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Articles 1 - 15 of 15
Full-Text Articles in Other Mechanical Engineering
Prediction Of Satellite Temperature During An Orbit Of A Cubesat, Michael Reynolds
Prediction Of Satellite Temperature During An Orbit Of A Cubesat, Michael Reynolds
Honors Theses
This thesis develops a thermal-simulation strategy for predicting CubeSat component temperatures, applied to Jag-Sat-1, a CubeSat developed at the University of South Alabama and deployed from the International Space Station in 2022. The orbit was reconstructed from two-line element (TLE) data using simplified general perturbations (SGP4) propagation, and spacecraft attitude was recovered from onboard gyroscope measurements. Sunlight, penumbra, and umbra intervals were computed geometrically, and the external radiative environment — direct solar, Earth infrared, and albedo heat fluxes — was modeled using orientation-dependent view factors. These time-varying fluxes drove a transient finite-element thermal simulation of the full satellite geometry in …
The Optimization Of A Robotic Welding Arm To Improve Efficiency, Margaret Close
The Optimization Of A Robotic Welding Arm To Improve Efficiency, Margaret Close
Honors Theses
The main objective of this report is to optimize a robotic welding arm to improve a locker manufacturing process. The robotic welding arm, a Miller PerformArc, used by Lockers Manufacturing has been producing spatter. Spatter significantly reduces the quality of the product and increases the product’s manufacturing time. The goal of this project was to find the best solution to reduce spatter without weakening the welds and ensuring that efficiency will increase. The first step in this project was to test multiple weld testing variables such as voltage, current, welding angle, robot speed, and arc and crater ratios. For each …
Mechanical Engineering Senior Design Capstone Modine Engineering: Collapsible Hvac Coil Expansion Table, Austin M. Hipskind
Mechanical Engineering Senior Design Capstone Modine Engineering: Collapsible Hvac Coil Expansion Table, Austin M. Hipskind
Honors Theses
For the Mechanical Engineering Senior Design class, teams of seniors were asked to find a sponsor company willing to provide a problem they were experiencing at a local plant. Using the skills gained throughout college, they were asked to go through a standardized problem-solving method to develop a solution for the sponsor company. I was teamed with Fernando Arellano and Henry Lindsey to work with Modine Engineering on creating a modular and collapsible table for use with large, custom-designed coils. This table would have to hold large, heavy coils during the expansion process. Modine requested a 3D design, the cost …
Design And Optimization Of Aquaculture Gear: Development Of A Cage-Integrated Reeling Mechanism For Oyster Farming, Felicity Bryant
Design And Optimization Of Aquaculture Gear: Development Of A Cage-Integrated Reeling Mechanism For Oyster Farming, Felicity Bryant
Honors Theses
This project encompasses the design, fabrication, and testing of a cage-integrated reeling system aimed at reducing the physical labor required in oyster aquaculture at Bama Bay Oyster Farm, the last operational oyster farm in Mobile Bay. The proposed system includes two primary components: lightweight, modular oyster cages and a dual-winch reeling device for automated retrieval. Three cage prototypes—rectangular, oval, and hexagonal—were evaluated for structural performance and fabrication feasibility. The oval design was ultimately excluded due to practical fabrication limitations. The rectangular and hexagonal designs were fabricated using recycled materials and tested under the most extreme environmental conditions derived from years …
Reconfigurable Python Autopilot Software For Rc Aircraft, Kate Doiron
Reconfigurable Python Autopilot Software For Rc Aircraft, Kate Doiron
Honors Theses
No abstract provided.
Effects Of The Gravity Gradient On The Path Of 1i/‘Oumuamua, Hannah R. Richardson
Effects Of The Gravity Gradient On The Path Of 1i/‘Oumuamua, Hannah R. Richardson
Honors Theses
In October 2017, the asteroid 1I/’Oumuamua first passed into viewing range [1]. The asteroid is notable for being the first interstellar object to enter the solar system. 1I/’Oumuamua was also unusual in its geometry; it is thought to have an aspect ratio of 6:1 and a length of approximately 400 m [2] [3]. The asteroid was observed to experience a non-Keplerian acceleration estimated to be on the order of 1⇥10−6 m s2 . Several theories have been proposed for the cause of this acceleration, all of which are non-gravitational in nature: volatile outgassing, photon pressure, and solar winds [1][4]. However, …
The Effects Of Uv Degradation On Polycarbonate Plastics Under Dynamic Compressive Loading, Hannah Bradford
The Effects Of Uv Degradation On Polycarbonate Plastics Under Dynamic Compressive Loading, Hannah Bradford
Honors Theses
The objective of this experiment was to analyze the dynamic properties of polycarbonate plastics subjected to accelerated ultraviolet (UV) exposure. This was done by subjecting rods of polycarbonate plastic to UV degradation in a QUV accelerated weathering machine for 375, 750, and 1500-hours. These rods were then tested under dynamic compression using a Split-Hopkinson Pressure Bar at an average strain rate of 1600/s. The Split-Hopkinson pressure bar works by rapidly compressing a sample between 3 axial rods sending an elastic wave through the sample. The strain gauges on the incident rod and the transmission rod transformed the elastic wave deformation …
A Molecular Dynamics Study Of The Laser Sintering Process And Subsequent Mechanical Properties Of Γ-Tial Nanoparticles, Eleanor Dickens
A Molecular Dynamics Study Of The Laser Sintering Process And Subsequent Mechanical Properties Of Γ-Tial Nanoparticles, Eleanor Dickens
Honors Theses
Using molecular dynamics (MD) simulations, the laser sintering additive manufacturing process is investigated through the observation of γ-TiAl nanoparticles. This process is conducted using both uni-directional chain and stacking configurations. By mimicking the heating process and varying laser sintering parameters such as heating rater, sintering temperature, and particle orientation, the fusion behavior and resulting products are analyzed for both chain and stacking NP patterns. In of single chain cases, it is noticed that slower heating rates and higher melting temperatures yield larger neck growth between each individual particle and thus produce a more stable product. This leads to stronger mechanical …
Analysis On Fuel Options For Scramjet Engines With The Study To Lower The Starting Mach Number, Sumantra Luitel, Gagan Dangi
Analysis On Fuel Options For Scramjet Engines With The Study To Lower The Starting Mach Number, Sumantra Luitel, Gagan Dangi
Honors Theses
The main objectives of this report were to perform analysis of an ideal scramjet engine, to assess the influence of fuel on endurance factor, and the possibility of lowering the starting Mach Number of the scramjet. In the first part, an ideal cycle parametric analysis was conducted on three different fuels i.e. Liquid Hydrogen (LH2), Jet Propellant 7 (JP-7), and Rocket Propellant (RP-1), taking into account their availability, physical properties, current uses, and potential uses. The detailed analysis is done largely relying on a 9 step Parametric Cycle Analysis technique to study how fuel properties influence the variation of seven …
Parametric Design Of Flywheel For An Electric Punch Press, Prashant Dhakal
Parametric Design Of Flywheel For An Electric Punch Press, Prashant Dhakal
Honors Theses
Almost all designs start with a design requirement. These may be weight, volume, clearance, and even custom calculations. Finding a solution that meets these requirements often involves tedious and time-consuming iterations. Once the solution has been found, the design must be optimized to find the best possible solution. Finding the ‘best possible design’ requires substantial time and effort dedicated to iterating and analyzing the potential model solutions. This is where Parametric design comes into play. The Parametric design aids in specifying the key parameters of the design and makes changes interactively, with the model updating automatically. The purpose of this …
Computational Study On Suppression Of Airfoil Flow Separation Using High-Frequency Translational Surface Actuation, Bibek Gupta
Computational Study On Suppression Of Airfoil Flow Separation Using High-Frequency Translational Surface Actuation, Bibek Gupta
Honors Theses
Flow separation is a phenomenon that occurs when pressure increases in the streamwise direction of a flow, making a distinctive boundary layer or separation bubble. It causes aircraft to experience an increase in drag and noise and a decrease in a lift, hence degrading their aviation performance. This study uses numerical simulations to understand better the effects of high-frequency translational surface actuation (HFTSA) on flow separation control. The numerical simulations mimic the experimental parameters of an experiment performed by Okoye et al. on using the HFTSA system to control flow separation. A symmetrical airfoil structure of chord length of 0.3 …
Mathematical Modeling Of A Variable Mass Rocket’S Dynamics Using The Differential Transform Method, Ashwyn Sam
Mathematical Modeling Of A Variable Mass Rocket’S Dynamics Using The Differential Transform Method, Ashwyn Sam
Honors Theses
In this paper, the mathematical modelling of a rocket with varying mass is investigated to construct a function that can describe the velocity and position of the rocket as a function of time. This research is geared more towards small scale rockets where the nonlinear drag term is of great interest to the underlying dynamics of the rocket. A simple force balance on the rocket using Newton’s second law of motion yields a Riccati differential equation for which the solution yields the velocity of the rocket at any given time. This solution can then be integrated with respect to time …
Boat-Lift Design And Analysis, Nathan Schick
Boat-Lift Design And Analysis, Nathan Schick
Honors Theses
A current in production 6000 lb. rated boat-lift is being sold at “Great Lake Lifts”. The lift was tested experimentally and proved to hold at least 8000 lb. The design team successfully modeled the current lift on Ansys to help the customer understand where the weakest points in the design were. Following the creation of the initial lift design, the design team proposed and tested modifications that could be made in order to make the lift more structurally sound. The initial lift had a maximum deflection of 0.43846 inches, a maximum stress of 15880 psi, and a safety factor of …
Attitude Determination Control Testing System (Helmholtz Cage And Air Bearing), Nicolas Theoret
Attitude Determination Control Testing System (Helmholtz Cage And Air Bearing), Nicolas Theoret
Honors Theses
The WALI team at Western Michigan University requested a test environment to validate their CubeSat’s de-tumbling control system and hardware. The test environment required a Helmholtz cage and spherical air bearing. The Helmholtz cage provides an adjustable magnetic field to simulate low earth orbit; the spherical air bearing simulates the friction free environment the CubeSat will experience in space. In conjunction, the two components create an adjustable system that simulates a satellite in low earth orbit.
Design Of A Tandem Rotor Hovering Vehicle, Brent Kostich
Design Of A Tandem Rotor Hovering Vehicle, Brent Kostich
Honors Theses
An investigation of thrust vectoring and an examination of existing tandem rotor dynamics were used to develop a structural body for a tandem rotor vehicle, derive the equations of motion of the system, and simulate a dynamic model of the vehicle. A vehicle prototype was constructed while further application of remote control capabilities, flight testing, and control development were researched. The dynamic simulation was based on a linear model of the system so as to open the possibility of implementing a control system. The simulation results show that thrust synchronization yields a predictable motion response. The prototype constructed did not …