Mechanical Engineering Commons^™

Comparison Of Empirical And Analytical Eigenfunctions As Bases For Reduced Order Methods In Heat Transfer, Jakob G. Bates, Matthew R. Jones, Christopher R. Dillon, John Tencer

Student Works

Reduced order methods using spectral representations show promise in facilitating and accelerating heat transfer analyses. This paper proposes a taxonomy for reduced order methods, classifying a method as reduced order compression, modelling, or analysis. The performance of bases formed with analytical and empirical eigenfunctions are compared for representative reduced order tasks. The Akaike Information Criterion is applied in a novel way to compare the performance of these bases. The present study finds that both bases are parsimonious for reduced order compression tasks. Empirical eigenfunctions are more robust to for reduced order modelling with variations in modelling parameters such as thermal …

Commentary: A Patient-Specific Lower Extremity Biomechanical Analysis Of A Knee Orthotic During A Deep Squat Movement, Christine Dailey Walck

Publications

The recent study by Walck et al., titled “A Patient-Specific Lower Extremity Biomechanical Analysis of a Knee Orthotic during a Deep Squat Movement,” provides a novel insight into the biomechanical impacts of knee orthotics, particularly the non-linear spring-loaded (NLSL) knee joint orthosis (KJO)1 . This commentary aims to delve into the implications, interpretations, and evaluations of the findings, contextualizing them within the broader discourse on knee orthotics.

Redesign Of Leg Assembly And Implementation Of Reinforcement Learning For A Multi-Purpose Rehabilitation Robotic Device (Roborehab), Jacob Anthony, Chung-Hyun Goh, Alireza Yazdanshenas, Yong Tai Wang

Mechanical Engineering Faculty Publications and Presentations

Patients who are suffering from neuromuscular disorders or injuries that impair motor control need to undergo rehabilitation to regain mobility. Gait training is commonly prescribed to patients to regain muscle memory. Automated-walking training devices were created to aid this process; while these devices establish accurate ankle-path trajectories, the knee and hip movements are inaccurate. In this work, a redesign of the leg assembly in a multi-purpose rehabilitation robotic device (RoboREHAB) was explored to improve hip- and knee-movement accuracy by adding an extra link and rollers to the assembly. Motion analysis was employed to test feasibility, reinforcement learning was utilized to …

Experimental Environmental Profiles And Sloshing Dynamics Aboard Zero-G Aircraft, Pedro J. Llanos, Sathya Gangadharan, Kevin Crosby

Publications

This study presents the results of a parabolic flight experiment to study the sloshing dynamics of the magneto-active propellant management device experiment. This device utilizes a magnetoactive membrane and magnets located external to the tank to effectively damp the liquid free surface motion. This research work establishes a benchmark with sloshing analytical formulation and sensor calibration methods that can be used to characterize future research parabolic flights while providing important environmental profiles measured during flight, such as accelerations, pitch angle, velocity, temperature, total volatile content, carbon dioxide, relative humidity, magnetic field, and radiation. Correlation between these flight variables and the …

Sustainable Phone Housing, Jonah Milnor

All Undergraduate Projects

Most commercially available smartphones posed a challenge to consumers due to the use of adhesives, which not only served to seal out dust and water but also hindered repairability and hardware replacement. Drawing inspiration from successful smartwatch designs employing gaskets for water resistance, this project aimed to adapt such design principles to the smartphone form factor.

Utilizing SolidWorks for design and subsequent 3D printing and CNC machining for prototyping, 3D models of a smartphone housing were crafted. The objective was to attain a level of water and dust resistance equivalent to that of model smartphones, utilizing sealing methods equivalent to …

Rc Baja Car Suspension & Steering, Jarvis Hudnall

All Undergraduate Projects

Students at Central Washington University were faced with a challenge to engineer an RC Baja Car with a focus between drivetrain and chassis or suspension and steering for a competition. The different foci were split between two team members and the engineering for this report is focused on steering and suspension.

The suspension and steering components underwent the process of developing calculations for all individual parts for design. The design process included using CAD software to provide a 3D model for each individual part. To save time, 3D modeling software helped find fitment issues before the RC Car was manufactured …

Nasa Student Launch Payload Kinetic Energy Absorption, Harrison X. Fishburn

All Undergraduate Projects

The challenge given by NASA was to design and build a reusable payload capable of a human survivable landing, without the use of a parachute or streamer.

The method chosen to accomplish this was a large spring to extend and mitigate impact forces over a few seconds. The device was attached to the lower end of the payload to act as a secondary force reducer, with the primary device being the gyrocopter assembly built by Brycen. Two 6061 aluminum rods, attached together with a spring, act as the main structure of the payload, connecting the spring assembly, the capsule, the …

Tractor Test 2282: John Deere 9rt 590 Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Me-Em 2022-23 Annual Report, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University

Department of Mechanical and Aerospace Engineering Annual Reports

Table of Contents

• Research Updates
• Curriculum and Instruction
• Facilities
• New Faculty
• Research, Machine Learning
• Research, Ana Dyreson
• In Memoriam
• Student Success
• Alumni Profile and Activity
• Graduates
• Faculty Awards and Honors
• Patents and Publications
• Donors
• Grants and Contracts

Balsa Bridge, Caleb T. Lovett

All Undergraduate Projects

The problem presented throughout this report was to create a small-scale bridge made entirely out of balsa wood and glue, that could withstand substantial force, as well as perform a lifting/lowering cycle. Other requirements associated with the bridge were properties of weight, deflection, size, and shape. This problem presented a challenge that tested the mathematical side of engineering, being strongly reliant on statics, mechanics of materials, and mechanical design analyses.

To approach this problem, the first step was to complete in depth calculations of the chosen design. With this done, manufacturing and assembly was able to be completed. With a …

Rc Baja Drivetrain And Chassis, Beni Ntanda

All Undergraduate Projects

The RC vehicle comprises 4 crucial subsystems: the chassis, drivetrain, suspension, and steering. This paper will cover the chassis and drivetrain, and my partner Noah Stevens will cover the suspension and steering. The chassis serves as a robust framework housing all vehicle components, while the drivetrain transmits power from the motor to the wheels, propelling the vehicle. An efficient drivetrain typically sacrifices speed for enhanced torque, aiming to minimize energy losses. Meanwhile, an ideal chassis features minimal deflection and user-friendly mounting points. This RC vehicle participated in the CWU RC Baja competition, aiming to rank among the top contenders.

The …

Rc Baja Steering And Suspension, Chayce Williams

All Undergraduate Projects

The engineering objective of this project are designing, manufacturing, and testing the most efficient and strongest possible RC Baja Steering and Suspension system that the engineer could produce with the provided or acquired equipment, and materials.

This was all done successfully over the school year. During the Fall quarter, the RC car was undergoing designing, and in these design processes, mechanics of materials, statics, and dynamics, were used to come up with the most adequate materials and design. Computer aided designed (CAD) models were then created to get a RC Baja CAD assembly. Winter Quarter of the school year was …

Articulating Balsa Wood Bridge, Kyle Barayuga

All Undergraduate Projects

Bridges have been used worldwide to allow passage between untraversable terrain. These bridges are built according to their terrain and environment, while also withstanding the forces of objects going across them. This project explores building a bridge under specific design restrictions to be able to simulate objects traversing across and under it. The device consists of a bridge, utilizing a Pratt truss design, and an articulation tower which are mechanically linked using a hinge. The articulation tower allows the bridge to be raised and lowered, simulating an object to be passed under. Raising and lowering the bridge consists of using …

Rc Baja: Steering And Suspension, Rogelio Arroyos, Roberto Vieyra

All Undergraduate Projects

Students attending Central Washington University teamed up to manufacture an RC car to compete against peers in the RC Baja competition events as a senior project. The project was split between the two individuals, Rogelio was responsible for the steering and suspension, while Roberto was responsible for the chassis and drivetrain. The team collaborated to brainstorm ideas that would fit the requirements applied.

The RC was built with 3D printed parts and designed using engineering methods such as mechanics of materials, dynamics, and statics to successfully compete in the BAJA events and meet requirements. Before it was ready for competition, …

Rc Baja Competition - Suspension And Steering, Skyler Gordon

All Undergraduate Projects

The objective of this project is to design and construct a vehicle that will compete in the RC Baja Competition. As this project will be split between two students, this paper will be focusing on suspension and steering while the partner will focus on chassis and drivetrain. The vehicle will be tested in three different categories: the sprint, the slalom, and the Baja. These categories will test its speed, turning capabilities, and its overall capability in rough terrain.

As this paper focuses on the suspension and steering. Several analyses and decision matrix were used to find the best dimension along …

Rc Baja Car Drivetrain & Chassis, Boe Hartman

All Undergraduate Projects

The object of this report is to design, manufacturer, and build an RC Baja Car to compete in the annual ASME RC Baja Competition.

In order to design, manufacture, and build the RC Baja Car, various methods and approaches are utilized throughout to meet the specified criteria of the competition along with the teams’ personal requirements. Initially, after an overall design was acquired, analysis is done to ensure a working device. Analysis such as power requirements to verify the motor will meet ROAR requirements and suffice for the 4wd system utilized in the device. Statics and dynamics analysis are utilized …

Jcati Carbon Fiber Recycler - Conveyance System, Victor Limwanich

All Undergraduate Projects

The JCATI Carbon Fiber Recycler shreds, transports, and bakes carbon fiber within its system to recycle it by burning off the resin within the material at temperatures over 500 Celsius. The conveyance portion of the recycler, as it stood in previous iterations, has not been able to transport then batch the shredded material before going into the oven. Doing so would introduce more system independence without the need for someone to manually collect the shredded batches from the conveyor belt.

After designing the project in SolidWorks to meet the objective, it was manufactured using various methods. Some parts were purchased …

An Automated On-The-Go Unloading System Reduces Harvest Operator Stress Relative To Manual Operation, Travis A. Burgers, Kusha Kamarei, Mukund Vora, Matthew Horne

Mechanical Engineering Faculty Publications

On-the-go unloading improves harvest operational efficiency, but it requires skilled labor because it is challenging and stressful to balance numerous concurrent tasks. Harvest automation reduces workload, stress, and fatigue. The objective of this study was to determine if using a commercially available, automated on-the-go unloading system (Raven Cart Automation TM , RCA, Raven Industries) would reduce operator stress com- pared to manual operation. Nine grain cart tractor operators and six combine operators participated in this study. Operators performed their typical harvest operation, except to alternate on-the-go unloading using RCA or operating manually. Skin conductance (elec- trodermal activity) was measured with …

Process Simulation For Converting Co2 Emissions From The Cementindustry To Dimethyl Ether, Nour Abou Seada, Dina Aboelela

Biochemical Engineering

Climate change is the leading severe problem in the twenty-first century, which is associated with greenhouse gas emissions,carbon dioxide that is the foremost cause of global warming and super greenhouse effect. In this concern, to avoid hazardousproblems, the steady stream of CO2 effluents existing in the atmosphere must be transformed to beneficial products for beingused as an abundant chemical feedstock. Implementing a new green strategy, which is known for the catalytic hydrogenationof CO2 into alternative fuels and valuable chemicals, will be a long-lasting solution to alleviate CO2 emissions. In this paper,a process simulation showing the synthesis of dimethyl ether (DME) …

Rc - Baja Suspension And Steering, Noah M. Stevens Eit

All Undergraduate Projects

The engineers at Central Washington University were each asked to produce a device to compete in the ASME RC Baja competition. The principle-engineer set out to create a system that allowed an RC car to be controllable over a variety of terrain utilizing suspension and steering principles. The steering and suspension designed by the engineer was implemented in part with a drive train and chassis that was designed by a partner engineer.

The Engineer chose to utilize an independent front suspension with a solid rear axle for his design. This design was chosen because the independent front end allowed for …

Rc Baja: Drivetrain And Chassis, Sam Wang

All Undergraduate Projects

The RC Baja project aims to develop a high-performance RC vehicle for Baja-style racing through a comprehensive design, manufacturing/prototyping, and testing. The objective is to address engineering challenges related to ensuring durability, efficiency, and performance while navigating rugged terrains and obstacles.

To achieve this objective, the engineers conduct extensive research to guide the design process, with a specific emphasis on the drivetrain and chassis components. Detailed CAD modeling is utilized to refine the design of the drivetrain, incorporating elements such as gear ratios, differential systems, and torque distribution to enhance power delivery and traction. Similarly, the chassis design prioritizes factors …

Zno Varistors—Preparation Of Nano And Micro Sized Powders By Mechanical Methods For Low And High Voltage Varistors, Maura Kelleher

Books/Book Chapters

ZnO-Bi2O3-Sb2O3 varistors are as essential today as they have been since their discovery five decades ago. Their role is to protect other electronic components against oncoming surges of electrons and survive. The demands on varistors are increasing. Electronic components are becoming smaller and more sensitive, and the metal oxides from which varistors are made are precious. Every aspect of their structure (macro, micro, nano and atomic) determines how they perform and survive. Each stage and variable within the powder metallurgy process is important. The mechanical methods in preparing nano and micro sized metal oxide powders are outlined in this chapter.

Dice Are Blessed Or Cursed, Warren Campbell, Cameron Miller

SEAS Faculty Publications

Dice are cursed or blessed; that is, they roll low or high, but they are never fair. They cannot be manufactured with uniform density and geometric precision. This is particularly true of 20-sided dice or D20s. Faces are smaller than 6-sided dice, and manufacturing tolerances are similar. However, some dice are fairer than others. In our studies of plastic-mold dice about 1 in 4 test fair in 3000 rolls. We have used different statistical tests, including chi-square, modified Kolmogorov Smirnov, and double binomial tests. Of these, the method that consistently performed better is the chi-square goodness of fit test. The …

Hydrogen Production From Microbial Electrolysis Cells Powered With Microbial Fuel Cells, Dina Aboelela

Biochemical Engineering

No abstract provided.

Tractor Test # 2283: Claas Axion 920, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Optimal Additive Fabrication Of Patient-Specific Bone Tissue Scaffolds Through Material Formulation, Computational Flow Simulation, And Material Deposition Monitoring, Ethan O’Malley

Theses, Dissertations and Capstones

The advancement of additive manufacturing technologies has opened new avenues for fabricating biocompatible and structurally functional bone tissue scaffolds, essential in treating osseous fractures, defects, and diseases. This research aims to develop mechanically strong, dimensionally precise, and patient-specific porous bone tissue scaffolds that provide both structural integrity and biological functionality. Through three interconnected studies, several key challenges in the fabrication of these structures using the PME additive manufacturing process are addressed. First, the influence of polysaccharide and hydroxyapatite concentrations on the compressive modulus of PME-printed porous scaffolds is investigated. By creating structures with varying hydroxyapatite and polysaccharide compositions, the study …

Nebraska Summary #1285: Massey Ferguson 8s 205, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Investigating The Impact Of Stress And Irradiation Flux On Latent Track Formation In Tio2 Under Swift Heavy Ion Irradiation: A Phase Field Study, Ebrahim Ebrahimi

Browse all Theses and Dissertations

Swift Heavy Ions (SHI) irradiation, characterized by high kinetic energy ions, induces significant material/structural modification, e.g., latent track. However, the intricate interaction among various physics, i.e., mechanical stress, phase transition, and heat transfer, has been ignored in the continuum-based approaches in favor of simplicity. Here, we developed a two-dimensional coupled phase-field inelastic-thermal spike (PF-iTS) model to investigate the effect of thermal crosstalk, elastic energy, and irradiation flux on latent track formation. A particular focus is placed on investigating the influence of internal mechanical stress on latent track formation. Simulation results reveal a shift in critical stopping energy and a reduction …

Architectural Optimization Of Emulator Embedded Neural Networks For Aerospace Vehicle Design, James L. Schmitz Ii

Browse all Theses and Dissertations

An approach for the architecture optimization of emulator embedded neural networks is proposed. While the emulator embedded neural network has been shown to provide accurate predictions with suitable emulators, there is still a challenge regarding how to select the optimal hyperparameters of network architectures, such as, the number of neurons, layers, types of activation functions, etc. The selection of hyperparameters greatly affects the performance of the neural network model training both in terms of accuracy and efficiency. To address this challenge, this study proposes an algorithm that tests a range of hyperparameters and selects the best performing set. The algorithm …

Deep Learning Based Optical Flow Analysis Of High-Speed Flows, Daniel H. Zhang, Zifeng Yang

Mechanical and Materials Engineering Faculty Publications

Two-dimensional Rayleigh scattering imaging is utilized to quantify the high-speed flow velocity by employing deep learning based optical flow analysis, along with density fields from Rayleigh scattering intensity profiles.