Oriented Schlieren Technique
(2016-12-07)
The background oriented schlieren (BOS) technique is a method of observing the refraction of light rays passing through a density varying medium. When used with a conventional imaging system, this technique captures a ...
A Predictive Autorotation Entry Analysis Using Bayesian Multi-Model Estimation Detection
(2017-11-29)
Improvements to achieving helicopter autorotation in an event of engine or driveshaft failure is an issue that has and always will be present in the engineering landscape. Questions include, “how much of a performance hit ...
Preliminary Design Optimization of an Amphibious Aircraft
(2011-08-02)
An amphibious aircraft combines the speed and range benefits of a conventional aircraft with the ability to land and takeoff on open water. There are other appealing factors to operating an amphibious aircraft including ...
Propeller Design and Optimization Using a Robust Genetic Algorithm and a Computationally Efficient Solver
(2022-03-28)
A computationally efficient and reliable propeller design tool has been constructed using an advanced real coded Genetic Algorithm (GA) and a mid-fidelity potential flow solver. The GA constructs a population of propeller ...
Propeller Performance Analysis and Multidisciplinary Optimization Using a Genetic Algorithm
(2007-12-15)
A propeller performance analysis program has been developed and integrated into a Genetic Algorithm for design optimization. The design tool will produce optimal propeller geometries for a given goal, which includes ...
Rapid Missile System Characterization Using Computational Intelligence
(2014-05-15)
There exist many physical relationships between dynamic systems that humans can infer
data from where an exact science may not be possible or plausible to apply. The imprecision
or inaccuracy of attempted models and ...
A Reduced Element Map Representation and Applications: Map Merging, Path Planning, and Target Interception
(2017-07-25)
Modern autonomous systems require complex and heavy computations. The complexity can be reduced by eliminating or integrating redundant information. In the case of mobile vehicles, occupancy grid map representations are ...
Resolution and Boundary Placement Effects on Discontinuous Galerkin Simulations of Counter-rotating Vortex Interaction in a Confined Domain
(2013-11-08)
The wakes of fixed-wing and rotary-wing aircraft present some of the most complex and challenging problems for numerical simulation, as fully capturing the interaction of the various vortices and coherent structures requires ...
Scene Generation and Target Detection for Hardware-in-the-Loop Simulation
(2009-04-20)
Hardware-in-the-Loop simulations are useful in developing and testing missile components at a lower cost than experimental tests. Accurate results require the missile's optical sensor be stimulated by an artificial ...
Shape Memory Alloy Robotic Truss
(2008-08-15)
The development, design, and analysis of a Shape Memory Alloy Robotic Truss (SMART) actuator is presented in this research paper. SMART is a three-degree of freedom actuator capable of large rotary and bending displacements ...
Simultaneous Localization and Planning of Cooperative Air Munitions via Dynamic Programming
(2008-05-15)
This work centers on the real-time trajectory planning for the cooperative control of two aerial munitions in a planar setting. One munition strikes the stationary ground target and the other will serve as an observer. ...
Single Camera 3D Measurement of a Shock Wave-Turbulent Boundary Layer Interaction
(2017-04-21)
This paper explores the 3D structure of an unswept fin generated shock wave-turbulent boundary layer interaction (SBLI). A Mach 2 flow encounters an unswept fin at an angle of attack of 15 degrees which causes an inviscid, ...
Solid Rocket Motor Internal Flow Solutions with FlightStream
(2021-07-13)
This thesis seeks to advance the state of the art for conceptual and preliminary design of
solid propellant rocket motors by adapting surface vorticity solution methods to the internal
ballistics problem. The practical ...
Spacecraft Relative Motion Applications to Pursuit-Evasion Games and Control Using Angles-Only Navigation
(2015-05-29)
In the first part, applied linear quadratic (LQ) differential game theory to derive linear control laws for orbit pursuit-evasion (PE) problem and extended LQ game theory to nonlinear PE game using the state-dependent ...
Stability Analysis of a Segmented Free-wing Concept for UAS Gust Alleviation in Adverse Environments
(2009-08-03)
High altitude, long endurance (HALE) aircraft feature large wing spans and
have very low wing loadings resulting in sensitivity to turbulence. While turbulence
is usually quite low in the stratosphere where HALE aircraft ...
A Statistical Model for Liquid Propellant Rocket Engine Dry Weight
(2019-08-09)
The principle of similitude is applied to liquid propellant rocket engine dry weight using a statistical approach to produce a conceptual design level model. The argument of similitude is extended from basic physics scaling ...
Study of aerodynamic interactions in counter-rotating coaxial rotors
(2023-12-06)
Counter-rotating coaxial rotors (CCR) are ubiquitous in emerging next-generation configurations, demonstrating enhanced performance metrics such as increased forward-flight speed, flight range, and payload capabilities ...
Study of the Ballistic Capabilities of a Tethered Satellite System
(2012-05-04)
This thesis is an investigation into the ballistic capabilities of a Tethered Satellite System (TSS) when the sub-satellite is released from the system. This topic is of particular interest because TSS could be potentially ...
A Study of the Nonlinear Acoustic Response of Area-contractions and Sense-lines
(2017-12-08)
Rocket and gas turbine engine combustion instabilities, which lead to rapid engine failure through enhanced heat transfer rates and high-cycle fatigue, continue to be a serious concern for engineers. Experimental pressure ...
System Identification of General Aviation Aircraft Using the Filter Error Technique
(2007-12-15)
An overview of some past and modern applications of system identification techniques
to aircraft is presented in this thesis, which traces progress and accomplishments in the
field of system identification - especially ...