Design And Analysis Of A Polycentric Prosthetic Knee Joint

Julio Aira IVME 481 Project Prospectus-ONE PARAGRAPHDesign and Analysis of a Polycentric Prosthetic Knee JointFor my project, I would like to use Working Model and Solidworks to analyze and furtherdevelop a prosthetic knee. Typically, prosthetic polycentric knees use a four-bar mechanism toprovide trans-femoral amputees with great stability and mobility. Shown below is a kinematicskeletal diagram and topology for the polycentric prosthetic knee, from homework 2. Asupplementary goal of this project will include 3D-printing a functioning prototype to properlydisplay the dynamics of the mechanism. To model this device, I will use Solidworks. Tofabricate this device out of PLA plastic, I will use my personal 3D-printer (Ender 3-Pro). Myhope is that this device will be able to withstand the weight of a small child, due to the limits ofmy material selection. I will use Working Model to analyze the position, velocity, andacceleration during the gait cycle of an individual. Since my sophomore year at Penn State, Ihave researched ways to further develop prosthetics, such as prosthetic test sockets. This projectwill complement my passion for developing and evaluating prosthetic devices.

David Dzordzorme, Sam SmithME 481 Final Project ProspectusFebruary 24, 2021The mechanism we are choosing to model for our final project is a locomotive mechanism.Locomotive mechanisms were popularized by steam engine trains. These mechanisms canbecome rather complex when there are more wheels driven by it. For our analysis, we will utilizea simple two wheel forward driving locomotive mechanism laid out like the one seen in thefigure below. The mechanism is driven by a single piston running on steam that links to astraight bar that spins the wheels. The piston also flips the side of the piston cylinder that allowsthe flow of steam which is what drives the motion of the piston. For this project, I plan to workwith Sam Smith since the fabrication of such a mechanism seems challenging to complete alone,and we were both interested in pursuing a locomotive type mechanism for this project. We feelthat the skills learned in this class will allow us to analyze the kinematics of our finalmechanism. Our goal is to further our understanding on how locomotives and similarmechanisms work. We plan on using either Working Model/MATLAB or SolidWorks tovisualize the motion and display plots that describe the motion. If possible and time-permitting,we would also like to utilize the learning factory to either 3D print or machine our mechanism.We are excited about the potential of this project and hope that our idea gets approved.Thanks!

Figure 1. Diagram of basic Locomotive Mechanism provided by YouTube user Wheels Tube

Samantha Elduff and Justin SchmoyerME481 Project Prospectus - Double Wishbone Suspension Geometry24 February 2021Our team is looking to analyze the geometry of double wishbone suspension todetermine different characteristics within the assembly. Our intention is to utilize WorkingModel to model the suspension system and analyze the camber angle range of the wheelsduring various characteristic situations. Some potential situations include: camber changeexperienced under load (i.e. from turning or the road), suspension angles and geometry. Welook to assemble a similar suspension setup as a 1992 miata to model values for a realisticapplication. Modern suspension can be made with adjustable A-arms, to adjust for a fullytuned suspension setup as desired. We look to analyze this setup as a 2-D 4-bar linkagesystem.Image Source: ension.html

Daniel Fescenmyer, Kyle PartridgeME481 – Project ProspectusFebruary 24, 2021We would like to analyze the biomechanics of the prehensile tail found in spider monkeys. We wereattracted to this idea since the spider monkey’s prehensile tail is a very unique evolutionary feature thathas allowed it to excel in its environment. Further, the mechanics of the prehensile tail are veryinteresting, and we are both eager to learn more. The prehensile tail is able to redistribute the monkey’scenter of mass in order to allow them to balance themselves high up in canopies, thus allowing thesemonkeys a wide range of access to different food sources that would otherwise not be accessible. Weplan to model this motion in Working Model and then extract the data points into MATLAB for furtheranalysis in order to demonstrate how this unique adaptation has allowed spider monkeys to excel injungles of South America. The image below illustrates the crucial function that the prehensile tail files/2017-07/story-talented-tales.jpg

I will model the motion of a straight bar dead lift, which is compound weightlifting movement.Specifically, I want to film myself performing the lift and model my exact motion. I will comparemy movement and model (in Working Model or SolidWorks) to Mark Rippetoe’s StartingStrength diagrams and force analyses; In so doing, I hope to find errors in biomechanicalefficiency that I can remedy. I also intend to analyze the forces present in my leg from the floorto the knee, from the knee to the hip, and from the hip to the upper spine.

Nicholas GalloME 481Project Prospectus02/22/21For my project I would like to analyze the elbow joint during a bicep curl. The stepswould be to convert the four muscles and two bones into a mechanical system to perform acomputer aided analysis, and then simulate a bicep curl with a designated mass. The analysis ofthe elbow will be to see what stresses and strains are placed upon each link in the system, andthen compare the simulated data to experimental data. The computer designed elbow will beanalyzed by hand as well to check the results from the computer analysis. The goal is tocompare the simulated and experimental data and determine if the simple modeled system canaccurately represent an actual human elbow. Please see an image below of the human elbow Iwill try to model.Total Elbow Joint Replacement. (2019). [Illustration]. eplacement/

Raymond GirroirProject Prospectus:I would like to design a mechanism that would provide a timed release/trigger to a larger system. A lotof systems use electronics or sensors to initiate the next step in a larger system and I would like toconvert that to a mechanical only system to eliminate a power source. The larger system in this case is aset of spring-loaded blocks that need to be released after some time t (1-5 seconds) The system holdingthe blocks is set to release on demand and I would like a mechanism to interface with the system so Ican delay the release for various time steps.

For the ME 481, I want to work with Sung Jun Won as a team. We decide to choose theancient Asian crossbow as the mechanism for analysis. The ancient Chinese crossbow hasan essential component which is the vertical trigger. The vertical trigger is a complexmechanism typically composed of three bronze pieces inside a hollow bronze enclosure.This trigger acts as the trigger for the crossbow and functions as the iron sight for thecrossbow. The project will be focused on the mechanism of the vertical trigger andbuilding the SolidWorks model for the entire crossbow.Figure 1. Han dynasty Crossbow modelFigure 2. Vertical trigger

ME 481 – ProspectusRebecca MillerThe bull gear in an antenna is one of the most critical gears allowing for elevation and rotation of thedish. My project will dive into this mechanism’s purpose, kinematic structure, and discuss the dynamicsat play. It is my hope to demonstrate my analysis through a series of drawings, pictures, and videos; withthe permission of my contract, I plan to use actual data to help depict the kinematics and dynamics ofthis mechanism.

Aaron MorrissettePSU World CampusME 481 – Spring 2021Final Project ProspectusProposed Project Topic: Reciprocating SawFor my final project, I am proposing doing a mechanical analysis of a hand-held power tool, thereciprocating saw – commonly referred to as a Sawzall. This is inspired from my enjoyment of owningand using power tools, and for a sincere passion of mine for tool teardowns to see how pieces aremanufactured, and to see exactly how the assemblies work. Focus areas in the project can include thefollowing: completing my own tool teardown to analyze and understand the reciprocating sawcomponents, creating a functional model in Working Model to understand the mechanical performancecharacteristics, and modeling several of the components in SolidWorks (which could lead to 3D printingpieces of a simplified mechanical mechanism to represent the tool).If approved, further details on what will be included in the project and how it will be executed will beprovided in the one-paragraph project concept submission. Thank you!

Project prospectusI have been interested regarding the wave energy that exists around the shores of America andthe models and systems used to tap into it. I want to base my project on either analyzing a fourbar mechanism that is used in this process or have an idea of my own as a hybrid of multipleother ideas. I have done some research on tools that use the slider crank mechanism and wouldmost likely make a project based on that.

Daniel Fescenmyer, Kyle PartridgeME481 – Project ProspectusFebruary 24, 2021We would like to analyze the biomechanics of the prehensile tail found in spider monkeys. We wereattracted to this idea since the spider monkey’s prehensile tail is a very unique evolutionary feature thathas allowed it to excel in its environment. Further, the mechanics of the prehensile tail are veryinteresting, and we are both eager to learn more. The prehensile tail is able to redistribute the monkey’scenter of mass in order to allow them to balance themselves high up in canopies, thus allowing thesemonkeys a wide range of access to different food sources that would otherwise not be accessible. Weplan to model this motion in Working Model and then extract the data points into MATLAB for furtheranalysis in order to demonstrate how this unique adaptation has allowed spider monkeys to excel injungles of South America. The image below illustrates the crucial function that the prehensile tail files/2017-07/story-talented-tales.jpg

Eric StaabThomas PatotaProject ProspectusIndustry today relies more and more on automation. Whether it be small assembly linesor humongous robotic arms, these robots offer an interesting view of dynamics that compoundsover multiple moving parts. For our project, we wish to work on a Programmable UniversalMachine for Assembly (PUMA) robotic arm because it is a practical model of a widely usedmachine and offers insights into forward kinematics.

Ryan PicconeProject ProspectusFor my end of semester project, I will be working alone to model and simulate a spinning wheel found inmy grandparents house. I do not currently have a picture of it but attached below I have found a similarone online found below. I chose a spinning wheel since it always amazed me as a child, but now that Ilook at it, it looks simpler than I remember.I would create a Working Model representation of the spinning wheel with three varying radii, one trueto size, one smaller, and one larger. I would create a MATLAB script to record and compare thedifference in velocity and acceleration, and record the force required to maintain a spinning wheel.Depending on my findings, if a force is unexpected I could do stress analysis on a SolidWorksrepresentation of the wheel.