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Articles 1561 - 1590 of 11097
Full-Text Articles in Aerospace Engineering
Materials Testing For Large Format 3d Printing, William Jenkins
Materials Testing For Large Format 3d Printing, William Jenkins
Williams Honors College, Honors Research Projects
An ABS Carbon Fiber blend was printed into single walled hexagons at a variety of settings on a Cincinnati BAAM large format 3D printer. These hexagons were then cut down into sheets and had tensile and flexural test samples cut out of them, in order for materials testing to be performed. Tensile strength, tensile strain, young’s modulus, flexural strength, deflection and elastic modulus were all determined. A desktop CNC machine and a planer were purchased for the manufacturing of these samples, and an efficient cutting procedure was designed and optimized. After all data collection concluded, this data was thoroughly analyzed, …
Space Force - Inspection, Romualdo Cipro
Space Force - Inspection, Romualdo Cipro
Williams Honors College, Honors Research Projects
Our project deals with a common problem that is encountered with satellites in earth orbit or beyond. It is very common in space for there to be small collisions between satellites and foreign space debris, and it takes a lot of time and money to send a person out to repair the damage caused by the collision. Our goal is to develop a way to perform these repairs autonomously. We plan to develop a way to scan a satellite or spacecraft hull for damage using a robot and then repair the damage while still maintaining the material specifications required for …
Short Strand Carbon Fiber Reinforced Polylactic Acid Filament For Additive Manufacturing, Dale Chenoweth, Lukas Seggi, Luke Phillips
Short Strand Carbon Fiber Reinforced Polylactic Acid Filament For Additive Manufacturing, Dale Chenoweth, Lukas Seggi, Luke Phillips
Williams Honors College, Honors Research Projects
In this design project, the additive manufacturing filament of short strand carbon fiber (SSCF) reinforced polylactic acid (PLA) composite was developed. The micro-size, precision cut SSCFs were mixed with the PLA pellets through a melting homogenization process. Through this process the composite material block is cut and divided into pieces for ease of pelletizing. The material block pieces are then pelletized to be fed through the single screw extruder to develop the SSCF-PLA composite filament. The SSCF-PLA filaments were manufactured with a varying amount of SSCF ranging from 0.5% to 10% of the material block's weight. Development of a 1% …
Inspection/Fault Detection Team, James Worrall
Inspection/Fault Detection Team, James Worrall
Williams Honors College, Honors Research Projects
Our project deals with a common problem that is encountered with satellites in earth orbit or beyond. It is very common in space for there to be small collisions between satellites and foreign space debris, and it takes a lot of time and money to send a person out to repair the damage caused by the collision. Our goal is to develop a way to perform these repairs autonomously. We plan to develop a way to scan a satellite or spacecraft hull for damage using a robot and then repair the damage while still maintaining the material specifications required for …
Space Force Spacecraft Hull Inspection: Creation Of A Process To Inspect, Compare, And Fault Detect On The Surface Of A Spacecraft Hull, Ethan Rainsburg
Space Force Spacecraft Hull Inspection: Creation Of A Process To Inspect, Compare, And Fault Detect On The Surface Of A Spacecraft Hull, Ethan Rainsburg
Williams Honors College, Honors Research Projects
The Space Force Inspection design project aims to create a system for scanning the hull of a spacecraft, identifying any damage by cross-checking the new scan with a previous scan, and fixing any identified damage picked up by the scan. This project contains key objectives such as defining testable parameters for any given scanner, creating a repeatable process for comparing scans, and automating the process using open-source code and software. The ideal outcome for this project is to have the fully automated system implemented to a robot that is being designed and manufactured by a sister team. Some of the …
Uav To Carry Heavy Loads, Jacob Cannon, Robert Connor Downs, Anthony Orlando
Uav To Carry Heavy Loads, Jacob Cannon, Robert Connor Downs, Anthony Orlando
Williams Honors College, Honors Research Projects
Our senior design project aims to develop an innovative Unmanned Aerial Vehicle (UAV) capable of carrying heavy payloads up to 50 lbs. This UAV will address the growing demand for efficient and autonomous cargo transportation, unlocking new possibilities in logistics and remote deliveries. The primary goal is to design, build, and test a robust UAV platform equipped with advanced propulsion systems, stabilizing mechanisms, and a secure payload attachment system. The heavy-lift UAV will be capable of transporting payloads in challenging environments, enhancing its versatility for various industries, including emergency response, disaster relief, and commercial logistics. For the extent of this …
Ambient Temperature Strength Degradation Of A Ceramic Matrix Composite Due To Solid Particle Erosion, Jonathan Clawson
Ambient Temperature Strength Degradation Of A Ceramic Matrix Composite Due To Solid Particle Erosion, Jonathan Clawson
Williams Honors College, Honors Research Projects
Solid particle erosion (SPE) is an issue for aircraft exposed to hard, fine particles, such as sand or dust, that can be ingested into the engine at a high velocity without reaching their melting point, resulting in material removal. SPE can be attributed to the intake of particulate debris from the runway or from airborne particulates. The cumulative mass loss from SPE damage affects the structural integrity and performance of the engine; however, its effects on ceramic matrix composites (CMCs), that are being employed in the aerospace industry, are not well understood in literature. The limited SPE research studies that …
Systems Engineering In Zips Aero Design, Benjamin Kemal Sabic, Mathieu Kumiega
Systems Engineering In Zips Aero Design, Benjamin Kemal Sabic, Mathieu Kumiega
Williams Honors College, Honors Research Projects
This research project has the goal of implementing systems engineering in the Zips Aero Design team at the University of Akron at a general member level. The use of systems engineering techniques will be employed to keep every member on track throughout the competition season. The deliverables of this project are the PDR, CDR, AIAA DBF Proposal, AIAA Technical Design Report, the Prototype Aircraft, and the Competition Aircraft.
Design Of An Experimental Solid Rocket Motor, Johnathan Bettes, Andrew Fuller
Design Of An Experimental Solid Rocket Motor, Johnathan Bettes, Andrew Fuller
Williams Honors College, Honors Research Projects
This project utilizes mechanical and chemical principles to characterize propellant grains and to manufacture a custom nozzle to create experimental Solid Rocket Motors (SRMs) with a propellant called Angry Listerine. For the propellant grains, one major non-chemical factor that determines its thrust performance is the grain geometry, or the core of the grains for which hot gases flow through the propellant and out of the nozzle to further react with exposed chemical surfaces. The two kinds of grain geometries analyzed and tested in this report are called MoonBurner, an offset circular core, and Finocyl, a gear-shaped core. The nozzle for …
Integrated Organizational Machine Learning For Aviation Flight Data, Michael J. Pritchard, Austin T. Walden, Paul J. Thomas
Integrated Organizational Machine Learning For Aviation Flight Data, Michael J. Pritchard, Austin T. Walden, Paul J. Thomas
Journal of Aviation/Aerospace Education & Research
Increased availability of data and computing power has allowed organizations to apply machine learning techniques to various fleet monitoring activities. Additionally, our ability to acquire aircraft data has increased due to the miniaturization of small form factor computing machines. Aircraft data collection processes contain many data features in the form of multivariate time series (continuous, discrete, categorical, etc.) which can be used to train machine learning models. Yet, three major challenges still face many flight organizations: 1) integration and automation of data collection frameworks, 2) data cleanup and preparation, and 3) developing an embedded machine learning framework. Data cleanup and …
Optimization Of High-Bypass Turbofan High-Pressure Compressor Blade – A Case Study, Adeel Khalid, Vlad Mandzyuk
Optimization Of High-Bypass Turbofan High-Pressure Compressor Blade – A Case Study, Adeel Khalid, Vlad Mandzyuk
The Kennesaw Journal of Undergraduate Research
This research determines the relationship between the High-Pressure Compressor (HPC) rotor blade design variables and compressor pressure ratio of a high bypass turbofan engine. Alterations in the HPC blades span, chord, taper, twist, number, and angle of incidence are performed and their effect on the HPC pressure ratio is observed. The objective is to determine key parameters that could maximize the performance of a high-pressure compressor for a given mission. Physics-based modeling, Computational Fluid Dynamics (CFD), and wind-tunnel testing are performed to compare and validate findings. Physics-based modeling is performed to serve as the benchmark for data obtained through other …
Winglet Vortex Optimization, Adeel Khalid, Anthony Gutierrez
Winglet Vortex Optimization, Adeel Khalid, Anthony Gutierrez
The Kennesaw Journal of Undergraduate Research
The objective of this research is to determine the effect on aerodynamic performance due to changes of winglet design variables of the Boeing 737-700 aircraft. The various winglet types studied in this research include the blended, canted, wingtip fence and split scimitar. The variables include height, sweep angle, taper ratio, and inclination angle. These variables are altered in 5% increments from -15% to +15% of their original baseline values. Each altered winglet design only changes one variable at a time while keeping all other variables constant. The altered models are compared to the original by finding the aerodynamic efficiency through …
Propulsion Heat Analysis Nuclear Trajectory Optimization (Phantom), Ana Clecia Alves Almeida, Jonathan Davis, Ryan Dippolito
Propulsion Heat Analysis Nuclear Trajectory Optimization (Phantom), Ana Clecia Alves Almeida, Jonathan Davis, Ryan Dippolito
Williams Honors College, Honors Research Projects
Interplanetary Travel requirements necessitate the use of increasingly complex propulsion systems. Nuclear Thermal Propulsion (NTP) is a cutting-edge concept that holds immense potential for the future of space exploration. By utilizing nuclear fission to heat a propellant and generate thrust, NTP offers the potential for unprecedented efficiency, enabling faster interplanetary travel and extended mission capabilities. A nuclear thermal rocket engine is a type of propulsion system that utilizes the heat generated by a nuclear reactor to heat and expel a propellant, typically hydrogen, at high velocities to produce thrust. The engine consists of three main subsystems: the nuclear reactor, the …
Efficient Connectivity Management And Path Planning For Iot And Uav Networks, Amirahmad Chapnevis
Efficient Connectivity Management And Path Planning For Iot And Uav Networks, Amirahmad Chapnevis
Theses and Dissertations
This dissertation explores how to better manage resources in mobile networks, especially for enhancing the performance of Unmanned Aerial Vehicles (UAV)-supported IoT networks. We explored ways to set up a flexible communication architecture that can handle large IoT deployments by making good use of mobile core network resources like bearers and data paths. We developed strategies that meet the needs of IoT networks and enhance network performance. We also developed and tested a system that combines traffic from several mobile devices that use the same user identity and network resources within the core mobile network. We used everyday smartphones, SIM …
Magnetic Separation Of Lunar Regolith Simulants With Applications To In Situ Resource Utilization On The Moon, Peter Bachle, Jeffrey Smith, Fateme Rezaei, David Bayless, William Schonberg, Daoru Han
Magnetic Separation Of Lunar Regolith Simulants With Applications To In Situ Resource Utilization On The Moon, Peter Bachle, Jeffrey Smith, Fateme Rezaei, David Bayless, William Schonberg, Daoru Han
Chemical and Biochemical Engineering Faculty Research & Creative Works
The development of in situ resource utilization (ISRU) for metal extraction is imperative as a steppingstone for habitation construction in lunar and non-terrestrial environments. Separation of minerals by chemical composition is important to optimize metal and oxygen liberation from lunar ore. To this effect, devices capable of separating aluminum bearing minerals from iron-bearing minerals from the lunar regolith simulants have been developed. Twenty-eight different simulants have been used in this study. A dual-belt separator was designed to reduce middling. Para-magnetic minerals were reliably separated using a neodymium N52-magnet-separator system. Effective separation of aluminum-bearing minerals from iron-bearing minerals was greater than …
Electronics Design For Krepe Atmospheric Entry Capsule Avionics, Matt Ruffner
Electronics Design For Krepe Atmospheric Entry Capsule Avionics, Matt Ruffner
Theses and Dissertations--Electrical and Computer Engineering
This research documents the design, testing, and implementation of sensing, control, and communications subsystems for small atmospheric entry capsules. Atmospheric entry capsules pose a unique electronics design challenge given mission requirements, environmental constraints, and inherent risk involved in space based missions. Previous work on small satellites developed the CubeSat platform as a means of ensuring reliability after university-led small satellite missions experienced failures. The publication of the CubeSat platform allowed researchers to focus on the payload science utilizing a standardized form-factor and reusable electronics. Environmental and operational constraints of CubeSats and atmospheric entry capsules overlap and best-practices associated with building …
Implementation Of Cavity Vortex Generators To Mitigate Stall And Ice Accretion On The Naca 0012, Eric Pernell
Implementation Of Cavity Vortex Generators To Mitigate Stall And Ice Accretion On The Naca 0012, Eric Pernell
College of Graduate Studies: Theses & Dissertations
With the growing environmental concerns of international aviation carbon emissions are driven by the ever-increasing commercial aviation traffic. This study aims to increase the aerodynamic efficiency of the NACA 0012, by implementing cavity vortex generators with the intent to increase the effective stall angle without a substantial increase of drag. This study is performed with Reynolds Averaged Navier-Stokes (RANS) at a low Reynolds of 5.0E+04 with varying cavity depths along the leading edge. The depths study is placed at 10 percent cord at depths of 3, 5, and 10 percent cord. All cavity vortex generators effectively increased the stall angle …
Investigations Of Performance And Emissions Of A Fischer-Tropsch Gtl Sustainable Aerospace Fuel With Lubricity Improver In A Compression Ignition Engine With Butanol Port Fuel Injection, James B. Willis
College of Graduate Studies: Theses & Dissertations
As there is increasing concern over emissions of traditional fossil fuels, as well as the future of continued reliance on this dwindling resource, it is becoming increasingly evident that alternative fuels are a necessity. This research investigates the use of a Fischer-Tropsch fuel from natural gas feedstocks, S8, in an internal combustion research engine with a common rail fuel injection system. This synthetic kerosene fuel has a high DCN of 62, indicating high affinity to autoignition compared to conventional pump diesel (ULSD) at 48 DCN. However, due to the process by which it is produced, this fuel lacks the necessary …
Computational Analysis Of A Naca 0012 Straight Wing At Various Reynolds Numbers Approaching Stall, John E. Crowe Iii
Computational Analysis Of A Naca 0012 Straight Wing At Various Reynolds Numbers Approaching Stall, John E. Crowe Iii
College of Graduate Studies: Theses & Dissertations
As the capabilities and power of computational resources improve with each passing year, the implementation of simulation in the field of aerospace engineering also increases due to its increased efficiency, as it allows for reducing both time and resources. In this study, a computational method is created and tested for determining and visualizing the effect of increasing flow velocity on a NACA 0012 3D wing as it approaches and reaches stall. For this study, the flow over a NACA 0012 3D wing is simulated using a Reynolds-averaged Navier Stokes simulation at angles of attack of 6, 8, 10, 12, and …
Experimentatal And Numerical Investigation Of Turbojet Engine Performance, Emissions, And Noise/Vibrations Using Jet-A And F24 Fuel, John W. Mcafee Jr
Experimentatal And Numerical Investigation Of Turbojet Engine Performance, Emissions, And Noise/Vibrations Using Jet-A And F24 Fuel, John W. Mcafee Jr
College of Graduate Studies: Theses & Dissertations
Drastic improvement in cost effectiveness of high-power computing resources has generated a great interest numerical simulation to reduce the overhead cost of engine manufacturing, maintenance, and environmental concerns of engine testing. To accomplish this goal, this research presents the differences between military F24 fuel and commercial aviation fuel Jet-A from a thermochemical and engine performance perspective. This experimental data was used to create and validate a numerical model of the engine used in the experiments fueled with both Jet-A and F24 fuels. The experimental data was collected using a research based single stage turbojet engine outfitted with many sensors for …
Aeroelastic Phenomena Of Fixed-Wing Aircraft In Transonic And Supersonic Flows Using A Tightly-Coupled Computational Approach, John C. Havenar
Aeroelastic Phenomena Of Fixed-Wing Aircraft In Transonic And Supersonic Flows Using A Tightly-Coupled Computational Approach, John C. Havenar
College of Graduate Studies: Theses & Dissertations
Aeroelastic phenomena encountered during flight have considerable effects on the aerodynamic characteristics of fixed-wing aircraft. Transonic aeroelastic phenomena are often characterized by unique flow features which have complex ramifications for aircraft in transonic flight. Computational study of high-speed aeroelastic phenomena requires a fully-coupled aeroelastic algorithm. A series of wing designs are studied with a computational finite volume method solver accompanied by a finite element method solver for the calculation of structural deformation. The computational model for the flow field is validated with experimental data. Modeled flight conditions include transonic flows with bordering subsonic and supersonic cases included for completeness. The …
Latent Space Dynamics Learning For Stiff Collisional-Radiative Models, Xuping Xie, Qi Tang, Xianzhu Tang
Latent Space Dynamics Learning For Stiff Collisional-Radiative Models, Xuping Xie, Qi Tang, Xianzhu Tang
Mathematics & Statistics Faculty Publications
In this work, we propose a data-driven method to discover the latent space and learn the corresponding latent dynamics for a collisional-radiative (CR) model in radiative plasma simulations. The CR model, consisting of high-dimensional stiff ordinary differential equations, must be solved at each grid point in the configuration space, leading to significant computational costs in plasma simulations. Our method employs a physics-assisted autoencoder to extract a low-dimensional latent representation of the original CR system. A flow map neural network is then used to learn the latent dynamics. Once trained, the reduced surrogate model predicts the entire latent dynamics given only …
Target Size Estimation Through Sensor Fusion, Morgan Davidson, Cory Brinck, Kori Moore, Tanner Chase
Target Size Estimation Through Sensor Fusion, Morgan Davidson, Cory Brinck, Kori Moore, Tanner Chase
Space Dynamics Laboratory Publications
Target size is an important quantity in both classification and multi-sensor target tracking applications, but it is often an unknown. In some imaging applications, target size is assumed based on classification results. This assumed size is sometimes used in the synthesis of range measurements from monocular imagery, based on the apparent target size that is observed. Range-from-apparent-size measurements may be the only range measurements available during times when sensors that produce range information (such as radar) are not available. This range-from-apparent-size approach is typically plagued by range bias in the resulting measurements due to several factors. In this work, we …
Orbit Determination Demonstration Using Onboard One-Way Radiometrics From The Iris Radio On The Capstone Mission, Todd A. Ely, Anthony Zara, Dana Sorensen, Zaid J. Towfic, Connor Ott, Alec Forsman, John D. Baker
Orbit Determination Demonstration Using Onboard One-Way Radiometrics From The Iris Radio On The Capstone Mission, Todd A. Ely, Anthony Zara, Dana Sorensen, Zaid J. Towfic, Connor Ott, Alec Forsman, John D. Baker
Space Dynamics Laboratory Publications
Onboard one-way radiometric tracking from an Iris Radio paired with a Chip Scale Atomic Clock (CSAC) on NASA’s CAPSTONE mission has been collected and demonstrated to be able to determine its near rectilinear halo orbit. This is a first-ever demonstration of one-way radiometric tracking originating from the DSN and being collected onboard a spacecraft. For CAPSTONE, the tracking data from the Iris/CSAC pair are shown to have sufficient accuracy to enable future autonomous radio navigation for missions with modest navigation requirements. This work will compare the space-based data with prior ground-based test results, as well as assess CAPSTONE’s orbit solution …
Ai-Based Defect Detection In Aerospace Ultrasonic Signals, Rami Issac Lake
Ai-Based Defect Detection In Aerospace Ultrasonic Signals, Rami Issac Lake
Graduate Research Theses & Dissertations
Ensuring the safety and integrity of materials and structures throughout the manufacturing cycle is a critical concern across various industries, including aerospace, automotive, oiland gas, and civil engineering. Non-Destructive Inspection (NDI) techniques allow for the examination of materials without causing damage or alteration, enabling the early detection of potential issues before materials are utilized in the field. The inspection of fuselage composites presents a particular challenge due to their complex structures, diverse materials, and differences in thickness, making defect detection a challenging yet crucial task. Moreover, defects of various types and causes can emerge across all depths of the material …
Fundamentals Of Sustainability, Eva Maleviti
Fundamentals Of Sustainability, Eva Maleviti
Publications
Fundamentals of Sustainable Aviation is the frst textbook to survey the critical feld of sustainability within the aviation industry. Taking a systems thinking approach, it presents the foundational principles of sustainability and methodically applies them to diferent aviation sectors. Opening with the basics of sustainability, emphasising the Sustainable Development Goals, the book then considers the environmental, economic and social dimensions of aviation. The following chapters apply these insights to aviation design, supply chains, operations, maintenance and facilities. The fnal chapter examines the concept of resilience in sustainable aviation. Overall, the textbook shows how future sustainability can be achieved by making …
Experimental Characterization And Quantification Of Deformation Behavior In A Porous Carbon Fiber Network, Robert N Quammen
Experimental Characterization And Quantification Of Deformation Behavior In A Porous Carbon Fiber Network, Robert N Quammen
Theses and Dissertations--Chemical and Materials Engineering
Due to their wide range of attractive functional properties (such as low thermal conductivity and low density) porous materials are utilized in a variety of applications. In order to characterize these properties and others, the intrinsically heterogeneous microstructures of these materials need to be taken into account. These microstructures result in interactions across multiple length scales spanning several orders of magnitude. This makes the creation of robust computational models and straight-forward predictions of mechanical properties difficult for porous materials. With this in mind, this dissertation aims to provide experimental mechanical and deformation information spanning the length scales of interest for …
Gravity Fed Hopper Flow Of Bulk Solids For Lunar Isru, Jason Bendixen Noe
Gravity Fed Hopper Flow Of Bulk Solids For Lunar Isru, Jason Bendixen Noe
Dissertations, Master's Theses and Master's Reports
With the return to the moon in the decade of the 2020s, there has been a renaissance of lunar technology development and innovation. This has been particularly true for the area of lunar ISRU (In-Situ Resource Utilization). One key area in ISRU that has been neglected is lunar regolith storage hopper research. Many lunar regolith ISRU researchers use storage hoppers in their work but do not document the properties when designing the hoppers or do not have the information at hand. Because of this, hopper design and documentation are poorly understood, and more research is needed. Hoppers are vital for …
Initial Solution Improvements To A Tethered Robotic Path Planner Using Random Geometric Graph Configurations And Biased Sampling, Austen J. Goddu
Initial Solution Improvements To A Tethered Robotic Path Planner Using Random Geometric Graph Configurations And Biased Sampling, Austen J. Goddu
Dissertations, Master's Theses and Master's Reports
With NASA's ongoing efforts to establish a presence on the lunar surface to eventually move on to exploring mars, the development of intelligent robotic systems is more important than ever. The ability of robotics to explore hazardous and extreme terrain, coupled with long communication times from earth places an ever increasing need on more robust and efficient autonomy. Tethered robotics offer unique advantages to explore scientific targets both on the lunar and martian surfaces, capable of using their tether as a physical or metaphorical lifeline to allow the exploration of slopes, extreme dark regions, or areas in which wireless communication …
Comprehensive Review And Development Of A High-Pressure Hydraulic Impedance Tube For Vibroacoustic Attenuator Characterization, Matthew D. Beals
Comprehensive Review And Development Of A High-Pressure Hydraulic Impedance Tube For Vibroacoustic Attenuator Characterization, Matthew D. Beals
Dissertations, Master's Theses and Master's Reports
This research establishes a versatile test bench for characterizing hydraulic vibroacoustic attenuators. The primary evaluation metric is the transfer matrix, determined experimentally, with an emphasis on key properties such as transmission loss. To ensure accuracy and broad applicability, the methodology is based on industry-standard techniques for determining the transfer matrix. A comprehensive literature review consolidates existing approaches for hydraulic attenuator characterization. The test bench features a hydraulic impedance tube equipped with eight dynamic pressure transducer (DPT) taps strategically positioned before and after the sample interface. This setup accommodates arbitrary samples terminated with standard hydraulic fittings. Using ASTM E2611, the transfer …