Design And Analysis Of Electrical Power And Communication Systems For 3u Sealion Cubesat Mission,
2022
Old Dominion University
Design And Analysis Of Electrical Power And Communication Systems For 3u Sealion Cubesat Mission, Joseph D. Siciliano
Electrical & Computer Engineering Theses & Dissertations
Old Dominion University (ODU) Space Systems students in conjunction with the United States Coast Guard Academy (USCGA) are designing and developing a 3U Very Low Earth Orbit (VLEO) CubeSat mission aptly named SeaLion. This work specifically details the design of the Electrical Power System (EPS) and Communication System of the satellite. Electrical power in orbit is a precious commodity and must be carefully regulated and distributed to ensure the satellite’s operational health. Commonly, CubeSat electrical power is retained in orbit via outward facing solar cells and stored in onboard rechargeable batteries. This thesis proposes using non-rechargeable primary battery cells and …
Implementation Of An Extended Kalman Filter Using Inertial Sensor Data For Uavs During Gps Denied Applications,
2022
Old Dominion University
Implementation Of An Extended Kalman Filter Using Inertial Sensor Data For Uavs During Gps Denied Applications, Sky Seliquini
Mechanical & Aerospace Engineering Theses & Dissertations
Unmanned Aerial Vehicles (UAVs) are widely used across the industry and have a strong military application for defense. As UAVs become more accessible so does the increase of their applications, now being more limited by one’s imagination as opposed to the past where micro electric components were the limiting factor. Almost all of the applications require GPS or radio guidance. For more covert and longer range missions relying solely on GPS and radio is insufficient as the Unmanned Aerial System is vulnerable to malicious encounters like GPS Jamming and GPS Spoofing. For long range mission GPS denied environments are common …
A Study Of Asymmetric Supersonic Wind Tunnel Nozzle Design,
2022
Old Dominion University
A Study Of Asymmetric Supersonic Wind Tunnel Nozzle Design, Brittany A. Davis
Mechanical & Aerospace Engineering Theses & Dissertations
Achieving higher Mach numbers for private and commercial flight is a growing interest in the aerospace community. To qualify vehicles prior to flight, tests must be run in wind tunnels. Asymmetric wind tunnel nozzles are of continuing interest to the aerospace community due to their ability to change throat geometry, allowing for a range of Mach numbers to be achieved that encompasses all of the supersonic regime. The sliding block wind tunnel at Old Dominion University (ODU) is designed for a range of Mach numbers from about 1.8 to 3.5 but is limited to an upper limit of 2.8 by …
Residual Strength Estimation Of Degraded Bonded Joints Based On Non-Destructive Evaluations,
2022
Florida Institute of Technology
Residual Strength Estimation Of Degraded Bonded Joints Based On Non-Destructive Evaluations, Guilherme Garcia Momm
Theses and Dissertations
Pioneer designers acknowledged structural bonding advantages over other joining methods, sparking many aerospace applications. Nonetheless, durability issues, weak bonds, and the inability to non-destructively interrogate bond quality after-the-fact hindered widespread bonding use. These challenges also contributed to several aircraft accidents, fostering extensive related research. Firstly, we examined the bonding operational history in aviation. The challenge to simulate or experimentally reproduce bonded joints’ long-term behavior under real-life conditions magnifies the value of in-service data. Since 1944 the International Civil Aviation Organization has recommended investigating aircraft incidents/accidents. Among numerous investigation reports publicly available, we identified 73 bond-related occurrences involving type-certified aircraft registered …
Computer Vision Of Analog Gauges As An Alternative To Digital Flight Test Instrumentation,
2022
Florida Institute of Technology
Computer Vision Of Analog Gauges As An Alternative To Digital Flight Test Instrumentation, Michael William James
Theses and Dissertations
Currently, there are a couple of options to gather stick force data from flight test aircraft. Either the aircraft is instrumented with costly piezoelectric force sensors and recorders integrated into the aircraft stick, or the test pilot must use a traditional analog stick force gauge with a pointer and telltale. The conventional stick force gauge works well when the pilot has the mental and physical bandwidth to read and remember, or record, the stick force values throughout the maneuver but does not suffice when in a task saturated, high g force maneuver such as the windup turn. This project proposes …
Practical Applications Of Pressure-Fed Lox/Ch4 Rocket Engines,
2022
The University of Texas at El Paso
Practical Applications Of Pressure-Fed Lox/Ch4 Rocket Engines, James Susen Parks
Open Access Theses & Dissertations
The University of Texas at El Paso Aerospace Center is working on a family of LOX/CH4 pressure-fed rocket engines. The applications of a pressure-fed rocket engine include orbital launch vehicles and lunar ascent and descent vehicles. This dissertation focuses on the application of the CROME LOX/CH4 engines under development at UTEP. The dissertation contains three chapters on orbital launch vehicles and a fourth chapter on lunar descent/ascent vehicles. The first two chapters look at pressure-fed LOX/CH4 orbital launch vehicle design compared to an electric pump fed and a gas generator vehicle. The third chapter looks at the sensitivities in the …
Rotating Detonation Rocket Engine Fluidic Diode Injector Studies,
2022
University of Alabama in Huntsville
Rotating Detonation Rocket Engine Fluidic Diode Injector Studies, Allison Brooke Lentz
Honors Capstone Projects and Theses
No abstract provided.
Computational Plasma Modeling For Characterization Of An Atmospheric Pressure Plasma Jet,
2022
University of Alabama in Huntsville
Computational Plasma Modeling For Characterization Of An Atmospheric Pressure Plasma Jet, Declan George Brick
Honors Capstone Projects and Theses
No abstract provided.
Honor Capstone Lunar Logistics Study,
2022
University of Alabama in Huntsville
Honor Capstone Lunar Logistics Study, Owen Bradley Cox
Honors Capstone Projects and Theses
No abstract provided.
A Primer For Designing A Small Spacecraft Mission Operations Architecture,
2022
Morehead State University
A Primer For Designing A Small Spacecraft Mission Operations Architecture, Joseph M. A. Feliciano
Morehead State Theses and Dissertations
A thesis presented to the faculty of the College of Science at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science by Joseph M. A. Feliciano on April 28, 2022.
Design And Analysis Of A Pitch Controller For An Unstable Aircraft Using A Linear Quadratic Regulator,
2022
University of Alabama in Huntsville
Design And Analysis Of A Pitch Controller For An Unstable Aircraft Using A Linear Quadratic Regulator, Marco Antonio Garcia
Honors Capstone Projects and Theses
No abstract provided.
Early Warning Reentry System Comprising High Efficiency Module For Determining Spacecraft Reentry Time,
2022
Air Force Institute of Technology
Early Warning Reentry System Comprising High Efficiency Module For Determining Spacecraft Reentry Time, Robert A. Bettinger
AFIT Patents
The present invention relates to an early warning reentry system comprising a high efficiency module for determining spacecraft reentry time and a highly efficient method for determining spacecraft reentry time. The method permits more accurate, earlier spacecraft reentry time determinations using publicly available trajectory information without the need for accounting for the actual design configuration of the spacecraft in question. Thus, a module for making such determinations can easily and inexpensively be added to an early warning reentry system.
Characterizing And Predicting Human Visual Perception Of Unmanned Aerial Vehicle Gestures,
2022
University of Nebraska-Lincoln
Characterizing And Predicting Human Visual Perception Of Unmanned Aerial Vehicle Gestures, Paul Fletcher
School of Computing: Dissertations, Theses, and Student Research
Unmanned Aerial Vehicles (UAVs) are being used in public domains and hazardous environments where effective communication strategies are critical. UAV gesture techniques have been shown to communicate meaning to human observers and may be ideal in contexts that require lightweight systems such as unmanned aerial flight, however, this work may be limited to an idealized range of viewer perspectives. As gesture is a visual communication technique it is necessary to consider how the perception of a robot gesture may suffer from obfuscation or self-occlusion from some viewpoints. This thesis presents the results of three online user-studies that examine participants’ ability …
Direct Numerical Simulation Of Hypersonic Turbulent Boundary Layers: Effect Of Spatial Evolution And Reynolds Number,
2022
Missouri Unviersity of Science and Technology
Direct Numerical Simulation Of Hypersonic Turbulent Boundary Layers: Effect Of Spatial Evolution And Reynolds Number, Junji Huang, Lian Duan, Meelan M. Choudhari
Mechanical and Aerospace Engineering Faculty Research & Creative Works
Direct numerical simulations (DNS) are performed to investigate the spatial evolution of flat-plate zero-pressure-gradient turbulent boundary layers over long streamwise domains (Formula Presented, with Formula Presented the inflow boundary-layer thickness) at three different Mach numbers, Formula Presented, Formula Presented and Formula Presented, with the surface temperatures ranging from Quasi adiabatic to highly cooled conditions. The settlement of turbulence statistics into a fully developed equilibrium state of the turbulent boundary layer has been carefully monitored, either based on the satisfaction of the von Kármán integral equation or by comparing runs with different inflow turbulence generation techniques. The generated DNS database is …
Development Of A Bio-Inspired Artificial Butterfly Vehicle,
2022
University of Alabama in Huntsville
Development Of A Bio-Inspired Artificial Butterfly Vehicle, Thomas Payne Clark
Honors Capstone Projects and Theses
No abstract provided.
Computational Analysis Of The Effects Of Scarfed Nozzle Variations On Jet Plumes,
2022
Ohio Northern University
Computational Analysis Of The Effects Of Scarfed Nozzle Variations On Jet Plumes, Andrew J. La Sorsa
ONU Student Research Colloquium
A computational fluid dynamics analysis investigating the variation of effects on nozzles with non-orthogonal exit planes, known as scarfing, was performed. The steady Reynolds-averaged Navier-Stokes model, coupled with the Spalart-Allmaras turbulence model, was used to simulate and compare plume development and characteristics using various scarfing geometries at variable inlet conditions. The jet plume cross-section is significantly affected for overexpanded conditions, while retaining the nozzle exit shape for underexpanded conditions, although slight peaks (bifurcation) do occur at the centerline. The same observations occur when slightly changing the angle of scarf. However, inverting the overall geometry of the diverging portion of the …
Effects Of Vortex Generator Placement On A Horizontal Axis Wind Turbine Blade,
2022
Ohio Northern University
Effects Of Vortex Generator Placement On A Horizontal Axis Wind Turbine Blade, Dagan Sorensen
ONU Student Research Colloquium
Vortex generators are commonly used devices to control the flow over an airfoil or other surface. In this paper the effect of differing placements of vortex generators on a wind turbine airfoil, compared to an airfoil without vortex generators, were simulated using computational fluid dynamics(CFD). It was shown that, in some instances, the application of vortex generators effectively controlled the flow over the airfoil to increase the power produced by the wind turbine. According to the CFD results, the application of vortex generators at an angle increased the lift produced, as well as delaying the separation of the boundary layer.
Computational Comparison Of Dual Bell, Expansion-Deflection, And Aerospike Nozzles,
2022
Georgia Southern University
Computational Comparison Of Dual Bell, Expansion-Deflection, And Aerospike Nozzles, Manuel R. Abadie Ardon
Honors College Theses
In the search for a Single-Stage-to-Orbit rocket, Altitude Compensating Nozzles concepts (ACNs) have been proposed since the 1950s, but research has stalled despite the modern analysis tools available. These nozzle concepts offer optimum performance at two or more altitude settings. This research chose three of these concepts, these being the Dual Bell, Expansion-Deflection, and Aerospike, which were designed and analyzed at various pressure ratios (NPR=10,15,30,36,30,45) using Computational Fluid Dynamics (CFD) software FLUENT. Simulations generated pressure distributions along the nozzle wall, which allowed to calculate data values such as thrust coefficients. Nozzle efficiency is calculated from this data and used to …
A Review Of Avian-Inspired Morphing For Uav Flight Control,
2022
University of Michigan
A Review Of Avian-Inspired Morphing For Uav Flight Control, Christina Harvey, Lawren L. Gamble, Christian R. Bolander, Douglas F. Hunsaker, James J. Joo, Daniel J. Inman
Mechanical and Aerospace Engineering Faculty Publications
The impressive maneuverability demonstrated by birds has so far eluded comparably sized uncrewed aerial vehicles (UAVs). Modern studies have shown that birds’ ability to change the shape of their wings and tail in flight, known as morphing, allows birds to actively control their longitudinal and lateral flight characteristics. These advances in our understanding of avian flight paired with advances in UAV manufacturing capabilities and applications has, in part, led to a growing field of researchers studying and developing avian-inspired morphing aircraft. Because avian-inspired morphing bridges at least two distinct fields (biology and engineering), it becomes challenging to compare and contrast …
Design, Optimization, And Construction Of Flexure, Optical, Damping, And Leveling Systems For Electric Propulsion Thrust Stand,
2022
Western Michigan University
Design, Optimization, And Construction Of Flexure, Optical, Damping, And Leveling Systems For Electric Propulsion Thrust Stand, Logan Hefferan
Honors Theses
An Thrust Stand is a device that uses the basic principles of torsion and displacement to experimentally measure and calculate the thrust generated by an Electric Propulsion (EP) Thruster. Western Michigan University is host to three organizations that work with electric propulsion thrusters currently without a way of obtaining direct experimental thrust data. For this Senior Design Project, the flexure, optical sensing, damping and leveling systems for a thrust stand originally designed by Hannah Watts in her WMU Honors Thesis: Design of A Thrust Stand for Electric Propulsion [13] will be constructed. The four subsystems will be redesigned, optimized, and …
