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A dISTRIBUTEd MEdIA ACCESS PROTOCOL FOR PACKET RAdIO NETWORKS ANd PERFORMANCE ANALYSIS .2. NETWORK SET-UP TIME ANd dATA RATE

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INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS 1995年第1期8卷 49-63页

作者： PONd, LC LI, VOK Communication Sciences Electrical Engineering Systems University of Southern California Los Angeles CA 90089-2565 U.S.A. Lawrence C. Pond received the M.Sc. and Ph.D. degrees in electrical engineering from the University of Southern California in 1983 and 1990 respectively. Dr. Pond is currently a scientist at Hughes Space and Communications Company having joined in 1980. He has worked in the fields of communication system design mobile communication network and spacecraft payload design. He is currently working on the development of satellite-based ATM transport and switching architectures for BISDN and Defense Information System Network amlications. Dr. Pond is a member of IEEE. Victor O. K. Li was born in Hong Kong in 1954. He received his SB SM and Sc.D. degrees in Electrical Engineering and Computer Science from the Massachusetts Institute of Technology Cambridge Massachusetts in 1977 1979 and 1981 respectively. Since February 1981 he has been with the University of Southern California (USC) LOS Angeles California where he is Professor of Electrical Engineering and Director of the USC Communication Sciences Institute. He has published 150 technical papers and has lectured and consulted extensively around the world. His research interests include high-speed communication networks personal communication networks intelligent networks distributed databases queueing theory graph theory and applied probability. Dr. Li is very active in the Institute of Electrical and Electronic Engineers (IEEE) having been a member of the Computer Communications Technical Committee since 1983 and having served as Chairman from 1987–1989. He served as Chairman of the Los Angeles Chapter of the IEEE Information Theory Group from 1983–1985. He is the Steering Committee Chair of the International Conference on Computer Communications and Networks (IC3 N) General Chair of the 1st Annual IC3N held in San Diego California in June 1992 General Chair and Technical Program Chair of the 4th IEEE Workshop on Comp

In this, the second part of a two-part paper, the required time for establishing a mobile packet radio network using the virtual circuit and time division multiple access protocol developed in Part 1 is analysed. Tools are developed to determine the virtual circuit and network set-up times in terms of the channel bandwidth allocated to establish and maintain the network. The tools are then extended to include the effects of user mobility. Then these results are combined with the network capacity results of Part 1 to analyse the trade-off between the data rate and set-up time of the network. Next a hierarchical architecture is proposed and the network data rate versus set-up time trade-off of this architecture is analysed using these tools. This architecture is shown to both provide a higher data rate and establish faster than flat networks of the same number of nodes.

关键词： PACKET RAdIO NETWORK EPLRS dISTRIBUTEd NETWORK TdMA VIRTUAL CIRCUITS MULTIHOP NETWORK BOUNdEd dELAY MOBILITY NETWORK SET-UP TIME HIERARCHICAL NETWORK NETWORK dATA RATE

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Closed‐form solution of a three‐ph.se vsi feeding a three‐ph.se static inductive load

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European Transactions on Electrical Power 1995年第4期5卷 279-284页

作者： Abdel‐Halim, I.A.M. Hamed, H.G. Slama, M.M. Prof. Dr.-Ing. Ibrahim A. M. Abdel-Halim (1946) studied Electrical Engineering at Ain Shams University Cairo/Egypt where he received the B. Sc. degree in 1968. He received his M. Sc. degree from Cairo University in 1973 and in 1978 a PbD. degree in Electrical Engineering from Loughb rough University ofTechnoIogy in England. Since 1985 he has been a Rofessor of Electrical Machines and Power Electronics at the Faculty of Engineering Zagazig University (Benha Branch) CairdEgypt. He is a Fellow of the lEE (England). (Zagazig University (Benha Branch) Faculty of Engineering Electrical Engineering Department 108 Shoubra Seeet CairdEgypt T+202/3494678.Fax+202/2023336) Dr.-Ing. Hamed Galal Hamed (1943) received the 8. Sc. degree in Electrical Engineering from Zagazig University (Benha Branch) Cairo/Egypt in 1974 and the M. Eng. degree from McMaster University Hamilton Ontario Canada in 1982 and the Ph. D. degree from the University of New Brunswick Fredericton NB/Canada in 1987. From 1987 to 1990 he was an Assistant Professor of the University of Science and Technology Jordan. Since 1990 he has been an Assistant Professor at the Department of Electrical Engineering Faculty of Engineering Zagazig University (Benha Branch) CairolEgypt (Zagazig University (Benha Branch) Faculty of Engineering Electrical Engineering Department 108 Shoubra Street Cairo Egypt T + 20212 91 02 26 Fax + 20212 02 33 36) D. Mohamed Moenes Slama (1948) received his B. Sc. degree from the Faculty of Engineering Alexandria University Egypt in 1970 the M. Sc. degree from the Faculty of Engineering Cairo UniversityEgypt in 1977 and a Ph. D. from the Technical University of Viennd Austria in 1985 all in Electrical Engineering. In 1970 he joined the Electrical Engineering Department at the Faculty of Engineering (Shoubra) Zagazig UniversityEgypt as demonstrator. Now he is Assistant Professor. His main field of interest is power-system analysis. (Zagazig University (Benha Branch) Faculty of Engineering Electrical Engine

In this paper, a closed‐form solution of the performance of a three‐ph.se voltage‐source, six‐step inverter feeding a three‐ph.se static inductive load is presented. Analytical expressions for the steady‐state currents of the system are derived from which the performance of the system can be investigated. Explicit formulae for the current ratings of the switching elements, whether thyristors, transistors or diodes used in the system are derived. Copyright © 1995 John Wiley & Sons, Ltd.

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Performance of a three‐ph.se induction motor fed from a non‐ideal single‐ph.se supply

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European Transactions on Electrical Power 1995年第3期5卷 215-220页

作者： Abdel‐Halim, I.A.M. Slama, M.M. Hamed, H.G. Prof. Dr.-Ing. Ibnhim A. M. Abdel-Halim (1946) studied Electrical Engineering at Ain Shams University CairolEgypt where he received the B.Sc. degree in 1%8. He received his M. Sc. degree from Cairo University in 1973 and in 1978 a Ph.D. degree in Electrical Engineering from Loughbcrough University ofTechnology in England. Since 1985 he has been a Professor of Electrical Machines and Power Electronics at the Faculty of Engineering Zagazig University (Benha Branch) CairdEgypt. He is a Fellow of the IEE (England). (Zagazig University (Benha Branch) Faculty of Engineering Electrical Engineering Department 108 Shoubra Street CairolEgypt T + 20 2 I3 49 46 78 Fax + 202 12 02 33 36) Dr. Mohamed Moenes Slama (1948) received his 9. Sc. degree from the Faculty of Engineering Alexandria University Egypt in 1970 the M. Sc. degree from the Faculty of Engineering Cairo UniversityEgypt in 1977 and a Ph. D. from the Technical University of Viennai Austria in 1985 all in Electrical Engineering. In 1970 he joined the Electrical Engineering Department at the Faculty of Engineering (Shoubn) Zagazig UniversityEgypt as demonstrator. Now he is Assistant Professor. His main field of interest is power-system analysis. (Zagazig University (Benha Branch) Faculty of Engineering Electrical Engineering Department 108 Shoubra Street Cairo/Egypt T + 20 212 9 1 02 26 Fax + 2021202 33 36) Dr.-Ing. Hamed Galal Hamed (1943) received the B. Sc. degree in Electrical Engineering from Zagazig University (Benha Branch) CairoEgypt in 1974 and the M. Eng. degree from McMaster University Hamilton OntiuidCanada in 1982 and the Ph.D. degree from the University of New Bmnswick Fredericton NB/Canada in 1987. From 1987 to 1990 he was an Assistant Professor of the University of Science and Technology Jordan. Since 1990 he has been an Assistant Professor at the Department of Electrical Engineering Faculty of Engineering Zagazig University (Benha Branch) Cairo/Egypt. (Zagazig University (Benha Branch) Faculty of Engineering Ele

The effect of supply reactance on the performance of a three‐ph.se induction motor fed from a non‐ideal single‐ph.se supply, using a capacitor ph.se converter, is investigated. Equations for predicting the performance of the motor are derived, with the effect of the single‐ph.se supply reactance taken into consideration. Star‐and delta‐connected motors are considered in deriving the performance equations. Computed results for the motor‐performance characteristics obtained when the motor is fed from a non‐ideal single‐ph.se supply are compared with those obtained when the motor is fed from a non‐ideal three‐ph.se balanced supply having the same supply reactance as that of the single‐ph.se supply. Copyright © 1995 John Wiley & Sons, Ltd.

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ACQUISITION REFORM ANd BEST PROdUCT PROCUREMENT - AN engineering VIEW

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NAVAL ENGINEERS JOURNAL 1994年第6期106卷 41-57页

作者： FISHER, dA SKOLNICK, A He has been involved with several weapon system developments. Among these were the Trident II fire control and navigation systems the BSY-I Anti-Submarine Warfare System and the Navy standard computers (UYK44 and EMSP). He served as manager of the Digital Circuits Engineering Branch and was then appointed as manager of the Automatic Test Equipment (ATE) Technology Division. As manager of the ATE Technology Division he was responsible for the SP-23 Fire Control System Support Project the SP-24 Navigation Project and the Fleet Progressive Maintenance Program (2M/ATE). This Division was responsible for selection and application of electronic product technology and for developing fleet test and repair techniques. He holds a B.S. in Electrical Engineering from the University of Evansville and is currently pursuing a Masters of Public Administration at Indiana University-Purdue University Indianapolis. Dr. Alfred Skolnick:retired from the Navy in 1983 with the rank of captain. He is president of System Science Consultants (SSC) specializing in strategic planning technical program definition technology assessment and engineering analyses on selected matters of national interest. Dr. Skolnick taught mathematics and management sciences at University of Virginia and Marymount University. He is adjunct faculty at Northern Virginia Community College. From 1985 to 1989 he was president of the American Society of Naval Engineers. In the Navy he served at Applied Physics Laboratory/The Johns Hopkins University then aboard USSBoston(CAG-1) and played leading roles in several weapon system developments inertial navigation (Polaris) deep submergence (DSRV) and advanced ship designs (SES). He later was director Combat System Integration Naval Sea Systems Command and head Combat Projects Naval Ship Engineering Center. In 1975 he became a major project manager and led the Navy's High Energy Lasers Program in 1981 he was assigned all Navy Directed Energy Weapons development efforts. He was vice president advanced tech

The military services are being moved in the direction of performance-based specifications and standards. They are being steered against dictating ''how to'' produce an item since such action forecloses on the ability to gain access to components or technology that may have a commercial equivalent. Why should the engineering community embrace the new approach? Aside from the obvious weight of it being approved policy, therefore currently mandated, it warrants examination because it is the correct approach at this time when applied to appropriate products. Military specifications and standards are to be displaced then, by acceptable alternative contractor design solutions. Industry bidders will be allowed to propose the particular design details, permitting procurement flexibility by contractually citing only system level or interface requirements, both ph.sical and functional. Hopefully, this can broaden the industrial base and increase competition with reduced costs to follow. Conceptually, the approach appears both performance-sensible and cost-attractive (there are, of course, consequent risks) but how does implementation proceed? Is it possible to pursue the goals envisioned along paths that are not in themselves experimental? Can the American postulate, minimal loss of life and limb to U.S. military people, continue to be honored? Experience and track record elsewhere imply encouraging possibilities in select situations-useful prospects are identified and discussed in practical terms.

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PERFORMANCE OF A PRIORITIZEd ON-BOARd BASEBANd SWITCH FOR A MULTISERVICE MULTIBEAM SATELLITE

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INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS 1994年第3期12卷 283-297页

作者： BOHM, S ELHAKEEM, AK HACHICHA, M Department of Electrical and Computer Engineering Concordia University 1455 De Maisonneuve Blvd. West Montreal H3A 1M8 Canada Was born in Montreal Canada on 14 September 1966. He received the B. Eng. degree in electrical engineering from Concordia University Montreal Canada in 1989. He is at present completing the M.A.Sc. degree in electrical engineering at Concordia University. (S'75–S'79–M'79–SM'86) received the Ph.D. degree from Southern Methodist University Dallas TX in 1979. He spent the next two years working as a Visiting Professor in Egypt after which he moved to Ottawa Canada in 1982. He assumed teaching and research positions in Carleton and Manitoba Univerities and later moved to Concordia University Montreal Canada in 1983 where he is now a Professor in the Electrical and Computer Engineering Department. He has published numerous papers in IEEE and international journals in the areas of spread spectrum and networking. He is a well-known expert in these areas and serves as a consultant to many companies. His current research interests include wide-band metropolitan networks switching architectures and performance of on-board multibeam satellites acquisitionless CDMA networks code distribution and orthogonalization of CDMA signals responsive congestion control for ATM-based networks ARQ techniques and investigation of the novel SUGAR CDMA systems in fading channels. Dr. Elhakeem is a Senior Member of the Canadian Electrical Engineering Society and Armed Forces Association. He has chaired numerous technical sessions in IEEE Conferences was the Technical Program Chairman for IEEE Montech 1986 Montreal Canada. Dr. Elhakeem is the key guest editor of theIEEE Journal of Selected Areas in Communicationsfor the May June issues 1993 covering CDMA networks. Advanced Technology & Networks VISTAR Telecommunications Inc. Ottawa Ontario K1G 3J4 Canada An Associate Director of Advanced Technology & Networks Group VISTAR Telecommunications Inc. Ottawa Canada. He is also an Adjunct Pr

In this paper, we study the performance of a prioritized on-board baseband switch in conjunction with a multibeam satellite handling integrated services. The services considered for the analysis include voice, video, file transfer and interactive data. The prioritized switch uses both input and output buffering, switch speed-up as well as a two-ph.se head-of-line resolution algorithm, in order to reduce the buffer loss while maintaining acceptable user delays. The minimum required buffer capacity and switch speed-up for each service in a prioritized environment are found under uniform traffic conditions. It is shown that under uniform traffic conditions, only minimal buffering and switch speed-up are needed even for the lowest priority users. The performance dependence on the switch size is also substantially reduced with head of line resolution and buffering even in a prioritized environment.

关键词： SWITCH ON-BOARd BASEBANd MULTIBEAM PRIORITIZEd HEAd-OF-LINE UNIFORM LOAd SPEEd-UP

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THE CALLING(SM) NETWORK - A GLOBAL WIRELESS COMMUNICATION-SYSTEM

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INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS 1994年第1期12卷 45-61页

作者： TUCK, EF PATTERSON, dP STUART, JR LAWRENCE, MH Calling Communications Corporation. 1900 West Garvey Ave South. Suite 200 West Covina CA 91790 USA. Chairman of Calling Communications Corporation. He is also the Managing Director of Kinship Venture Management Inc. the general partner of Kinship Partners 11 and a General Partner of Boundary the general partner of The Boundary Fund. As a venture capitalist he has founded or participated in founding several telecommunications companies including Calling Communications Corporation Magellan Systems Corporation manufactures of Global Positioning System receivers Applied Digital Access manufacturer of DS-3 test access and network performance monitoring equipment Endgate Technology Corporation specialists in satellite phased array antennas and Poynting Systems Corporation. now a division of Reliance Corporation manufacturers of fibre optic transport equipment. He was a founder of Kebby Microwave Corporation where he invented the first solid-state. frequency-modulated commercial microwave link system. The company was acquired by ITT Corporation where he rose to the position of V.P. and Technical Director of ITT North America Telecommunications Inc. Subsequently he was V.P. of Marketing and Engineering at American Telecommunications Inc. (ATC). He was founding Director of American Telecom Inc. a joint venture between ATC and Fujitsu and has served on more than 20 boards of directors including those of three public companies. He has authored articles on microwave engineering and telephone signalling and was a contributor to Reference Data For Radio Engineers. He is a graduate of the University of Missouri at Rolla where he was later awarded an honorary Professional degree and serves on its Academy of Electrical Engineering. Mr Tuck is a Senior Member of the IEEE a Fellow of the Institution of Engineers (Australia) a Professional Member of the AIAA and a registered professional engineer in three states. More than 25 years of experience in the telecommunications industry where he has been responsibl

There is a very large demand for basic teleph.ne service in developing nations, and remote parts of industrialized nations, which cannot be met by conventional wireline and cellular systems. This is the world's largest unserved market. We describe a system which uses recent advances in active ph.sed arrays, fast-packet switching technology, adaptive routeing, and light spacecraft technology, in part based on the work of the Jet Propulsion Laboratory and on recently-declassified work done on the Strategic defense Initiative, to make it possible to address this market with a global teleph.ne network based on a large low-Earth-orbit constellation of identical satellites. A teleph.ne utility can use such a network to provide the same modern basic and enhanced teleph.ne services offered by teleph.ne utilities in the urban centres of fully-industrialized nations. Economies of scale permit capital and operating costs per subscriber low enough to provide a service to all subscribers, regardless of location, at prices comparable to the same services in urban areas of industrialized nations, while generating operating profits great enough to attract the capital needed for its construction. The bandwidth needed to support the capacity needed to gain these economies of scale requires that the system use K(alph.)-band frequencies. This choice of frequencies places unusual constraints on the network design, and in particular forces the use of a large number of satellites. Global demand for basic and enhanced teleph.ne service is great enough to support at least three networks of the size described herein. The volume of advanced components, and services such as launch services, required to construct and replace these networks is sufficient to propel certain industries to market leadership positions in the early 21st Century.

关键词： LOW EARTH ORBIT SATELLITE COMMUNICATIONS FAST PACKET SWITCHING EARTH FIXEd CELLS AdAPTIVE ROUTEING LIGHT SPACECRAFT K(A) BANd ph.SEd-ARRAY ANTENNAS

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Current compensation in three‐ph.se power systems

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European Transactions on Electrical Power 1993年第1期3卷 61-66页

作者： Willems, J.L. Prof. Dr.-Ing. Jacques L. Willems (1939) received a degree in electro-mechanical engineering from the University of Gent. Gent/Belgium the Sc. M. degree in electrical engineering from the Massachusetts Institute of Technology Cambridge and the Ph. D. degree in applied science from the University of Gent in 1963 1964 and 1967 respectively. In 1964 he joined the Engineering Faculty of the University of Gent where he is presently Professor of Electrical Engineering. Since October 1988 he has been Dean of the Engineering Faculty. In 1970 he was on leave at the Division of Engineering and Applied Physics of Harvard University Cambridge Mass./USA. In 1982 he was a Visiting Professor at the Universitk Nationale du Rwanda (Central Africa). His teaching and research interests include power system analysis and control system stability theory. (University of Gent Grote Steenweg Noord 6 8-9052 Gent (Zwijnaarde) Belgium T +3291/645653 Fax +3291/645840)

In this paper the compensation of reactive and unbalanced currents in three‐ph.se power systems is discussed. The main result proved is that in sinusoidal steady state any current which corresponds to zero total active power can be compensated by means of a reactive element;the compensation of the reactive currents and the compensation of the unbalanced currents in three‐ph.se power systems are special cases of this result. The explicit expression of the compensating reactances is derived and the multiplicity of the solutions is discussed. The result is illustrated on some examples. Copyright © 1993 John Wiley & Sons, Ltd.

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ROLE OF SIMULATION IN RAPId PROTOTYPING FOR CONCEPT dEVELOPMENT

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NAVAL ENGINEERS JOURNAL 1991年第3期103卷 204-211页

作者： KING, JF BARTON, dE J. Fred King:is the manager of the Advanced Technology Department for Unisys in Reston Virginia. He earned his Ph.D. in mathematics from the University of Houston in 1977. He has been principal investigator of research projects in knowledge engineering pattern recognition and heuristic problem-solving. Efforts include the development of a multi-temporal multispectral classifier for identifying graincrops using LANDSAT satellite imagery data for NASA. Also as a member of the research team for a NCI study with Baylor College of Medicine and NASA he helped develop techniques for detection of carcinoma using multispectral microphotometer scans of lung tissue. He established and became technical director of the AI Laboratory for Ford Aerospace where he developed expert scheduling modeling and knowledge acquisition systems for NASA. Since joining Unisys in 1985 he has led the development of object-oriented programming environments blackboard architectures data fusion techniques using neural networks and intelligent data base systems. Douglas E. Barton:is manager of Logistics Information Systems for Unisys in Reston Virginia. He earned his B.A. degree in computer science from the College of William and Mary in 1978 and did postgraduate work in London as a Drapers Company scholar. Since joining Unisys in 1981 his work has concentrated on program management and software engineering of large scale data base management systems and design and implementation of knowledge-based systems in planning and logistics. As chairman of the Logistics Data Subcommittee of the National Security Industrial Association (NSIA) he led an industry initiative which examined concepts in knowledge-based systems in military logistics. His responsibilities also include evaluation development and tailoring of software engineering standards and procedures for data base and knowledge-based systems. He is currently program manager of the Navigation Information Management System which provides support to the Fleet Ballistic Missile Progr

A valuable technique during concept development is rapid prototyping of software for key design components. This approach is particularly useful when the optimum design approach is not readily apparent or several known alternatives need to be rapidly evaluated. A problem inherent in rapid prototyping is the lack of a "target system" with which to interface. Some alternatives are to develop test driver libraries, integrate the prototype with an existing working simulator, or build one for the specific problem. This paper presents a unique approach to concept development using rapid prototyping for concept development and scenario-based simulation for concept verification. The rapid prototyping environment, derived from artificial intelligence technology, is based on a blackboard architecture. The rapid prototype simulation capability is provided through an object-oriented modeling environment. It is shown how both simulation and blackboard technologies are used collectively to rapidly gain insight into a tenacious problem. A specific example will be discussed where this approach was used to evolve the logic of a mission controller for an autonomous underwater vehicle.

关键词： Military engineering

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FLAMMABILITY ANd TOXICITY OF COMPOSITE-MATERIALS FOR MARINE VEHICLES

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NAVAL ENGINEERS JOURNAL 1990年第5期102卷 45-54页

作者： SEVART, JL GRIFFIN, OH GURdAL, Z WARNER, GA Jeffrey L. Sevart:is a native of Kansas and a 1985 graduate of Kansas State University with a B.S. in mechanical engineering (magna cum laude). After working as a stress analysis engineer at Boeing Military Airplane Company in Wichita Kans. he attended Virginia Polytechnic Institute and State University and received an M.S. in engineering mechanics in February 1988. He currently resides in Akron Ohio working as a research engineer in tire composites research at The Goodyear Tire and Rubber Company. O. Hayden Griffin Jr.:received his B.S. and M.S. in mechanical engineering from Texas Tech University in 1970 and 1971 respectively. He received his Ph.D. in engineering mechanics from Virginia Polytechnic Institute and State University in 1980. Prior to joining the faculty of Virginia Polytechnic Institute and State University as associate professor of engineering science and mechanics in September 1985 he was employed at the U.S. Naval Surface Warfare Center (Dahlgren Virginia) BF Goodrich Tire Group (Akron Ohio) the Bendix Advanced Technology Center (Columbia Maryland) and the Johns Hopkins University Applied Physics Laboratory (Laurel Maryland). He is currently an associate director of the Virginia Institute for Material Systems. He is a registered professional engineer in Virginia and is a member of the American Society of Mechanical Engineers and the American Society for Composites. Zafer Gürdal:received his M.S. in mechanical and aerospace engineering from Illinois Institute of Technology in 1981 and his Ph.D. in aerospace engineering from Virginia Polytechnic Institute and State University in 1985. He worked as a research associate in the Aerospace and Ocean Engineering Department at Virginia Tech before joining the Engineering Science and Mechanics Department as an assistant professor in September 1985. Professor Gürdal's research interests include: composite structures failure mechanics of composites structural optimization and damage tolerant design. He is a member of the American Institute

Characteristics of both thermoplastic and thermoset composite materials as they pertain to marine vehicle applications are discussed. Comparison of various material selection factors such as strength, damage and moisture resistance, and flammability and toxicity as well as cost and availability of thermoset and thermoplastic composite materials are presented. Methods for testing and reducing the flammability and toxicity are discussed. Many commercially available composite systems are reported to provide favorable characteristics for marine applications. Although there seems to be a need for improved production technology for thermoplastics, they present potential advantages in ph.sical properties over thermoset composites.

关键词： Composite Materials

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COMPUTER-SYSTEM ARCHITECTURE CONCEPTS FOR FUTURE COMBAT SYSTEMS

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NAVAL ENGINEERS JOURNAL 1990年第3期102卷 43-62页

作者： ZITZMAN, LH FALATKO, SM PAPACH, JL Dr. Lewis H. Zitzman:is the group supervisor of the Advanced Systems Design Group Fleet Systems Department The Johns Hopkins University Applied Physics Laboratory (JHU/APL). He has been employed at JHU/APL since 1972 performing applied research in computer science and in investigating and applying advanced computer technologies to Navy shipboard systems. He is currently chairman of Aegis Computer Architecture Data Bus and Fiber Optics Working Group from which many concepts for this paper were generated. Dr. Zitzman received his B.S. degree in physics from Brigham Young University in 1963 and his M.S. and Ph.D. degrees in physics from the University of Illinois in 1967 and 1972 respectively. Stephen M. Falatko:was a senior engineering analyst in the Combat Systems Engineering Department Comptek Research Incorporated for the majority of this effort. He is currently employed at ManTech Services Corporation. During his eight-year career first at The Johns Hopkins University Applied Physics Laboratory and currently with ManTech Mr. Falatko's work has centered around the development of requirements and specifications for future Navy systems and the application of advanced technology to Navy command and control systems. He is a member of both the Computer Architecture Fiber Optics and Data Bus Working Group and the Aegis Fiber Optics Working Group. Mr. Falatko received his B.S. degree in aerospace engineering with high distinction from the University of Virginia in 1982 and his M.S. degree in applied physics from The Johns Hopkins University in 1985. Mr. Falatko is a member of Tau Beta Pi Sigma Gamma Tau the American Society of Naval Engineers and the U.S. Naval Institute. Janet L. Papach:is a section leader and senior engineering analyst in the Combat Systems Engineering Department Comptek Research Incorporated. She has ten years' experience as an analyst supporting NavSea Spa War and the U.S. Department of State. She currently participates in working group efforts under Aegis Combat System Doctrin

This paper sets forth computer systems architecture concepts for the combat system of the 2010–2030 timeframe that satisfy the needs of the next generation of surface combatants. It builds upon the current Aegis computer systems architecture, expanding that architecture while preserving, and adhering to, the Aegis fundamental principle of thorough systems engineering, dedicated to maintaining a well integrated, highly reliable, and easily operable combat system. The implementation of these proposed computer systems concepts in a coherent architecture would support the future battle force capable combat system and allow the expansion necessary to accommodate evolutionary changes in both the threat environment and the technology then available to effectively counter that threat. Changes to the current Aegis computer architecture must be carefully and effectively managed such that the fleet will retain its combat readiness capability at all times. This paper describes a possible transition approach for evolving the current Aegis computer architecture to a general architecture for the future. The proposed computer systems architecture concepts encompass the use of combinations of ph.sically distributed, microprocessor-based computers, collocated with the equipment they support or embedded within the equipment itself. They draw heavily on widely used and available industry standards, including instruction set architectures (ISAs), backplane busses, microprocessors, computer programming languages and development environments, and local area networks (LANs). In this proposal, LANs, based on fiber optics, will provide the interconnection to support system expandability, redundancy, and higher data throughput rates. A system of cross connected LANs will support a high level of combat system integration, spanning the major warfare areas, and will facilitate the coordination and development of a coherent multi-warfare tactical picture supporting the future combatant command st

关键词： Computer Architecture

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