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Articles 331 - 360 of 865
Full-Text Articles in Mechanical Engineering
3-D Positioning System For Trackable Adjustments Of Papillary Muscles, Ryan Michael Winters, Micaela Andrea Bataclan, Christine Do, Giselle Morales
3-D Positioning System For Trackable Adjustments Of Papillary Muscles, Ryan Michael Winters, Micaela Andrea Bataclan, Christine Do, Giselle Morales
Biomedical Engineering
Redacted.
Feasibility Study Of Radio Frequency Microelectromechanical Filters For Space Operation, Karanvir Singh
Feasibility Study Of Radio Frequency Microelectromechanical Filters For Space Operation, Karanvir Singh
Theses and Dissertations
Piezoelectric contour mode resonator technology has the unique advantage of combining low motional resistance with the ability to define multiple frequencies on the same substrate. Contour mode resonators can be mechanically coupled together to form robust band-pass filters for the next generation of GPS satellites with extreme size reduction compared to electrically coupled filters. Piezoelectric zinc oxide (ZnO) contour mode resonators have the potential for monolithic integration with current ZnO transistor further reducing size, power consumption, and cost of filter modules. Barium strontium titanate (BST) contour mode resonators have incredible frequency tunability due to the fundamental nature of the thin …
Consumer-Ready Insulated Solar Electric Cooker, Simon Ford, Sachin Gokhale, Brendan Lynn, Richard Nguyen
Consumer-Ready Insulated Solar Electric Cooker, Simon Ford, Sachin Gokhale, Brendan Lynn, Richard Nguyen
Mechanical Engineering
An insulated solar electric cooker, or ISEC, converts solar energy into electricity to cook food, boil water, provide heat or even help charge batteries. In this project, the focus is an ISEC with a phase change material (PCM) that helps store heat when the solar energy input is minimal, such as after the sun has set. Although a successful ISEC already exists that utilizes PCM, this product can be improved in many ways. The specific revisions investigated in this report are the improvement of the thermal efficiency with the implementation of a vacuum-sealed outer pot, the reduction of the overall …
Magnetic Gradient-Based Magnetic Tweezer System For 3d And Swarm Control Of Microswimmer, Xiao Zhang
Magnetic Gradient-Based Magnetic Tweezer System For 3d And Swarm Control Of Microswimmer, Xiao Zhang
Mechanical Engineering Research Theses and Dissertations
Microscale manipulation has very promising potential in medical applications such as drug delivery, minimal and invasion surgery. Contactless control is preferable as remote manipulation is necessary for in vivo applications. Among different control methods, magnetic power source is more suitable and robust for the applications mentioned above. Presented here is a magnetic tweezer system, which manipulates microscale magnetic particles using magnetic forces created by magnetic field gradient. The proposed system has three advantages: First, force applied by the magnetic tweezer system does not contact with the target object and can be generated in different directions. Second, the magnetic tweezer system …
Automated Bottling Station - Packaging System, Lauren Nicole Zinzilieta
Automated Bottling Station - Packaging System, Lauren Nicole Zinzilieta
Honors College Theses
This report focuses on the packaging system used at the end of the FESTO bottling station that is located in EP 2355. The system will be made up of an x-y 300 mm x 300 mm gantry system, an Arduino, two micro-stepping stepper drivers, and two 152.4 mm (6 in) single acting cylinders with a 3D printed bracket attached to both. The gantry system will be located at the end of the conveyor belt and will be programmed to pick up three bottles at a time and then will move a specified number of steps in both the x and …
Designing Cryogenic Strain Device For 2d Materials, Jake Carter
Designing Cryogenic Strain Device For 2d Materials, Jake Carter
Mechanical Engineering Undergraduate Honors Theses
The Churchill lab working within the Physics Department at the University of Arkansas is working to create important quantum states including weak topological insulators (TIs) through the use of symmetry engineering and topological electronic states in two-dimensional (2D) crystals of WHM materials. Experimental results of these topological states have been obstructed due to the difficulty to perform controlled in situ strain. This project strives to create a mount to utilize a piezoelectric nanopositioner within cryostats achieving an in situ strain that creates the quantum states the lab is looking to observe. This report also examines the necessary equations to determine …
Improving The Performance Of An Ead Aircraft By Use Of A Retractable Electrode System, Michael Alexander Fredricks
Improving The Performance Of An Ead Aircraft By Use Of A Retractable Electrode System, Michael Alexander Fredricks
Mechanical Engineering Undergraduate Honors Theses
Electroaerodynamic (EAD) propulsion is a growing area of research for small, low powered aircraft. Recent tests of EAD aircraft have demonstrated low performance in unpowered, gliding flight. The purpose of this paper is to investigate the effect of a retractable electrode system on the flight performance of an EAD aircraft. An analysis of electrode drag contribution on the MIT ionic wind plane’s performance predicts a maximum lift to drag ratio of 22, with the addition of a retractable electrode system, for a similarly sized and modeled EAD aircraft. An experiment is developed using a prototype aircraft, launcher, and retraction system …
Nanoscratch Study Of Diamond-Like Carbon Coatings With A Polydopamine + Sio2 Adhesive Underlayer, Anna Fisher
Nanoscratch Study Of Diamond-Like Carbon Coatings With A Polydopamine + Sio2 Adhesive Underlayer, Anna Fisher
Mechanical Engineering Undergraduate Honors Theses
Diamond-like carbon (DLC) coatings have a wide array of desirable characteristics such as low friction, high hardness, and scratch resistance. Due to high residual stress and thermal mismatch, DLC films experience adhesion difficulties when bonded with metallic substrates, leading to cracking and delamination. In this study, the properties of a new coating with a polydopamine underlayer and silica nanoparticles bonded to a stainless-steel substrate (PDA+SiO2/DLC) were studied alongside three other samples, one with a polydopamine underlayer (PDA/DLC), one with a trimethylsilane (TMS) underlayer (TMS/DLC), and one with no underlayer (DLC only). Nanoscratch tests were performed with a 1 μm spheroconical …
Design And Control Of A Peristaltic Pump To Simulate Left Atrial Pressure In A Conductive Silicone Model, Jeremy Collins
Design And Control Of A Peristaltic Pump To Simulate Left Atrial Pressure In A Conductive Silicone Model, Jeremy Collins
Mechanical Engineering Undergraduate Honors Theses
According to the CDC, atrial fibrillation is responsible for more than 454,000 hospitalizations and approximately 158,000 deaths per year. A common treatment for atrial fibrillation is catheter ablation, a process in which a long flexible tube is guided through the femoral artery and to the source of arrhythmia in the heart, where it measures the electrical potential at various locations and converts problematic heart tissue to scar tissue via ablation. This paper details the design and control of a low-cost ($400) peristaltic pump system using repetitive control to replicate blood pressure in the left atrium in a conductive silicone model …
Husky Hand: A Low-Cost Electro-Mechanical Prosthetic Arm For The Underprivileged, Adam Robert
Husky Hand: A Low-Cost Electro-Mechanical Prosthetic Arm For The Underprivileged, Adam Robert
Thinking Matters Symposium
A continuation of a low-cost prosthetic upper limb prototype design which was investigated in EGN 301. The prosthetic is specifically designed for the needs and requirements of under privileged individuals in the Dominican Republic with upper limb amputations. The project focuses on the creation of an open-source computer aided prosthetic hand/arm model. The design allows consumer-grade fused filament fabrication (FFF) 3-D printers to be used. The improved design allows for the integration of the PQ-12 linear actuator for grasp and finger control. This simplifies the assembly, while, also reducing the size and mass of the whole unit. Producing a low-cost …
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 …
Kennesaw State University And United Alloy Corporation Robotic Pick And Place Project, Kathryn Bharadwaj, Logan Spencer, Tharkun Hudlow
Kennesaw State University And United Alloy Corporation Robotic Pick And Place Project, Kathryn Bharadwaj, Logan Spencer, Tharkun Hudlow
Senior Design Project For Engineers
United Alloy Corporation (UAC), a company specializing in unique aluminum parts for aeronautics, needed a fix to their error prone, labor-intensive billet press operation. The process has a problem of adding the wrong size or wrong alloy billet to the induction oven, which results in a waste of raw materials. The billets range from ten to thirty-seven inches in length and weigh up to three hundred pounds. Currently, an operator uses a gantry crane to check and lift the billets from a rack onto the magazine of an induction oven. The magazine can hold up to three billets safely and …
Temperature-Immune Self-Referencing Fabry–Pérot Cavity Sensors, Hengky Chandrahalim, Jonathan W. Smith
Temperature-Immune Self-Referencing Fabry–Pérot Cavity Sensors, Hengky Chandrahalim, Jonathan W. Smith
AFIT Patents
A passive microscopic Fabry-Pérot Interferometer (FPI) sensor an optical fiber a three-dimensional microscopic optical structure formed on a cleaved tip of an optical fighter that reflects a light signal back through the optical fiber. The reflected light is altered by refractive index changes in the three-dimensional structure that is subject to at least one of: (i) thermal radiation; and (ii) volatile organic compounds.
Project G.H.O.S.T., Matthew Morell, Austin Conrad, Zackeris Gordon, Conan Estes
Project G.H.O.S.T., Matthew Morell, Austin Conrad, Zackeris Gordon, Conan Estes
Mechanical Engineering
Project G.H.O.S.T aimed to produce a model transmission with a control system for high performance/racing electric vehicles to utilize the full capability of the electric motor at higher speed applications. Current electric vehicles have a large amount of torque and use a fixed gear ratio that compromises between both high and low speeds with performance peaking around 65 miles per hour. A typical electric motor used in this application has approximately 1800 ft-lbs of torque up to 5,000 rpm. Past approximately 5,000 rpm, the torque rapidly drops off and so does the overall vehicle performance. Though transmissions exist that could …
Smud Solar Regatta, Logan Garby, Nam Le, Jacob Singer, Alejandro Carrera, Laura Casas
Smud Solar Regatta, Logan Garby, Nam Le, Jacob Singer, Alejandro Carrera, Laura Casas
Mechanical Engineering
The Sacramento Municipal Utility District (SMUD) hosts the Solar Regatta every year in Rancho Seco, CA, a competition which consists of teams building a solar powered boat to compete in three races: the sprint race, endurance race, and slalom race. The Cal Poly Solar Regatta team was informed mid-project by SMUD that the competition has been canceled once again for spring 2021, but the team decided to move forward with the construction of the boat. The previous Cal Poly team from 2019/2020 designed the hull and propulsion system of the boat. The 2020/2021 team worked with the previous team in …
Robust Scandium Aluminum Nitride Mems Resonators For L Band Operation In Orbital Environments, Israel W. Dunk
Robust Scandium Aluminum Nitride Mems Resonators For L Band Operation In Orbital Environments, Israel W. Dunk
Theses and Dissertations
This thesis investigates AlN alloyed with scandium in a variety of resonator architectures including WEM, overtone WEM, LEM, and SAW that have the potential to achieve high levels of electrical performance and environmental robustness. SAW resonators operating near 370 MHz are fabricated on polycrystalline Sc.37Al.63N, and AlN with the resulting devices compared and conclusions drawn as to the merits of each material. The design and fabrication of SAW devices is discussed in detail, with the operating characteristics of these resonators then tested both electrically and mechanically. Mechanical characterisation includes analysis of vibration and shock effects on …
A Feedback-Based Pneumatic Compression System For Effective Lymphedema Management, Mohammad Imrul Kayes
A Feedback-Based Pneumatic Compression System For Effective Lymphedema Management, Mohammad Imrul Kayes
LSU Master's Theses
Bioimpedance analysis (BIA) is a method of detecting lymphedema- a debilitating medical condition involving swelling of the extremities. Pneumatic compression devices are frequently used in the compression treatment of lymphedema. Although existing compression technology provides relief of symptoms, it has limitations in terms of ease-of-use, portability, and monitoring of treatment progress. Currently, there are no BIA analyzers in the market that run on a low-power microcontroller and a rechargeable battery. Moreover, no such device currently exists that integrate the BIA analysis with pneumatic compression system to offer a feedback-based solution for lymphedema treatment. This work represents the first steps towards …
Pulse Decay Thermal Conductivity Device, Matthew Schrenk
Pulse Decay Thermal Conductivity Device, Matthew Schrenk
All Undergraduate Projects
Currently, there are several ways in which thermal conductivity can be calculated or assessed on a given material. However, with each method of testing comes potential limitations such as size, material state, complexity, and time. The goal of this study was to develop a pulse heated thermistor that would reduce all four limitations, thus provide precise and timely results regardless of the material state and size. A thermistor is resistor which changes resistance in accordance to temperature. To achieve the design, heat transfer and electrical methods were applied. As with all resistors, heat is dissipated across the element and released …
Mini Rc Baja Car, Jason Schindler
Mini Rc Baja Car, Jason Schindler
All Undergraduate Projects
Incorporating each aspect of engineering incorporated into a senior project is difficult. That is why an RC Baja car is a great senior project for Mechanical Engineering students. The approach that students must take to design, construct, and test the car is to set parameters, and to make overall goals that can be easily measured. These goals include, but not limited to things like a $700 budget and the ability to withstand a 1-foot drop to a flat surface on all four wheels simultaneously. First, the design must meet the specifications and rules that are set previously. This ensures that …
Agv Design, Vincent Orzel, Zachary Woodrum
Agv Design, Vincent Orzel, Zachary Woodrum
Williams Honors College, Honors Research Projects
This report details the design and calculation work done towards creating an autonomous guided vehicle (AGV) for use in the steel and metal related industries. Steel Equipment Specialists (SES) is a major manufacturer of coil transportation vehicles for these industries. SES believes the future of coil transportation within the mills includes AGVs in some circumstances. The team was tasked with exploring the design and cost of a base model for use in future designs, since SES has not yet modeled or manufactured an AGV. This design was successful under the stress from the application in calculations, and the cost of …
Design Of Compact Signal Distribution Device For Hoffman Reflex Methodologic Applications In Sports Medicine, Abayomi E. Folaranmi
Design Of Compact Signal Distribution Device For Hoffman Reflex Methodologic Applications In Sports Medicine, Abayomi E. Folaranmi
College of Graduate Studies: Theses & Dissertations
A study is presented on the design of compact sized signal distribution device for Hoffman reflex methodological applications in sports medicine. Established conventional method for measuring and recording human or animal nervous system response to external electrical stimulus was considered in this study. Challenges with measuring and recording techniques which introduces inaccuracies and unreliability of reflex response data obtained was analyzed, this work is aimed at improving the reliability of H-reflex d measuring and recording technique for the purpose of reducing inaccuracies introduced to data obtained because of conventional methodologic approach. Inaccuracies due to changes in subject muscle geometry and …
Tensile Environment Chamber, Cameron Ngai, Trent Hamilton, Mitchell Carroll, Jack Molitor
Tensile Environment Chamber, Cameron Ngai, Trent Hamilton, Mitchell Carroll, Jack Molitor
Mechanical Engineering
This project created the heating system, cooling system, and control system for an environmental chamber for a tensile test machine in the Cal Poly Composites Lab. This chamber allows for students to test material properties under a variety of thermal conditions. This project was done in collaboration with a team working on the structural aspect of the chamber. While consumer environmental chambers are on the market, they often cost more than $50,000. Additionally, our chamber conforms to further size and weight constraints. Because of this constraint, many conventional techniques and components used for these chambers are not feasible for our …
Smart Home Pet Feeder, Andrew Markja, Simona Zdravev, Timothy Zubek, Christian Jackson
Smart Home Pet Feeder, Andrew Markja, Simona Zdravev, Timothy Zubek, Christian Jackson
Williams Honors College, Honors Research Projects
The goal of this project was to design a Smart Home Pet Feeder that will allow the owner to feed their pet using 4 different methods. The methods are: manually, scheduled, app/url, Alexa/Google. The advantages of this design are that it will become convenient for pet owners who are busy and unable to make it back to their house to feed their pets remotely or for those who enjoy the use of technology from within their home for no-trouble feeding.
Rust Preventative Spray Varnish Verification And Nozzle Development, Dakota Snyder, Collin Whitely, Stephen Patrick, William Mccullough
Rust Preventative Spray Varnish Verification And Nozzle Development, Dakota Snyder, Collin Whitely, Stephen Patrick, William Mccullough
Williams Honors College, Honors Research Projects
This document details the research and selection of five rust preventative spray varnishes that were to be tested. These varnishes are known as the five materials. The materials underwent rust testing and in-depth analysis to see which protects against rust the best. In addition, the document reports on the construction of a prototype self-contained, automated spray varnishing unit.
Mini Baja Cvt Optimization, Emily Masa, Alec Bagley, Kyle Fertig, David Gao, Noah Cook
Mini Baja Cvt Optimization, Emily Masa, Alec Bagley, Kyle Fertig, David Gao, Noah Cook
Williams Honors College, Honors Research Projects
The goal of this project is to design and optimize an eCVT setup for The University of Akron’s Zips Baja SAE car. The current CVT is a centrifugal CVT which changes its gear ratio through a series of weights and springs, while an eCVT uses a motor to change the gear ratio.The advantage of an eCVT is that the motor can be programmed to adjust in real-time based on the engine rpm. A centrifugal CVT can only be tuned ahead of time. It is necessary to compare the new acceleration performance to a tuned centrifugal CVT to determine if it …
Dielectrophoretic Control Of Macroscopic Media For In-Space Applications, Savannah Flaherty
Dielectrophoretic Control Of Macroscopic Media For In-Space Applications, Savannah Flaherty
Summer Community of Scholars Posters (RCEU and HCR Combined Programs)
No abstract provided.
Theoretical Design Of A 360 Degree Pendulum Ride, John William Elliott
Theoretical Design Of A 360 Degree Pendulum Ride, John William Elliott
Williams Honors College, Honors Research Projects
This project uses several areas of study: mechanical physics/design of moving parts, electrical power, and human comfort. It is based on the pendulum ride at Cedar Point called "maXair." One of the goals with this project is to create a theoretical, simpler version of a 360 Degree Pendulum Ride that operates on the same principles of a conventional pendulum rides. The velocity, forces on the shaft in the middle of the ride, the accelerations, the g force on the riders, and all the other forces associated with the pendulum ride were analyzed as well.
Hydraulic Vehicle Challenge, Jacob Steiner, David Kotovets, Evan Blitz, Luke Fetherston, Alex Colucy
Hydraulic Vehicle Challenge, Jacob Steiner, David Kotovets, Evan Blitz, Luke Fetherston, Alex Colucy
Williams Honors College, Honors Research Projects
The target goal of this project is for a team of students to design a vehicle which is based on human power as the primary mover of the system and achieves vehicle propulsion through the required use of hydraulics and pneumatics. In summary, the rider will power a pump that will generate pressure in order to move the fluid that drives the motor. This will result in the powered rotation of the wheels. As there are many possible designs, naturally, this means that the final design for the vehicle will have specific limitations such as weight and the required use …
Implementation Of An Autonomous Guided Vehicle (Agv), Allen St. Myers, Alan Miller
Implementation Of An Autonomous Guided Vehicle (Agv), Allen St. Myers, Alan Miller
Williams Honors College, Honors Research Projects
This report thoroughly represents a proposal to AAM Metal Forming Minerva for the implementation of an AGV (Autonomous Guided Vehicle) Unit. Our recommendations are made with consideration to existing manufacturing processes and demonstrate how using an AGV would be a net positive investment for the company. By first examining the current operating costs, a three-tiered proposal is tailored based on increasing investment cost. Each tier increase encompasses the previous tiers’ proposed improvements while also growing in complexity and investment cost. The results of our research indicate that our Tier 2 proposal will provide the most benefit to our facility now …
Nebulizer-Based Systems To Improve Pharmaceutical Aerosol Delivery To The Lungs, Benjamin M. Spence
Nebulizer-Based Systems To Improve Pharmaceutical Aerosol Delivery To The Lungs, Benjamin M. Spence
Theses and Dissertations
Combining vibrating mesh nebulizers with additional new technologies leads to substantial improvements in pharmaceutical aerosol delivery to the lungs across therapeutic administration methods. In this dissertation, streamlined components, aerosol administration synchronization, and/or Excipient Enhanced Growth (EEG) technologies were utilized to develop and test several novel devices and aerosol delivery systems. The first focus of this work was to improve the poor delivery efficiency, e.g., 3.6% of nominal dose (Dugernier et al. 2017), of aerosolized medication administration to adult human subjects concurrent with high flow nasal cannula (HFNC) therapy, a form of continuous-flow non-invasive ventilation (NIV). The developed Low-Volume Mixer-Heater (LVMH) …