Volume 9: Engineering Education最新文献

{"title":"2 DOF Compliant 3D-PLE System Demonstrating Fundamentals of Vibrations and Passive Vibration Isolation","authors":"Niko Giannakakos, A. Tekes, T. Utschig","doi":"10.1115/IMECE2020-23032","DOIUrl":"https://doi.org/10.1115/IMECE2020-23032","url":null,"abstract":"\u0000 Mechanical engineering students often learn the fundamentals of vibrations along with the time response of underdamped, critically damped, and overdamped systems in machine dynamics and vibrations courses without any validation or visualization through hands-on experimental learning activities. As these courses are highly theoretical, students find it difficult to connect theory to practical fundamentals such as modeling of a mechanical system, finding components of the system using experimental data, designing a system to achieve a desired response, or designing a passive vibration isolator to reduce transmitted vibrations on a primary system. Further, available educational laboratory equipment demonstrating vibrations, dynamics and control is expensive, bulky, and not portable. To address these issues, we developed a low-cost, 3D printed, portable laboratory equipment (3D-PLE) system consisting of primary and secondary carts, rail, linear actuator, Arduino, and compliant flexures connecting the carts. Most of the educational systems consist of a mass limited to 1DOF motion and multi-degrees of freedom systems can be created using mechanical springs. However, in real-world applications oscillations in a system are not necessarily due to mechanical springs. Anything flexible, or thin and long, can be represented by a spring as seen in torsional systems. We incorporated 3D printed and two monolithically designed rigid arms connected with a flexure hinge of various stiffness. The carts are designed in a way such that two flexible links can be attached from both sides and allow more loads to be added on each cart. The system can be utilized to demonstrate fundamentals of vibrations and test designs of passive isolators to dampen the oscillations of the primary cart.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114423233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Innovation Bank: Blockchain Technology and the Decentralization of the Engineering Professions","authors":"Dan Robles, B. Layton","doi":"10.1115/IMECE2020-23015","DOIUrl":"https://doi.org/10.1115/IMECE2020-23015","url":null,"abstract":"\u0000 The Innovation Bank is a novel business method that integrates and capitalizes knowledge assets. The Innovation Bank is an application of game theory, actuarial math and a simple native “proof-of-stake” blockchain. The system aims to unify the global engineering and scientific disciplines by incentivizing individual practitioners to form knowledge asset networks among each other by producing claims and validations related to observable and measurable events. Each claim and associated validation forms a node in a network for which each participant is awarded a cryptographic token memorializing earned stake (equity) in the system. A secure, validated, and decentralized knowledge repository and access management system is secured by a simple native blockchain. Revenue is generated through the liquidation of earned tokens on an external market to third parties seeking access to network metadata for business intelligence. The intrinsic value of the network grows as the number of participants increases. As participation increases, the quantity and quality of the transaction records also increases. Third-party buyers may include banks, insurance companies, and private enterprise.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125154163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experiential Learning in STEM for a Diverse Student Population at the University of the District of Columbia (UDC) Through the Implementation of the UDC Rover Project","authors":"G. D'Orazio, Jiajun Xu, S. Haghani","doi":"10.1115/IMECE2020-24091","DOIUrl":"https://doi.org/10.1115/IMECE2020-24091","url":null,"abstract":"\u0000 In 2018, the University of the District of Columbia (UDC) participated in the NASA Human Exploration Rover Challenge for the first time in the school’s history. An interdisciplinary team of students designed and fabricated a two-person, human-powered rover which competed against 100 other colleges and universities. Based on their success, in 2019 UDC again formed a team to participate in the challenge, improving on the 2018 rover design and performance. This paper reports the process of implementing this experiential learning activity and how this project has contributed to the STEM curriculum at UDC, and recruitment and participation of underrepresented STEM students. Lessons learned from implementing this project is also shared and discussed in this paper.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128897410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Educational Mobile Soccer Platform Teaching Mechanical Design and Fabrication for Mechanical Engineering","authors":"HyunYong Lee, Y. Sim, Hwijin Park, Hoon Min Park, H. Yi","doi":"10.1115/IMECE2020-24191","DOIUrl":"https://doi.org/10.1115/IMECE2020-24191","url":null,"abstract":"\u0000 The mobile platform is an attractive educational tool that has brought to myriad effective benefits for a variety of the application fields. Furthermore, application of the mobile platform to engineering education has greatly assisted the engineering students’ firsthand experiences in college. However, most of the robotics classes offered today are concentrating on mechatronics and software education. For the advancement, this paper develops the mobile platform for the effective curriculum in teaching design and fabrication of robots in the house. The design of the proposed mobile platform bases on the knowledge of the majors subject from mechanical engineering. Through the dynamic simulation, the possibility of an introduction of the developed platform to robotics education is verified. Dynamic simulation experiments with the maximum velocity and acceleration of this system are carried out to check the application for educational purposes. As a final step, components of the platform are fabricated and assembled.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125846157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pragmatic Approach to Teaching Introduction to Machine Design","authors":"K. Anderson, Clifford M. Stover","doi":"10.1115/IMECE2020-23004","DOIUrl":"https://doi.org/10.1115/IMECE2020-23004","url":null,"abstract":"\u0000 This paper presents examples of teaching Mechanical Design using a pragmatic approach. The pedagogy used herein embeds real-world experience and projects into the curriculum by taking representative case studies from industry and creating course projects. The approach focuses on using sanity checks using free-body diagrams and hand-calculations, materials specification and proliferate used of commercial off the shelf parts supplier catalog data. Case studies from course projects are presented demonstrating the above skill set reinforcement. The assessment of the student work is presented as it is related to the ABET learning outcomes of the mechanical design curriculum track.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116063575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of the Positioning Process of Objects by the System of Oblique Friction Force Fields on the Example of the MSC Adams Model","authors":"T. Piątkowski, M. Wolski","doi":"10.1115/IMECE2020-23026","DOIUrl":"https://doi.org/10.1115/IMECE2020-23026","url":null,"abstract":"\u0000 The paper concerns modelling of the rotational positioning process of cuboid objects with the system of oblique friction force fields produced by two conveyors. These conveyors are used when introducing streams of objects onto trays of the cross-belt sorting system. The purpose of positioning is to place the objects parallel to the edges of the trays with the greatest possible precision. The positioning precision depends on the choice of the conveyors’ motion velocities and conveyors’ position to each other, which can be determined on the basis of numerical simulations. During theoretical analyses, contact and friction models available in the MSC Adams environment were taken into account.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122805701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Incorporating 3D Printing to Bridge Two Introductory Courses in Mechanical Engineering","authors":"Onur Denizhan, M. Chew","doi":"10.1115/IMECE2020-23338","DOIUrl":"https://doi.org/10.1115/IMECE2020-23338","url":null,"abstract":"\u0000 A course in Computer Graphics using SolidWorks™ is one of the very first courses that a Mechanical Engineering major would take within the department at Lehigh University. In this course, students learn the basics of engineering graphics with a view towards engineering design. Such a course gives students an overall view of not just the mechanics of creating engineering drawings using SolidWorks, but also one of understanding the consequences of their drawings as they affect tolerances, material selection, fabrication processes as well as the viability of their designs. The very next introductory mechanical engineering course is a laboratory dealing with engineering measurements, data acquisition and testing. This article reports on the use of a 3-D printing exercise to bridge these two somewhat very different courses with different objectives, thereby giving students an early start into understanding the process of design; from a concept to its design and fabrication, and finally, testing and analysis of data. Moreover, it gives a fundamental understanding of the use of 3-D printing that many students would end up using for their Senior Design course in their senior year.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"236 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120871888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Demonstrating the Generation of Bond Graphs From 3D Assemblies","authors":"Corey J. Alicchio, Justin S. Vitiello, P. Radhakrishnan","doi":"10.1115/IMECE2020-24043","DOIUrl":"https://doi.org/10.1115/IMECE2020-24043","url":null,"abstract":"\u0000 The bond graph method provides a generic and simple way to compute differential equations and dynamic responses for complex mechatronic systems. This paper will illustrate the process of automatically generating bond graphs from 3D CAD assemblies of gear-trains. Using appropriate CAD application programming interfaces (APIs), information on parts and mates within an existing assembly is extracted. The extracted information is stored as an identity graph, which also stores all geometry and mass related information of every part. Grammar rules are then used to transform the identity graph to a system graph, which is then converted to bond graph using an existing bond graph generation program. The paper will discuss the process, challenges and planned future work.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"345 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124260956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Emotional Tools Design: A Project to Increase Empathy, Engagement and Interest in Industrial Design Students","authors":"Juan-Carlos Rojas, Gerardo Muniz, J. L. Higuera-Trujillo","doi":"10.1115/IMECE2020-23687","DOIUrl":"https://doi.org/10.1115/IMECE2020-23687","url":null,"abstract":"\u0000 Empathy is the ability of people to identify emotional aspects of others. A fundamental aspect to teaching in design education must be empathy. This paper presents the design process of an emotional tools using emoticons or emojis for evaluated products as educational exercise. The dynamics behind of the tool is the empathy experimented during the develop of the emojis characters. The project was implemented in the second period of the second year, with an execution time of 5 weeks. A series of surveys were conducted to assess perception of aspects such as utility, novelty, sensitivity and relevance of the project, in addition to knowing the progress of empathy evoked by the students dynamic. The results revealed the following findings: The opinion of 25 students describe their wide acceptance of this project methodology. Students considered the relevance of assessment processes, their recommendation to use those processes, and invited other students to develop it. Also, student’s positive perception about utility, novelty, sensibility and relevance of project dynamics are not determined by acceptance of this type of project. The preliminary results suggest that this educational exercise has the potential to cultivate or train empathy and other skills in design and engineering students.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122533779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Filter Type and Filter Size on Roundness/Circularity Measurement Using Different Mathematical Algorithms","authors":"C. Sahay, Suhash Ghosh, J. Premkumar, Sivaraj Ramachandran","doi":"10.1115/IMECE2020-23575","DOIUrl":"https://doi.org/10.1115/IMECE2020-23575","url":null,"abstract":"\u0000 In the manufacturing industry, it is almost inconceivable to produce a rotating component without a minimal amount of roundness tolerance. The importance of studying roundness form deviations of circular and cylindrical features is to avoid the excessive lateral or axial runout deviations of the rotating and reciprocating parts during dynamic operations. Considering the precision that industries require now and will require in the future, the authors of this article have chosen roundness (also called circularity per ASME Standards) as the measurable parameter. In order to arrive at precise results, the roundness of a near-to-perfect cylinder is measured on an accurate spindle and turn-table type measuring instrument. Roundness profile, when measured, can be filtered in various ways to reduce or eliminate unwanted details, with a cut-off value set in terms of undulations per revolution (UPR), which gives valuable information about how the component may function, under specific conditions. Looking at real-life roundness graphs it is clear that information exists in the data at different frequencies. A classic example is ovality, which indicates an irregularity that occurs two times in one complete revolution. The workpiece would be said to have two lobes or two UPR. Multiple lobes may be present on a component, a condition contributing to either problems of fit with mating components or part functionality. Additionally, usage of recommended or generalized filter, yields data that approximately lies in the range of acceptability. Thus, there is a strong need to thoroughly understand the effect of filter size and type on roundness (form error for fit) and part functionality. Many published articles have investigated novel filters to accurately and efficiently calculate roundness. However, no work was found in literature that would present the filter size and type selection criteria and correlate it with roundness depending on mathematical method of calculating roundness and further to part functionality. This paper focusses on the investigation of filter type and size effect on roundness based on different mathematical methods of roundness error calculations. By varying parameters like the filter type (Gaussian 50%, 75% and RC Filters), the filter sizes (1 through 500 UPR) and the methods of measuring the roundness — (Least Squares Circle (LSC), Minimum Circumscribed Circle (MCC), Maximum Inscribed Circle (MIC) and Minimum Zone Circles or Separation (MZC or MZS)), roundness at different heights of the workpiece is evaluated. A clear trend is observed from the results, which can further help one to choose filters and their respective sizes for the respective design intent or the application in question.","PeriodicalId":187039,"journal":{"name":"Volume 9: Engineering Education","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129665486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}