Mechanical Engineering Magazine Advisory Board Harry Armen; Leroy S
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The University of Texas at Austin
The University of Texas at Austin Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Eraser Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Transitioning EM Railgun Technology to the Warfighter Dr. Harry D. Fair, Director Institute for Advanced Technology The University of Texas at Austin The Governator is correct! • At the IAT, we are harnessing large quantities of electric energy to enable radically new capabilities for the warfighter. • These new electric weapons are capable of accelerating high energy hypervelocity projectiles Electric guns are real. from electric railguns on land, sea, and air platforms, and are capable of protecting these platforms by electromagnetic protection systems. Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Hypervelocity Electromagnetic Railguns What are they? How do they work? Why change to electromagnetic energy? How can we use them? When can we have them? What are the implications for the Army and the Navy? Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 What is an Electromagnetic Railgun? Converts Electricity to Kinetic Energy The barrel can have any cross section - round, The accelerating Force square, rectangular is provided by Electromagnetic Forces and can accelerate projectiles to very high velocities Force Muzzle view We routinely launch projectiles to hypervelocities -
THE IEEE REGION TEN NEWSLETTER December 2012 Editor: Zia Ahmed
THE IEEE REGION TEN NEWSLETTER December 2012 Editor: Zia Ahmed R10 Director’s Message In this Issue....... The last quarter has been an eventful one ranging from the devastating Hurricane R10 Director’s Message Sandy rampaging through the US north- IEEE Elections 2012 Results east to a number of activities within the IEEE R10 News & Highlights region and beyond. First, we would like to • R10 Delegate/Director 2013 - 2014 lend our support and encouragement to our • 2012 R10 Outstanding Volunteer Award members, staff and volunteers who have • 2012 R10 WIE Volunteer Award been severely affected by Hurricane Sandy. Indeed, the scale of destruction and adversity of Sandy caused much • 2012 - MMI & MIMI Awards hardships in lost homes, and significant inconveniences • Recipients of 2012 MGA Awards from Region 10 from loss of electrical power to flooded neighbourhoods. • Editorial We extend our prayers and support to those affected and • Brief Reports on R10 Activities in 2012 that there will quick recover to normalcy. • South East Asia Conference Organisers Leadership Among the highlights of the past few months are: Workshop • The winners of the IEEEXtreme 6.0 results were • Tributes to R10 Director 2011-2012 announced on 20 November with the top winner being IEEE HQ News & Highlights Team DongskarPedongi (Institut Teknologi Bandung, • IEEE Fellows Elevated in R10 as of January 2013 Indonesia). Three other teams from Region 10 were in the IEEE R10 Councils & Sections - News & Highlights top 10, including Team Meeyo (University of Moratuwa, IEEE Kolkata Section SL) in 3rd place, Team Engineer3 (University of • Auckland, NZ) in 8th position and Team Selachimorpha • IEEE Western Australia Section (University of Moratuwa, SL) in 9th position. -
Pulsed Rotating Machine Power Supplies for Electric Combat Vehicles
Pulsed Rotating Machine Power Supplies for Electric Combat Vehicles W.A. Walls and M. Driga Department of Electrical and Computer Engineering The University of Texas at Austin Austin, Texas 78712 Abstract than not, these test machines were merely modified gener- ators fitted with damper bars to lower impedance suffi- As technology for hybrid-electric propulsion, electric ciently to allow brief high current pulses needed for the weapons and defensive systems are developed for future experiment at hand. The late 1970's brought continuing electric combat vehicles, pulsed rotating electric machine research in fusion power, renewed interest in electromag- technologies can be adapted and evolved to provide the netic guns and other pulsed power users in the high power, maximum benefit to these new systems. A key advantage of intermittent duty regime. Likewise, flywheels have been rotating machines is the ability to design for combined used to store kinetic energy for many applications over the requirements of energy storage and pulsed power. An addi - years. In some cases (like utility generators providing tran- tional advantage is the ease with which these machines can sient fault ride-through capability), the functions of energy be optimized to service multiple loads. storage and power generation have been combined. Continuous duty alternators can be optimized to provide Development of specialized machines that were optimized prime power energy conversion from the vehicle engine. for this type of pulsed duty was needed. In 1977, the laser This paper, however, will focus on pulsed machines that are fusion community began looking for an alternative power best suited for intermittent and pulsed loads requiring source to capacitor banks for driving laser flashlamps. -
Arxiv:1701.07063V2 [Physics.Ins-Det] 23 Mar 2017 ACCEPTED by IEEE TRANSACTIONS on PLASMA SCIENCE, MARCH 2017 1
This work has been accepted for publication by IEEE Transactions on Plasma Science. The published version of the paper will be available online at http://ieeexplore.ieee.org. It can be accessed by using the following Digital Object Identifier: 10.1109/TPS.2017.2686648. c 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, including reprinting/republishing this material for advertising or promotional purposes, collecting new collected works for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. arXiv:1701.07063v2 [physics.ins-det] 23 Mar 2017 ACCEPTED BY IEEE TRANSACTIONS ON PLASMA SCIENCE, MARCH 2017 1 Review of Inductive Pulsed Power Generators for Railguns Oliver Liebfried Abstract—This literature review addresses inductive pulsed the inductor. Therefore, a coil can be regarded as a pressure power generators and their major components. Different induc- vessel with the magnetic field B as a pressurized medium. tive storage designs like solenoids, toroids and force-balanced The corresponding pressure p is related by p = 1 B2 to the coils are briefly presented and their advantages and disadvan- 2µ tages are mentioned. Special emphasis is given to inductive circuit magnetic field B with the permeability µ. The energy density topologies which have been investigated in railgun research such of the inductor is directly linked to the magnetic field and as the XRAM, meat grinder or pulse transformer topologies. One therefore, its maximum depends on the tensile strength of the section deals with opening switches as they are indispensable for windings and the mechanical support. -
Design and Optimization of an Electromagnetic Railgun
Michigan Technological University Digital Commons @ Michigan Tech Dissertations, Master's Theses and Master's Reports 2018 DESIGN AND OPTIMIZATION OF AN ELECTROMAGNETIC RAILGUN Nihar S. Brahmbhatt Michigan Technological University, [email protected] Copyright 2018 Nihar S. Brahmbhatt Recommended Citation Brahmbhatt, Nihar S., "DESIGN AND OPTIMIZATION OF AN ELECTROMAGNETIC RAILGUN", Open Access Master's Report, Michigan Technological University, 2018. https://doi.org/10.37099/mtu.dc.etdr/651 Follow this and additional works at: https://digitalcommons.mtu.edu/etdr Part of the Controls and Control Theory Commons DESIGN AND OPTIMIZATION OF AN ELECTROMAGNETIC RAIL GUN By Nihar S. Brahmbhatt A REPORT Submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE In Electrical Engineering MICHIGAN TECHNOLOGICAL UNIVERSITY 2018 © 2018 Nihar S. Brahmbhatt This report has been approved in partial fulfillment of the requirements for the Degree of MASTER OF SCIENCE in Electrical Engineering. Department of Electrical and Computer Engineering Report Advisor: Dr. Wayne W. Weaver Committee Member: Dr. John Pakkala Committee Member: Dr. Sumit Paudyal Department Chair: Dr. Daniel R. Fuhrmann Table of Contents Abstract ........................................................................................................................... 7 Acknowledgments........................................................................................................... 8 List of Figures ................................................................................................................ -
Improvement of Electromagnetic Railgun Barrel Performance and Lifetime By
IMPROVEMENT OF ELECTROMAGNETIC RAILGUN BARREL PERFORMANCE AND LIFETIME BY METHOD OF INTERFACES AND AUGMENTED PROJECTILES A Thesis Presented to the Faculty of California Polytechnic State University San Luis Obispo In Partial Fulfillment of the Requirements for the Degree Master of Science in Aerospace Engineering by Aleksey Pavlov June 2013 c 2013 Aleksey Pavlov ALL RIGHTS RESERVED ii COMMITTEE MEMBERSHIP TITLE: Improvement of Electromagnetic Rail- gun Barrel Performance and Lifetime by Method of Interfaces and Augmented Pro- jectiles AUTHOR: Aleksey Pavlov DATE SUBMITTED: June 2013 COMMITTEE CHAIR: Kira Abercromby, Ph.D., Associate Professor, Aerospace Engineering COMMITTEE MEMBER: Eric Mehiel, Ph.D., Associate Professor, Aerospace Engineering COMMITTEE MEMBER: Vladimir Prodanov, Ph.D., Assistant Professor, Electrical Engineering COMMITTEE MEMBER: Thomas Guttierez, Ph.D., Associate Professor, Physics iii Abstract Improvement of Electromagnetic Railgun Barrel Performance and Lifetime by Method of Interfaces and Augmented Projectiles Aleksey Pavlov Several methods of increasing railgun barrel performance and lifetime are investigated. These include two different barrel-projectile interface coatings: a solid graphite coating and a liquid eutectic indium-gallium alloy coating. These coatings are characterized and their usability in a railgun application is evaluated. A new type of projectile, in which the electrical conductivity varies as a function of position in order to condition current flow, is proposed and simulated with FEA software. The graphite coating was found to measurably reduce the forces of friction inside the bore but was so thin that it did not improve contact. The added contact resistance of the graphite was measured and gauged to not be problematic on larger scale railguns. The liquid metal was found to greatly improve contact and not introduce extra resistance but its hazardous nature and tremendous cost detracted from its usability. -
31295005665780.Pdf
DESIGN AND CONSTRUCTION OF A THREE HUNDRED kA BREECH SIMULATION RAILGUN by BRETT D. SMITH, B.S. in M.E. A THESIS IN -ELECTRICAL ENGINEERING Submitted to the Graduate Faculty of Texas Tech University in Partial Fulfillment of the Requirements for the Degree of MASTER OF SCIENCE IN ELECTRICAL ENGINEERING Jtpproved Accepted December, 1989 ACKNOWLEDGMENTS I would like to thank Dr. Magne Kristiansen for serving as the advisor for my grad uate work as well as serving as chairman of my thesis committee. I am also appreciative of the excellent working environment provided by Dr. Kristiansen at the laboratory. I would also like to thank my other two thesis committee members, Dr. Lynn Hatfield and Dr. Edgar O'Hair, for their advice on this thesis. I would like to thank Greg Engel for his help and advice in the design and construc tion of the experiment. I am grateful to Lonnie Stephenson for his advice and hard work in the construction of the experiment. I would also like to thank Danny Garcia, Mark Crawford, Ellis Loree, Diana Loree, and Dan Reynolds for their help in various aspects of this work. I owe my deepest appreciation to my parents for their constant support and encour agement. The engineering advice obtained from my father proved to be invaluable. 11 CONTENTS .. ACKNOWLEDGMENTS 11 ABSTRACT lV LIST OF FIGURES v CHAPTER I. INTRODUCTION 1 II. THEORY OF RAILGUN OPERATION 4 III. DESIGN AND CONSTRUCTION OF MAX II 27 Railgun System Design 28 Electrical Design and Construction 42 Mechanical Design and Construction 59 Diagnostics Design and Construction 75 IV. -
Rehabilitation Technologies: Biomechatronics Point of View
1 Rehabilitation Technologies: Biomechatronics Point of View Erhan Akdoğan and M. Hakan Demir Yıldız Technical University Turkey 1. Introduction Rehabilitation aims to bring back the patient’s physical, sensory, and mental capabilities that were lost due to injury, illness, and disease, and to support the patient to compensate for deficits that cannot be treated medically (http://www.ehendrick.org/healthy, June 2010). After the Spinal Cord Injury (SCI), stroke, muscle disorder, and surgical operation such as knee artroplasticy, patients need rehabilitation to recover their movement capability (mobilization) (Bradly et al., 2000; Inal, 2000; Metrailler et al., 2007; Okada et al., 2000; Reinkensmeyer, 2003 and http://www.manchesterneurophysio.co.uk, November 2010). The number of those who need rehabilitation is steadily increasing everyday. Parallel to this, equipment and techniques used in the field of rehabilitation are becoming more advanced and sophisticated. On the other hand, mechatronics, an interdisciplinary science, is a combination of machinery, electric-electronics and computer sciences plays an important role in rehabilitation technologies. In particular mechatronics systems provide important benefits for movements that are related to physical exercises in rehabilitation process. Biomechatronics is a sub-discipline of mechatronics. It is related to develop mechatronics systems which assist or restore to human body. A biomechatronic system has four units: Biosensors, Mechanical Sensors, Controller, and Actuator. Biosensors detect intentions of human using biological reactions coming from nervous or muscle system. The controller acts as a translator between biological and electronic systems, and also monitors the movements of the biomechatronic device. Mechanical sensors measure information about the biomechatronic device and relay to the biosensor or controller. -
Engineers Are No Strangers to the Challenges of Bringing Effective Processes and Basic Infrastructure to Remote Communities
FREEDOM ENGINEERINGAND Downloaded from http://asmedigitalcollection.asme.org/memagazineselect/article-pdf/134/09/32/6358244/me-2012-sep1.pdf by guest on 26 September 2021 fOR ALL I N THe ngineers are no strangers to the DeVeLOPeD AND challenges of bringing effective DeVeLOPING processes and basic infrastructure wORLDS, E to remote communities and marginalized TeCHNOLOGY IS populations. Engineers often operate beyond beCOmING the borders of their own communities, A bASIC HUmAN cultures, and languages to bring change and RIGHT. assist in the development of sustainable and BY JeSSICA M. WYNDHAm resilient societies around the globe. Most engineers understand the potential impact of their work on people and the environment, and most are familiar as well with the ethics and regulations relevant to their jobs. Many engineers are less familiar, however, Jessica M. Wyndham is associate director of the Scientific Responsibility, with another set of ideas of direct relevance to Human Rights, and Law Program of the American Association for the their profession: international standards for Advancement of Science. human rights. Human rights include what 32 MECHANICAL ENGINEERING | September 2012 HumanRights3.indd 32 8/3/12 3:51 PM Downloaded from http://asmedigitalcollection.asme.org/memagazineselect/article-pdf/134/09/32/6358244/me-2012-sep1.pdf by guest on 26 September 2021 HumanRights3.indd 33 8/3/12 3:51 PM are traditionally known as civil liberties—the right to vote, international and regional treaty law, according to which freedom of expression, the right to a fair trial—but they governments voluntarily assume obligations for which they extend farther, including the realm of technology and its can be held accountable. -
Compulsator Design for Electromagnetic Railgun System
COMPULSATOR DESIGN FOR ELECTROMAGNETIC RAILGUN SYSTEM By Bryan Bennett Senior Project Electrical Engineering Department Cal Poly State University, San Luis Obispo June, 2012 ABSTRACT This project designed, fabricated, and partially tested a compensated pulsed alternator (compulsator) to power an electromagnetic rail gun (EMRG) in a multidisciplinary team. The EMRG team includes two master’s AERO students, two senior EE students, and three senior ME students. Design of the compulsator began with research through conference and research papers. This design was changed throughout the project as system analysis and component testing exposed unforeseen system limitations. While original specifications were not met, all fabricated components but one, the stator, were completed using Cal Poly’s facilities and the project’s limited available budget. Experimental verification of calculations and system modeling were not obtained because the compulsator was fully assembled at the time of this writing, but the necessary measurements and testing procedures have been outlined. i TABLE OF CONTENTS Abstract……………………………………………………………………………………………i Table of Contents…………………………………………………………………………………ii List of Figures…………………………………………………………………………………….iii List of Tables……………………………………………………………………………………..iv Acknowledgements……………………………………………………………………………….v Introduction……………………………………………………………………………………….1 Background………………………………………………………………………………………..3 Requirements……………………………………………………………………………………...6 Design……………………………………………………………………………………..………7 Total System Design……………………………………………………………...……….7 -
Design Optimization and Experimental Verification of Permanent Magnet Synchronous Motor Used in Electric Compressors in Electric
applied sciences Article Design Optimization and Experimental Verification of Permanent Magnet Synchronous Motor Used in Electric Compressors in Electric Vehicles Soo-Whang Baek 1 and Sang Wook Lee 2,* 1 Department of Automotive Engineering, Honam University, 417 Eodeung-daero, Gwangsan-gu, Gwangju 62399, Korea; [email protected] 2 Department of Mechanical Design Engineering, Wonkwang University, 460 Iksan-daero, Iksan-si, Jeollabuk-do 54538, Korea * Correspondence: [email protected]; Tel.: +82-63-850-6968 Received: 9 April 2020; Accepted: 3 May 2020; Published: 6 May 2020 Featured Application: Optimal design of permanent magnet synchronous motors (PMSMs) used in electric compressors in electric vehicles. Based on the proposed optimization method, the efficiency and cogging torque characteristics of the PMSM can be improved. Abstract: In this study, a shape design optimization method is proposed to improve the efficiency of a 3 kW permanent magnet synchronous motor (PMSM) used in an electric compressor intended for use in an electric vehicle. The proposed method improves the efficiency performance of the electric compressor by improving the torque characteristics of the initial PMSM model. The dimensions of the rotor were set as the design variables and were chosen to maximize efficiency and reduce cogging torque. During the determination of the design points with conventional Latin hypercube design, the experimental points may be closely related to each other. Therefore, the optimal Latin hypercube design was used to optimally distribute the experimental points evenly and improve the space filling characteristics. The Kriging model was used as an interpolation model to predict the optimal values of the design variables. -
2020 ASME Annual Report
Annual Report FY2020 The American Society of Mechanical Engineers® ® ASME® The American Society of Mechanical Engineers Our Mission ASME’s mission is to advance engineering for the benefit of humanity. Our Vision ASME’s vision is to be the premier resource for the engineering community globally. Our Values In performing its mission, ASME adheres to these core values: • Embrace integrity and ethical conduct • Embrace diversity and respect the dignity and culture of all people • Nurture and treasure the environment and our natural and man-made resources • Facilitate the development, dissemination, and application of engineering knowledge • Promote the benefits of continuing education and of engineering education • Respect and document engineering history while continually Table of embracing change Contents • Promote the technical and societal contribution of engineers Our Credo ASME Annual Report Pg. 4 Setting the Standard… ASME Foundation Pg. 8 • In Engineering Excellence Financials Pg. 24 • In Knowledge, Community, and Advocacy • For the benefit of humanity 1880 Year ASME was Established 100,000+ ASME Members 28,000+ ASME Student Members 20,000+ ASME Early Career Engineer Members 140+ Countries with ASME Members 3,800+ Active Volunteer Leaders 560+ ASME Standards 100+ Countries using the ASME Boiler & Pressure Vessel Code 2 asme.org asme.org 3 Virtual Industry Events Governors formally declared that ASME Diversity & & Conferences Inclusion efforts – to encourage, support, and Letter from the celebrate the diverse voices of our employees, As mentioned, ASME’s renowned Industry Events volunteers, customers, and communities – are of and Conferences programming shifted from the paramount importance to the Society as a whole. In President physical world to virtual.