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Clemson University

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2012

Articles 1 - 8 of 8

Full-Text Articles in Engineering

Integrated Traffic And Communication Performance Evaluation Of An Intelligent Vehicle Infrastructure Integration (Vii) System For Online Travel Time Prediction, Yongchang Ma, Mashrur Chowdhury, Adel Sadek, Mansoureh Jeihani Sep 2012

Integrated Traffic And Communication Performance Evaluation Of An Intelligent Vehicle Infrastructure Integration (Vii) System For Online Travel Time Prediction, Yongchang Ma, Mashrur Chowdhury, Adel Sadek, Mansoureh Jeihani

Publications

This paper presents a framework for online highway travel time prediction using traffic measurements that are likely to be available from Vehicle Infrastructure Integration (VII) systems, in which vehicle and infrastructure devices communicate to improve mobility and safety. In the proposed intelligent VII system, two artificial intelligence (AI) paradigms, namely Artificial Neural Networks (ANN) and Support Vector Regression (SVR), are used to determine future travel time based on such information as current travel time, VII-enabled vehicles’ flow and density. The development and performance evaluation of the VII-ANN and VII-SVR frameworks, in both of the traffic and communications domains, were conducted, …

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Cad Vs. Sketching: An Exploratory Case Study, David Veisz, Essam Z. Namouz, Shraddha Joshi, Joshua D. Summers Aug 2012

Cad Vs. Sketching: An Exploratory Case Study, David Veisz, Essam Z. Namouz, Shraddha Joshi, Joshua D. Summers

All CEDAR Publications

This paper presents a preliminary comparison between the role of computer-aided design (CAD) and sketching in engineering through a case study of a senior design project and interviews with industry and academia. The design team consisted of four senior level mechanical engineering students each with less than 1 year of professional experience are observed while completing an industry sponsored mechanical engineering capstone design project across a 17 week semester. Factors investigated include what CAD tools are used, when in the design process they are implemented, the justification for their use from the students' perspectives, the actual knowledge gained from their …

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Model Of A Mechanical Clock Escapement, John Wagner, David Moline, Eugene Vold Jul 2012

Model Of A Mechanical Clock Escapement, John Wagner, David Moline, Eugene Vold

Publications

The mechanical tower clock originated in Europe during the 14th century to sound hourly bells and later display hands on a dial. An important innovation was the escapement mechanism, which converts stored energy into oscillatory motion for fixed time intervals through the pendulum swing. Previous work has modeled the escapement mechanism in terms of inelastic and elastic collisions. We derive and experimentally verify a theoretical model in terms of impulsive differential equations for the Graham escapement mechanism in a Seth Thomas tower clock. The model offers insight into the clock’s mechanical behavior and the functionality of the deadbeat escapement mechanism.

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Assembly Time Modeling Through Connective Complexity Metrics, James L. Mathieson, Bradley A. Wallace, Joshua D. Summers May 2012

Assembly Time Modeling Through Connective Complexity Metrics, James L. Mathieson, Bradley A. Wallace, Joshua D. Summers

All CEDAR Publications

This paper presents an approach for the development of surrogate models predicting the assembly time of a system based on complexity metrics of the physical system architecture when detailed geometric information is unavailable. A convention for modelling physical architecture is presented, followed by a sample of 10 analysed systems used for training and three systems used for validation. These systems are evaluated on complexity metrics developed from graph theoretic measures. An example model is developed based on a series of regressions of trends observed within the sample data. This is validated against the systems that are not used to develop …

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Mobile Devices Within Manufacturing Environments: A Bmw Applicability Study, Beshoy Morkos, Torsten Rilka, Joachim Taiber, Joshua D. Summers, Laine Mears, Georges Fadel May 2012

Mobile Devices Within Manufacturing Environments: A Bmw Applicability Study, Beshoy Morkos, Torsten Rilka, Joachim Taiber, Joshua D. Summers, Laine Mears, Georges Fadel

All CEDAR Publications

With the growing need of mobile devices within manufacturing industries, new domains for their use in automotive OEMs have emerged. Advent technology has enabled the development of devices such as ultra-mobile personal computers that provide the function of a computer in a compact, mobile configuration and augmented reality (wearable mobile devices) in a production environment where hands free operation is essential. The use of mobile devices allows for more effective communication and data sharing/recording. This paper details BMW’s preliminary investigation and applicability study of implementing mobile devices within their manufacturing environment to view potential benefits that could be achieved. Manufacturing …

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Reasons For Change Propagation: A Case Study In An Automotive Oem, Prabhu Shankar, Beshoy Morkos, Joshua D. Summers Apr 2012

Reasons For Change Propagation: A Case Study In An Automotive Oem, Prabhu Shankar, Beshoy Morkos, Joshua D. Summers

All CEDAR Publications

This paper focuses on identifying the reasons for change propagation during the production phase of the product life cycle. Unlike the traditional change propagation study where the focus is within the product, this study is focused to understand the propagation effects of change on other functional silos in the manufacturing firm. First, the reasons for the changes are identified using archival analysis through which it is found that 77.0 % of changes are due to internal reasons while 23.0 % are external. Second, these changes are distinguished into genesis, and propagated changes using a matrix-based modeling approach from which the …

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Predicting Requirement Change Propagation Using Higher Order Design Structure Matrices: An Industry Case Study, Beshoy Morkos, Prabhu Shankar, Joshua D. Summers Feb 2012

Predicting Requirement Change Propagation Using Higher Order Design Structure Matrices: An Industry Case Study, Beshoy Morkos, Prabhu Shankar, Joshua D. Summers

All CEDAR Publications

This research examines higher order design structure matrices as requirements change modelling tools to predict requirement change propagation through two large-scale industry design projects. Due to the iterative nature of design, requirements will evolve and change. Changes in requirements can propagate to other requirements on different subsystems leading to possible increases in the project cost and lead-time. Predicting these requirement changes enables the designers to foresee unanticipated changes and maximises the probability for the project's success. These studies reveal that second-order relationships are influential in predicting requirement change propagation. Unforeseen propagation occurring in first-order form was rare, rather it was …

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Manufacturing Process Modeling And Application To Intelligent Control, M. Laine Mears, Parakshit Mehta, Mathew Kuttolamadom, Carlos Montes, Joshua Jones, Wesley Salandro, Drew Werner Jan 2012

Manufacturing Process Modeling And Application To Intelligent Control, M. Laine Mears, Parakshit Mehta, Mathew Kuttolamadom, Carlos Montes, Joshua Jones, Wesley Salandro, Drew Werner

Publications

This paper reviews the major findings and intellectual contributions made over the past five years through research in the laboratory of Dr. Laine Mears at Clemson University. The focus of the laboratory’s work is in modeling of traditional and novel manufacturing processes, and application of such models to process control through model-based control strategies. Introducing intelligence to the manufacturing process through physical descriptions of the phenomena being controlled allows for more precise control as compared with reactive systems or those with simple feed-forward control schemes. For traditional processes, new approaches to process characterization allow for more precise control. For novel …

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