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B-system: New solution for seamlessly interconnecting track-side and on-board systems over network

Hitachi Review 2005年第4期54卷 169-173页

作者： Koiwa, Hiroaki Ito, Satoru Matsuo, Masakazu Okura, Yoshinori Ishifuji, Tomoaki Ebata, Tomoichi System Solution Department Transportation System Division Industrial Systems Rolling Stock Electrical Systems Design Department Mito Transportation Systems Product Division Industrial Systems Transportation Control Systems Engineering Department Transportation Information Systems Division Information and Telecommunication Systems Systems Research Department Hitachi Research Laboratory Wireless Radio System Division Central Research Laboratory 4th Research Department Systems Development Laboratory

The fundamental concept of the ubiquitous information society is the ability to obtain needed information whenever and wherever one wants. In the context of enhanced railway passenger services, this means above all providing passengers with access to the network anytime and anywhere whether in railway stations or on-board trains. Equally important considering the greater intelligence of railcars themselves, is the need for more advanced on-board operating systems that are seamlessly connected to track-side systems. As a comprehensive rail system integrator, Hitachi has responded to these needs and at the same time contributed to more convenient and efficient rail systems through the development of a sophisticated broadband network system for trains - dubbed the B-system - that not only significantly increases the capacity of on-board networks but also supports seamless continuous interconnection between on-board and track-side systems.

关键词： Railroad transportation

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Recent train traffic management systems for public and private railways

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Hitachi Review 2004年第1期53卷 30-34页

作者： Massaki, Takashi Sakuma, Hiroya Nishijima, Eiji Signaling System Design Department Mito Transp. Syst. Product Division Power and Industrial Systems 1st Research Department Systems Development Laboratory

Train traffic management systems provide a centralized means for the management of train traffic. The increased density of traffic on major routes and the diversification of passengers' needs have resulted in increased demand for such systems in the rail transportation business. To meet the needs of both public and private railway operators, Hitachi, Ltd.'s train traffic management systems have the ability to evolve from systems the transport management of a single line into integrated operation systems for multiple lines, and even total railway systems that tie in with other systems for the management of electric power management and other facilities. In recent years, railway operators have taken the opportunity to establish integrated operation centers when updating existing train traffic management systems or when building new routes, and a growing number of railway operators are building integrated operation systems to comprehensively manage the train traffic on multiple routes. As a result, these integrated operation systems have evolved into integrated traffic management systems that manage the traffic on multiple lines or entire networks. In the future, Hitachi aims to strengthen the links between passenger information service systems and train operation schedule systems, and to construct a system that operates and manages entire rail systems more efficiently.

关键词： Railroads

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Nonlinear investigation of the effect of primary suspension on the hunting stability of a rail wheelset

Nonlinear investigation of the effect of primary suspension ...

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ASME/IEEE Joint Conference on Rail

作者： A. Mohan M. Ahmadian Product Design and Development Nuclear Fuel Framatome ANP Lynchburg VA USA Advanced Vehicle Dynamics Laboratory Department of Mechanical Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA

The mathematical model of a single railway wheelset moving with constant speed on a smooth, level, and tangential track is used to numerically investigate the nonlinear dynamics of the wheelset. Nonlinearities in the wheelset model include the nonlinear wheel-rail profile and the friction-creep characteristics of the wheel-rail contact geometry. Wheelset numerical simulations consider single-point and two-point wheel-rail contact scenarios. Sensitivity of the critical hunting velocity to primary stiffness and damping parameters is examined. Results of the lateral stability study indicate that the critical hunting velocity of the wheelset is most sensitive to the primary longitudinal and lateral stiffness. Methods involving semi-active and active control of the primary longitudinal stiffness are developed to raise the critical velocity of hunting. These approaches are seen to considerably increase the wheelset critical hunting velocity.

关键词： Stability Damping Vehicle dynamics Wheels Geometry Creep Rail transportation Flanges product design Nuclear fuels

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Advanced signaling systems based on transmission technology for high-density traffic

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Hitachi Review 2001年第4期50卷 149-153页

作者： Matsumoto, Masayuki Kon, Yoshinori Yokosuka, Yasushi Amiya, Noriharu Nagatsugu, Yoshihide Sasaki, Eiji Transport Department East Japan Railway Company Adv. Rlwy. System Development Center JR East Group Japan Railway Company Hitachi Ltd. 2nd Department of Systems Research Hitachi Research Laboratory Hitachi Ltd. Signaling Systems Design Department Mito Transp. Syst. Product Division Hitachi Ltd. Rolling Stock Elec. Syst. Des. Dept. Mito Transp. System Product Division Hitachi Ltd. Signaling/Pwr. Supp. Syst. Eng. D. Transportation Systems Division

We have developed signaling systems to increase the transportation capacity and ease rush-hour traffic in metropolitan areas. This is achieved by using an on-board controller that generates a parabolic braking pattern according to the limit of movement authority (LMA) transmitted from digital field controllers. One system is called "the digital ATC*1 " (D-ATC) and it is now being tested for commercial operation. The field controllers calculate the LMA by using a track circuit unit and transmit digital signals to track circuits. The on-board controller generates a parabolic braking pattern according to the LMA and recognizes its own location. The other system, ATACS*2, is a radio-communication-based signaling system that makes full use of radio communication technologies. An on-board controller in this system recognizes the location of trains without using track circuits. Field controllers track the location of trains and calculate the LMA based on the train location obtained through radio transmission. The on-board controller generates a brake pattern according to the LMA received from the field controllers. This system enables moving-block signaling for high-density traffic control. We are planning to develop advanced signaling systems based on these systems.

关键词： Railroad traffic control

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Study on the determioration of an epoxy-type adhesive containing nitrile rubber

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分析化学 2000年第11期49卷 835-841页

作者： Tetsuya Kawashima Toshihiko Sugimoto Toshio Ogawa Kameyama branch， Nitto Analytical Techno Center Co.， Ltd.， 919， Fuke， Kameyama-shi， Mie 519-0193 Product Development Dept.， Printed Circuit Div.， Electric Electronic Business Sector Nitto Denko Co.， LTD. 919， Fuke， Kameyama-shi， MIe 519-0193 Laboratory for Material Design Engineering， Kanazawa Institute of Technology， 7-1， Ohgigaoka， Nonoichimachi， Ishikawa 921-8501

The mechanism of the deterioration process of an adhesive composed of nitrile rubber(UBR) and epoxy resin is discussed based on the techniques of differential scanning calorimetry (DSC), transmission electron microsco... 详细信息

关键词： transmission electronmicroscope ft-ir adhesive nitrile rubber deterioration

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Assessing value for product family design and selection

Assessing value for product family design and selection

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ASME 1999 design Engineering Technical Conferences, DETC 1999

作者： Gonzalez-Zugasti, Javier P. Otto, Kevin N. Baker, John D. Engineering Design Research Laboratory Center for Innovation in Product Development Massachusetts Institute of Technology CambridgeMA02139 United States Mission and Systems Architecture Division Jet Propulsion Laboratory California Institute of Technology PasadenaCA91109 United States

ISBN: (纸本)9780791819715

A platform is the set of elements and interfaces that are common to a family of products. We have previously presented a method for designing product families based on platforms that quantifies performance and cost metrics. That approach allows a team of engineers to design and evaluate candidate platforms, given perfect understanding of the designs and requirements. In this paper we present a model to account for uncertainty present during the development of those product families. Real options concepts are introduced to model the risks and delayed decision benefits present under uncertainty,in technologies, funding, etc. We develop a quantitative measure of the value to the company for different family designs, and apply it to select the most appropriate design from the possible alternatives. An application to the design of platform-based families of spacecraft is shown. Results from the models indicated the platforrns that were most valuable to the company under different scenarios, as well as the sensitivity of the value of each design to different uncertainty factors. Copyright © 1999 by ASME.

关键词： product design

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Application of high temperature superconducting wire to magnetostrictive transducers for underwater sonar

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NAVAL ENGINEERS JOURNAL 1997年第1期109卷 31-39页

作者： Joshi, CH Lindberg, JF Clark, AE Dr. Chad H. Joshi:is president of Energen Incorporated an engineering and development firm specializing in cryogenic and electromechanical systems. The research presented here was conducted while he was employed at American Superconductor Coporation where he held both technical and program management positions. While there Dr. Joshi managed the development of several demonstration products including the sonar transducer presented here. He holds M.S. and Sc.D. degreesfrom the Massachusetts Institute of Technology and a B.S. degree from the Worcester Polytechnic Institute. He has worked in several diverse fields including solar energy fluidized bed technology and superconductivity. His work on stochastic analysis of solar insolation was recognized by the ASME and his doctoral research was accorded international recognition for its unique contribution to understanding quenching in superconducting magnets. Dr. Joshi has numerous patents and more than thirty-five technical publications to his credit. He is a registered Professional Engineer in Massachusetts and an active member of ASME and IEEE. He is a co-founder and treasurer of the New England Chapter of the Cryogenics Society of America. He will be listed in Whos Who in the East in 1997. Jan Lindberg:is a physicist in the Transducers and Arrays Division of the Naval Undersea Warfare Center in New London Connecticut. He leads NUWC'S exploratory development efforts for transduction science and currently is spearheading an effort to introduce high-energy density active materials into tactical sonar systems. With the discovery of high temperature superconductivity he saw the potential benefit of integrating several emerging technologies and enticed American Superconductor Corp. to develop a high temperature superconducting transducer which resulted in the March 1993 demonstration of the world's first integrated high temperature superconducting device. Mr. Lindberg's current interests involve design of high power ultrasonic copolymer arrays characterization of

A low-frequency underwater acoustic transducer integrating high-temperature superconducting (HTS) coils and terbium-dysprosium (TbDy) magnetostrictive material was designed, fabricated and tested. This represents a novel application for high-temperature superconductivity and is a first example of an integrated system involving HTS coils cooled by a mechanical cryocooler. It also brings HTS technology together with a novel magnetic materials technology. The I-ITS coils were fabricated using react-and-wind BiSrCaCuO-2223 HTS wires. They produce a peak field of 0.1 Tesla at 50 K. A single-stage, Stirling-cycle cryocooler was used to cool the coils and the TbDy driver to cryogenic temperatures (50-65K). The coils provide an AC magnetic field superimposed on a DC bias field, which produces oscillatory strain within the magnetostrictive rod;this motion is transmitted through a cryostat to two head masses which project sound into the surrounding environment. High power acoustic output can be obtained by operating the transducer at its resonance frequencies of 520 Hz in air and 430 Hz underwater. This development demonstrates that, unlike low temperature superconductors, HTS wires can be considered for AC applications due to the low losses in these superconductors and the higher heat capacities of materials at temperatures above liquid helium.

关键词： Underwater equipment

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Operational systems, logistics engineering and technology insertion

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NAVAL ENGINEERS JOURNAL 1997年第3期109卷 205-220页

作者： Grubb, MJ Skolnick, A Michael J. Grubb:has perfomzed naval engineering at the Crane Division Naval Surface Warfare Center (NSWC) for more than twenty-five years. He currently the program manager for the Sustainable Hardware and Affordable Readiness Practice Program (SHARP). is a Navy-wide logistics research and development prgram aimed at the successful transiton of proved technologies inot the fleet. SHARP focuses on reducing acquisition performance capability reliability maintainability and readiness of these systems. Mr. Grubb has served as a department director for the past eleven years. His most recent assignment was as director of the Tactical Computer Resources and Test Equipment Department. This organization provided acquisition and in-service engineering support of the Navy's tectical embedded computers priphirals displays and mass memory storage devices. The organization also provided a complete range of product engineering and metrology engineerig services for SSP NevSeaSysCom and the Trident Program. Prior to this appointment Mr. Grubb was deptuy director psysical security programs department and site responsible for program management and system integration of ashore integrated security systems. Mr. Grubb holds a B.S. degree in industrial engineering from Iowa State Universtiy an M.S. degree in industrial engineering from Purdue University and has copleted the course work (Dec.'96 for a master's degree in public and environment affairs at Indiana University-Purdue Univeristy Indianapolis. Dr. Alfred Skolnick operates System Science Consultants (SSC) specilizing in strategic planning technical program definiton technology assessment and engineering analyses on selected matters of national interest. He has taught physics mathematics and management sciences at University of Virginia and Marymount University and is currently adjunct professor of mathematics at Northern Virginia Community College. Form 1985 to 1989 he was president of the American Society of Noval Engineers. Dr. Skolnick served at Applied Physic

In an era of fiscal austerity, downsizing and unforgiving pressure upon human and economic capital, it is an Augean task to identify resources for fresh and creative work. The realities of the day and the practical demands of more immediate fleet needs can often dictate higher priorities. Yet, the Navy must avoid eating its seed corn. Exercising both technical insight and management foresight, the fleet, the R&D community, the Office of the Chief of Naval Operations (OpNav) and the product engineering expertise of the Naval Surface Warfare Center (NSWC) are joined and underway with integrated efforts to marry new, fully demonstrated technologies and operational urgencies. Defense funding today cannot sponsor all work that can be mission-justified over the long term because budgets are insufficient to support product maturation within the classical development cycle. However, by rigorous technical filtering and astute engineering of both marketplace capabilities and currently available components, it is possible in a few select cases to compress and, in effect, integrate advanced development (6.3), engineering development (6.4), weapon procurement (WPN), ship construction (SCN), operation and maintenance (O&M,N) budgetary categories when fleet criticalities and technology opportunities can happily meet. In short, 6.3 funds can be applied directly to ''ripe gateways'' so modern technology is inserted into existing troubled or aging systems, sidestepping the lengthy, traditional development cycle and accelerating practical payoffs to recurrent fleet problems. To produce such constructive results has required a remarkable convergence of sponsor prescience and engineering workforce excellence. The paper describes, extensively, the philosophy of approach, transition strategy, polling of fleet needs, technology assessment, and management team requirements. The process for culling and selecting specific candidate tasks for SHARP sponsorship (matching operational need with t

关键词： Naval vessels

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Reusability – the key to corporate agility: its integration with enhanced quality function deployment

World Class Design to Manufacture

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World Class design to Manufacture 1995年第1期2卷

作者： Jérôme Witter Don Clausing Ludger Laufenberg Ronaldo Soares de Andrade Based at Essem GmbH Mars Inc. Germany. He is Bernard M. Gordon Adjunct Professor of Engineering Innovation and Practice at the MIT Cambridge MA. Chief Engineer in the Laboratory for Machine Tools and Production Engineering at the Technical University of Aachen Germany. Professor of Product Design and Quality Development at the School of Engineering Federal University UFJR Rio de Janeiro Brazil and is currently a Visiting Professor at the MIT Cambridge Massachusetts USA.

Market presence, quality and costs are primarily decided duringproduct development – improved in the last 15 years by theimplementation of basic concurrent engineering and now further extendedby enhanced quality function deployment (EQFD). Another key improvementis extended reusability, which enables greater product variety, whilestaying higher on learning curves. Reusability is best planned andmanaged by using a reusability matrix which is responsive to the voicesof the customers and fully integrated into the total developmentprocess. Outlines the integration of the reusability planning and therequired interface management into EQFD, and thus the integration intototal quality development.

关键词： Concurrent engineering product development Quality function deployment

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Calculation of the temperature distribution in an asynchronous machine

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European Transactions on Electrical Power 1995年第3期5卷 181-186页

作者： Xypteras, J. Maras, K. Spyrelis, D. Associate Professor Dr.-Ing. Jannis Xypteras (1937) Director of the Electrical Machines Laboratory Dept. of Electrical Engineering Aristotle University of Thessaloniki (AUT)/Greece graduated from the Fakultatfur Elektrotechnik of the RWTH AachedGermany. During the years 1965 to 1980 he had been employed in German and Greek factories for electrical machines several years as chief of development departments. In 1978 he obtained his Dr. Electr. Eng. degree in the AUT. His subject was in the area of eddy currents. Since 1984 he is Ass. hofessor in the same University. His special interests: Design and development of electrical machines vibration and noise problems electromagnetic fields eddy currents. (Dept. of Electrical Engineering Aristotle University GR-54006 Thessaloniki/Greece T +30 3 1 I99 62 93 Fax +303 11 99 63 02) Kostas Maras (1966) received his degree in Electrical Engineering from the Electrotechnical Faculty of Aristotle University of Thessaloniki/Greece in 1989. In 1990 he graduated as M.Sc. in Digital Electronics in the King's College London at the University of LondordGB with the project “Design of a Transversal Filter on VLSI CMOS”. Since then he has been working at M. Papasavas S.A. at KallithedGreece as an analyst in developing industrial software. Projects: Design and implementation of a dynamic relational model used to tackle production problems in industry. From 1991 to 93 he was responsible for the development of production planning used in industries. (M. Papasavas S.A. Sofocleus 261 GR-17874 KallithedGreece T +30 119423246 Fax +30 1/9429561) Dimitrios S. Spyrelis (1965) received his Diploma in Electrical Engineering from the University of Thessalonikil Greece in 1989. In 1990 he joined the Coding Center of Greek Army as research Assistant. He is currently working as technical director in a pigpoultry breeding company which includes feed processing industry slaughter houses by product process industry wastes treatment systems from farm livestock. His last fields of interest

In this paper the temperature distribution on the section vertical to the axis of an asynchronous machine is calculated. For the calculation the numerical method of “Control Volumes” has been used. The technique used can be easily modified to fit any kind of machine. It can also analyse transients. Copyright © 1995 John Wiley & Sons, Ltd.

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