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Articles 1 - 19 of 19
Full-Text Articles in Engineering
Evaluation Of Cost Effective Sensor Combinations For A Vehicle Precrash Detection System, John Carlin, Charles Birdsong, Peter Schuster, William Thompson, Daniel Kawano
Evaluation Of Cost Effective Sensor Combinations For A Vehicle Precrash Detection System, John Carlin, Charles Birdsong, Peter Schuster, William Thompson, Daniel Kawano
Mechanical Engineering
The future of vehicle safety will benefit greatly from precrash detection -the ability of a motor vehicle to predict the occurrence of an accident before it occurs. There are many different sensor technologies currently available for pre-crash detection. However no single sensor technology has demonstrated enough information gathering capability within the cost constraints of vehicle manufacturers to be used as a stand alone device. A proposed solution consists of combining information from multiple sensors in an intelligent computer algorithm to determine accurate precrash information. In this paper, a list of sensors currently available on motor vehicles and those that show …
Optimization Of The Fuzzy Logic Controller For An Autonomous Uav, Jon C. Ervin, Sema E. Alptekin, Dianne J. Deturris
Optimization Of The Fuzzy Logic Controller For An Autonomous Uav, Jon C. Ervin, Sema E. Alptekin, Dianne J. Deturris
Industrial and Manufacturing Engineering
In this paper, we describe the optimization of membership functions in an application employing a hierarchical Fuzzy Logic Controller. The size of the rule base is made manageable by using a unique formulation, known as Combs method, to help control the problem of ‘exponential rule expansion’. The optimization is performed using a steady state genetic algorithm with a dynamic fitness function. The controller being developed is designed to fly a small, autonomous parafoil, suitable for short-range reconnaissance and land survey applications. The optimization process is performed in the Matlab/Simulink software environment and incorporates fuzzy logic modules developed in the Matlab …
Experimental Investigation Of The Travel-Time Variance Of An Acoustic Wave Propagating Through The Grid-Generated Turbulence, Tatiana A. Andreeva, William W. Durgin
Experimental Investigation Of The Travel-Time Variance Of An Acoustic Wave Propagating Through The Grid-Generated Turbulence, Tatiana A. Andreeva, William W. Durgin
Office of the Provost Scholarship
An experimental technique for the investigation of the behaviour of acoustic wave propagation through a turbulent medium is discussed. The present study utilizes the ultrasonic travel-time technique to diagnose a grid-generated turbulence. Travel-time variance is studied versus mean flow velocity, travel distance and outer turbulence scale. The effect of thermal fluctuations, which result in fluctuations of sound speed, is studied using a heated-grid experiment. Experimental data obtained using ultrasonic technique confirm numerical and theoretical predictions of nonlinear increase of the travel-time variance with propagation distance, which could be connected to the occurrence of caustics. The effect of turbulent intensity on …
Stability Analysis For Forging Of Porous Bodies, Xuan Wang, Eugene Olevsky, Alain Molinari
Stability Analysis For Forging Of Porous Bodies, Xuan Wang, Eugene Olevsky, Alain Molinari
Industrial and Manufacturing Engineering
The continuum theory of sintering is used for the analysis of the stability of forging of a cylindrical powder specimen. The constitutive properties of the powder material are assumed to follow a power-law creep relationship. Temperature-coupled linear non-uniform stability analyses are carried out. Stability maps are obtained for forging of copper powder components.
Enhancing Student Learning In Mechanics Through Rapid-Feedback, Jennifer Kadlowec, John Chen, Dexter Whittinghill
Enhancing Student Learning In Mechanics Through Rapid-Feedback, Jennifer Kadlowec, John Chen, Dexter Whittinghill
Mechanical Engineering
In this project our goal is to improve student learning in engineering mechanics courses. The aim to improve learning was accomplished by providing rapid feedback to students of their understanding of key concepts and skills being taught. The feedback system acts as a catalyst to encourage students, working in pairs, to assist each other in correcting misconceptions or deepening each other’s understanding of the concept or skill at hand. Furthermore, the system allows the professor to assess the students’ level of comprehension or misconception in a just-in-time fashion, and thus guide the pace of covering the material. The feedback is …
The Effectiveness Analysis Of The Online Tools For Engineering Faculty Needs, Ismail Fidan, Jianbiao Pan, Leijun Li
The Effectiveness Analysis Of The Online Tools For Engineering Faculty Needs, Ismail Fidan, Jianbiao Pan, Leijun Li
Industrial and Manufacturing Engineering
As the use of Internet is increasing dramatically, many faculty members are using it in their teaching, research, and services. The Internet also provides faculty easy access to employee benefits and other information. Many universities are using or plan to use online teaching. Lately, many editorial and funding agencies have also started to initiate online review and decision-making system. These systems have eased the burden on both reviewers and agencies. In this study, a survey was prepared and conducted to investigate the effectiveness of the online tools for faculty needs in authors’ institutions and some other United States universities. The …
A Cartilage Growth Mixture Model For Infinitesimal Strains: Solutions Of Boundary-Value Problems Related To In Vitro Growth Experiments, Stephen M. Klisch, Robert L. Sah, Anne Hoger
A Cartilage Growth Mixture Model For Infinitesimal Strains: Solutions Of Boundary-Value Problems Related To In Vitro Growth Experiments, Stephen M. Klisch, Robert L. Sah, Anne Hoger
Mechanical Engineering
A cartilage growth mixture (CGM) model is linearized for infinitesimal elastic and growth strains. Parametric studies for equilibrium and nonequilibrium boundary-value problems representing the in vitro growth of cylindrical cartilage constructs are solved. The results show that the CGM model is capable of describing the main biomechanical features of cartilage growth. The solutions to the equilibrium problems reveal that tissue composition, constituent pre-stresses, and geometry depend on collagen remodeling activity, growth symmetry, and differential growth. Also, nonhomogeneous growth leads to nonhomogeneous tissue composition and constituent pre-stresses. The solution to the nonequilibrium problem reveals that the tissue is nearly in equilibrium …
Sequential Deposition Of Copper/Alumina Composites, X. Wang, J. Ma, A. Maximenko, E.A. Olevsky, M.B. Stern, B.M. Guenin
Sequential Deposition Of Copper/Alumina Composites, X. Wang, J. Ma, A. Maximenko, E.A. Olevsky, M.B. Stern, B.M. Guenin
Industrial and Manufacturing Engineering
No abstract provided.
Effect Of Chaos And Stochastics Induced By Internal Waves On Acoustic Wave Propagation, Tatiana A. Andreeva, William W. Durgin
Effect Of Chaos And Stochastics Induced By Internal Waves On Acoustic Wave Propagation, Tatiana A. Andreeva, William W. Durgin
Office of the Provost Scholarship
In the present paper the eikonal equation is considered in the form of a second order, nonlinear ordinary differential equation with harmonic excitation due to internal wave. The harmonic excitation is taken imperfect, i.e. there is a random phase modulation due to Gaussian white noise. The amplitude and wavelength of the acoustic wave are used as the principle signal characteristics in bifurcation analysis. The regions of instability, identified using the bifurcation diagrams, examined through phase diagrams and Poincare maps. The effect of stochastic nature in addition to chaotic one of internal waves is demonstrated by means of comparison of the …
Pnl Applied To Economics, Barbara Diaz, Tomohiro Takagi, Sema E. Alptekin
Pnl Applied To Economics, Barbara Diaz, Tomohiro Takagi, Sema E. Alptekin
Industrial and Manufacturing Engineering
This work is a continuation of Zadeh’s research on Precisiated Natural language. Precisiated Natural Language (PNL) provides a system for computation and deduction of propositions expressed in a natural language. The importance of PNL for economics is discussed. The improved process of PNL is presented using a real world example from economics.
Characterization Of Crack Propagation During Sonic Ir Inspection, Jacob Kephart, John Chen, Hong Zhang
Characterization Of Crack Propagation During Sonic Ir Inspection, Jacob Kephart, John Chen, Hong Zhang
Mechanical Engineering
Sonic IR is an emerging, thermal-based, nondestructive evaluation (NDE) technique. Typically a short burst of high power acoustical energy is injected into an object being studied and certain types of defects heat up and is detected using a thermal imaging camera. This inspection technique is very fast, lasting only a few seconds for total inspection time. However due to many uncertainties in the inspection process it has yet to be adopted widely by industry. There are many unknown parameters governing sonic IR, which need to be understood before it becomes a widely used NDE technique. This paper shows that under …
Application Of Nonlinear Dynamics Tools For Diagnosis Of Cracked Rotor Vibration Signatures, Jerzy T. Sawicki, Xi Wu, Andrew L. Gyekenyesi, George Y. Baaklini
Application Of Nonlinear Dynamics Tools For Diagnosis Of Cracked Rotor Vibration Signatures, Jerzy T. Sawicki, Xi Wu, Andrew L. Gyekenyesi, George Y. Baaklini
Mechanical Engineering
The nonlinear model of the cracked Jeffcott rotor is investigated, with the particular focus on study of rotor’s vibrational response using tools of nonlinear dynamics. The considered model accounts for nonlinear behavior of the crack and coupling between lateral and torsional modes of vibrations. Load torque is applied to the rotor which is laterally loadedwith a constant radial force (gravity force) and unbalance excitation. The co-existence of frequencies of lateral modes in the frequency spectra of torsional mode are characteristics of the coupling response of lateral and torsional vibrations. When only the lateral excitations are applied, vibration amplitude bifurcation plot …
Concepts Learning Using Technology For Rapid Feedback And Student Engagement, John Chen, Jennifer A. Kadlowec, Dexter C. Whittinghill
Concepts Learning Using Technology For Rapid Feedback And Student Engagement, John Chen, Jennifer A. Kadlowec, Dexter C. Whittinghill
Mechanical Engineering
In this project our goal is to improve student learning in the foundation mechanics course Statics. In this case improved learning is defined as knowledge retention (durability) and knowledge application in a different environment (transferability). We aim to do this by providing rapid feedback to students of their understanding of key concepts and skills being presented. The feedback system acts as the focal point and catalyst to encourage students to assist each other in correcting misconceptions or deepening each other’s understanding of the topic or skill at hand. Furthermore, the system allows the professor to assess the students’ level of …
Using Technology For Concepts Learning And Rapid Feedback In Statics, John Chen, Jennifer A. Kadlowec, Dexter C. Whittinghill
Using Technology For Concepts Learning And Rapid Feedback In Statics, John Chen, Jennifer A. Kadlowec, Dexter C. Whittinghill
Mechanical Engineering
In this project our goal is to improve student learning in the foundation mechanics course Statics as well as improve knowledge retention (durability) and knowledge application in a different environment (transferability). We aim to do this by providing rapid feedback to students of their understanding of key concepts and skills being presented. The feedback system acts as the focal point and catalyst to encourage students to assist each other in correcting misconceptions or deepening each other’s understanding of the topic or skill at hand. Furthermore, the system allows the professor to assess the students’ level of comprehension (or misconception) in …
Emerging From Engineering Education – Building A Remotely Operated Submarine, Hong Zhang, Bernard Pietrucha, John Chen
Emerging From Engineering Education – Building A Remotely Operated Submarine, Hong Zhang, Bernard Pietrucha, John Chen
Mechanical Engineering
In spring 2004, the Department of Mechanical Engineering of Rowan University offered a new course called “Emerging Topic – Designing and Building a Remotely Operated Vehicle (ROV)”. It is a project-based course where students are required to design, build and operate a submersible with provided materials. This course integrated many engineering aspects into one project and also exposed mechanical engineering students to Mechatronics. The course was welcomed by students and the response from them was quite positive.
Development Of A Flying Eye: A Project-Based Learning Experience, Sema E. Alptekin, Dianne Deturris, Daniel J. Macy, Jon E. Ervin
Development Of A Flying Eye: A Project-Based Learning Experience, Sema E. Alptekin, Dianne Deturris, Daniel J. Macy, Jon E. Ervin
Industrial and Manufacturing Engineering
The paper describes the design for manufacturability of a prototype product as part of a manufacturing engineering capstone course. The product chosen was a vertically launched unmanned aerial vehicle (UAV)—the “Flying Eye.” The Flying Eye is an autonomous parafoil surveillance platform quipped with sensors, controllers, mechanical components, and software. Once the autonomous UAV is deployed, it is designed to follow a predetermined flight path down to the ground. The design effort of the prototype device took place over a three-year period as a collaborative effort between the Aerospace Engineering and Industrial and Manufacturing Engineering departments at California Polytechnic State University. …
Lead-Free Solder Joint Reliability – State Of The Art And Perspectives, Jianbiao Pan, Jyhwen Wang, David M. Shaddock
Lead-Free Solder Joint Reliability – State Of The Art And Perspectives, Jianbiao Pan, Jyhwen Wang, David M. Shaddock
Industrial and Manufacturing Engineering
There is an increasing demand for replacing tin-lead (Sn/Pb) solders with lead-free solders in the electronics industry due to health and environmental concerns. The European Union recently passed a law to ban the use of lead in electronic products. The ban will go into effect in July of 2006. The Japanese electronics industry has worked to eliminate lead from consumer electronic products for several years. Although currently there are no specific regulations banning lead in electronics devices in the United States, many companies and consortiums are working on lead-free solder initiatives including Intel, Motorola, Agilent Technologies, General Electric, Boeing, NEMI …
Machine Vision Course For Manufacturing Engineering Undergraduate Students, Jose Macedo, Kurt Colvin, Daniel Waldorf
Machine Vision Course For Manufacturing Engineering Undergraduate Students, Jose Macedo, Kurt Colvin, Daniel Waldorf
Industrial and Manufacturing Engineering
A 10-week course was designed with funding from the Society of Manufacturing Engineers (SME) and input from industry representatives, to offer upper division engineering students a course on advanced automation. The objective was to provide engineering students theoretical and hands-on practical experience with automation technologies that will be of prime importance over the next decade: data acquisition and instrumentation, machine vision and motion control. This paper describes the machine vision portion of that class. It describes important concepts, hands-on equipment, and labs developed for this course, as well as examples of student projects from Spring Quarter, 2004. The course and …
The Limits Of Reflexive Design In A Secrecy-Based Organization, Michael W. Stebbins, Tali Freed, A.B. (Rami) Shani, Kenneth H. Doerr
The Limits Of Reflexive Design In A Secrecy-Based Organization, Michael W. Stebbins, Tali Freed, A.B. (Rami) Shani, Kenneth H. Doerr
Industrial and Manufacturing Engineering
No abstract provided.