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A mETHOD FOR AssEssING REsIDUAL NAPL BAsED ON ORGANIC-CHEmICAL CONCENTRATIONs IN sOIL sAmPLEs

GROUND WATER mONITORING AND REmEDIATION 1991年第2期11卷 128-136页

作者： FEENsTRA, s mACKAY, Dm CHERRY, JA Stan Feenstra is a hydrogeochemist and president of Applied Groundwater Research Ltd. in Mississauga Ontario He received a B.Sc. in earth sciences and an M.Sc. in hydrogeology from the University of Waterloo in 1978 and 1980 respectively and was designated a Certified Ground Water Professional by AGWSE in 1989. Since 1980 he has been a ground water consultant with Golder Associates in Mississauga Ontario and Zenon Environmental in Burlington Ontario and founded Applied Groundwater Research Ltd. in 1987. Feenstra specializes in the hydrogeochemical evaluation of ground water contamination at waste disposal facilities and chemical spill sites. He is currently a Ph.D. candidate in hydrogeology and research associate in the Waterloo Centre for Ground Water Research at the University of Waterloo (Waterloo Ontario N2L 3G1) and is involved in research related to the behavior of dense organic solvents in ground water. Douglas M. Mackay is an adjunct professor at the Waterloo Centre for Groundwater Research at the University of Waterloo Waterloo Ontario (N2L3G1). Dr. Mackay received a B.S. in engineering and M.S. and Ph.D. in civil engineering from Stanford University in 1970 1973 and 1981 respectively. From 1986 to 1990 he was a faculty member of the Environmental Science and Engineering Program of the UCLA School of Public Health. His research focuses on field studies of transport and fate of organic chemicals in ground water various scale studies of decontamination of soil and ground water and ground water monitoring technologies. John A. Cherry is a professor at the Waterloo Centre for Groundwater Research at the University of Waterloo Waterloo Ontario (N2L 3G1). He received his B.S. in geological engineering from the University of Saskatchewan in 1962. He received his M.S. from the University of California at Berkeley in 1964 and his Ph.D. from the Department of Geology at the University of Illinois in 1966. His research interests include the field study and modeling of contaminants in ground wat

Ground water contamination by non-aqueous phase liquid (NAPL) chemicals is a serious concern at many industrial facilities and waste disposal sites. NAPL in the form of immobile residual contamination, or pools of mobile or potentially mobile NAPL, can represent continuing sources of ground water contamination. In order to develop rational and cost-effective plans for remediation of soil and ground water contamination at such sites, it is essential to determine if non-aqueous phase liquid (NAPL) chemicals are present in the subsurface and delineate the zones of NAPL contamination. The presence of NAPL pools may be evident as a floating or sinking phase in monitoring wells. The residual NAPL contamination may be identified in soil samples if residual contents are high and contaminated zones in the soil cores are thick. However, visual identification may not be effective if residual contents ar elow or if the NAPL residual is distributed heterogeneously in the samples. The chemical analysis of soil samples provides a measure of the total chemical concentration in the soil but cannot determine directly whether NAPL is present in the samples. Qualitatively, soil analyses that exhibit chemical concentrations in the percent range or > 10,000 mg/kg would generally be considered to indicate the presence of NAPL. However, the results of soil analyses are seldom used in a quantitative manner to assess the possible presence of residual NAPL contamination when chemical concentrations are lower and the presence of NAPL is not obvious. The assessment of the presence of NAPL in soil samples is possible using the results of chemical and physical analyses of the soil, and the fundamental principles of chemical partitioning in unsaturated or saturated soil. The method requires information on the soil of the type typically considered in ground water contamination studies and provides a simple tool for the investigators of chemical spill and waste disposal sites to assess whether soil

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mAGNETOHYDRODYNAmIC sUBmARINE PROPULsION sYsTEms

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NAVAL ENGINEERs JOURNAL 1991年第3期103卷 141-157页

作者： sWALLOm, DW sADOVNIK, I GIBBs, Js GUROL, H NGUYEN, LV VANDENBERGH, HH Daniel W. Swallomis the director of military power systems at Avco Research Laboratory Inc. a subsidiary of Textron Inc. in Everett Mass. Dr. Swallom received his B.S. M.S. and Ph.D. degrees in mechanical engineering from the University of Iowa Iowa City Iowa in 1969 1970 and 1972 respectively. He has authored numerous papers in the areas of power propulsion and plasma physics and currently is a member of the Aerospace Power Systems Technical Committee of the AIAA. Dr. Swallom has directed various programs for the development of advanced power generation systems lightweight power conditioning systems and advanced propulsion systems for marine applications. His previous experience includes work with Odin International Corporation Maxwell Laboratories Inc. Argonne National Laboratory and the Air Force Aero Propulsion Laboratory. Currently Dr. Swallom is directing the technical efforts to apply magnetohydrodynamic principles to a variety of propulsion and power applications for various marine vehicles and power system requirements respectively. Isaac Sadovnikis a principal research engineer in the Energy Technology Office at Avco Research Laboratory Inc. a subsidiary of Textron Inc. He received his B.S. in engineering (1974) B.S. in physics (1975) M.S. in aeronautics and astronautics (1976) and Ph.D. in physics of fluids (1981) at the Massachusetts Institute of Technology. Dr. Sadovnik has been involved in research work funded by DARPA concerning the use of magnetohydrodynamics for underwater propulsion. He has built theoretical models that predict the hydrodynamic behavior of seawater flow through magnetohydrodynamic ducts and their interaction with the rest of the vehicle (thrust and drag produced). In addition Dr. Sadovnik has been involved in research investigations geared toward the NASP program concerning the use of magnetohydrodynamic combustion-driven accelerator channels. Prior to joining Avco Dr. Sadovnik was a research assistant at MIT where he conducted experimental and

magnetohydrodynamic propulsion systems for submarines offer several significant advantages over conventional propeller propulsion systems. These advantages include the potential for greater stealth characteristics, increased maneuverability, enhanced survivability, elimination of cavitation limits, greater payload capability, and the addition of a significant emergency propulsion system. These advantages can be obtained with a magnetohydrodynamic propulsion system that is neutrally bouyant and can operate with the existing submarine propulsion system power plant. A thorough investigation of magnetohydrodynamic propulsion systems for submarine applications has been completed. During the investigation, a number of geometric configurations were examined. Each of these configurations and mounting concepts was optimized for maximum performance for a generic attack class submarine. The optimization considered each thruster individually by determining the optimum operating characteristics for each one and accepting only those thrusters that result in a neutrally buoyant propulsion system. The results of this detailed optimization study show that the segmented, annular thruster is the concept with the highest performance levels and greatest efficiency and offers the greatest potential for a practical magnetohydrodynamic propulsion system for attack class submarines. The optimization study results were used to develop a specific point design for a segmented, annular magnetohydrodynamic thruster for an attack class submarine. The design point case has shown that this thruster may be able to provide the necessary thrust to propel an attack class submarine at the required velocity with the potential for a substantial acoustic signature reduction within the constraints of the existing submarine power plant and the maintenance of neutral buoyancy. This innovative magnetohydrodynamic propulsion system offers an approach for submarine propulsion that can be an important contributio

关键词： ship Propulsion

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A monitoring of superconducting magnets by acoustic em.s.ion

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Electrical Engineering in Japan 1991年第3期111卷 99-107页

作者： Nomura, Harehiko Tateishi, Hiroshi Onishi, Toshitada Received a B.S. in 1967 from Nagoya University. He also has a Ph.D. He joined the Electric Laboratories (presently Electronic Technological Laboratories) in April 1967. Presently he is a Chief Researcher in the superconductor application group in the Department of Energy. He has been involved in the stabilization and safe operation of superconducting magnets. He was a Visiting Researcher at MIT in 1978–1979. He received the Ichimura Award in 1979. He is a member of the Low Temperature Superconducting Society. Received a B.S. in 1979 from Tokyo University. He joined Electronic Technological Laboratories in April 1979. Presently he is with the superconductor application group in the Department of Energy. He has been involved in the study of pulsed superconducting magnets and ac operation of superconducting magnets. He received a progress award from the Electrical Society in 1984. He is a member of the Low Temperature Society and of the Applied Physics Society. Received an M.S. in 1967 from Osaka University and joined the Electrical Laboratories (presently Electronic Technological Laboratories). He also has a Ph.D. He is a Section Chief of the superconductor application group in the Department of Energy. He has been involved in the R&D of ac superconductors. He was a Visiting Researcher at Brookhaven National Laboratories in the United States from Dec. 1976 to Nov. 1977. He was a Committee Member of the Electrical Society Tokyo district in 1986 and 1987. He received an Achievement Award from the Ministry of Science in 1985. He is a member of the Applied Physics Society Low Temperature Society Plasma Fusion Society and Laser Society.

since superconducting magnetc (sCm) are going to be indispensable for magnetic levitated trains, nuclear fusion, magnetic resonance imaging, rotational machines, etc., great reliance m.s. be placed on their repetitional operations. However, without appropriate evaluating methods, techniques with such high prom.s. m.s. remain at the scientific level and difficult to tranfer to real human technologies. sCm, used under dynamical operation and linked with other electromagnetic systems, induce high voltage which makes the monitoring of superconducting to normal transitional voltage difficult to distinguish. To solve the forementioned problem, monitoring sCm by acoustic em.s.ion (AE) has been found to be effective, particularly during their dynamical energizing. To demonstrate this, this paper reports primarily on how to monitor the 3‐mJ sCm, and presents some results of experiment. These results were obtained by the counting and locational mode of AE in pulsed and repeated operations of the magnet. Finally, some discussions are presented on the AE monitorings regarding the main issues to be addressed in the future. Copyright © 1991 Wiley Periodicals, Inc., A Wiley Company

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AEGIs AAW CORRELATOR TRACKER (AACT) EXPERImENT

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NAVAL ENGINEERs JOURNAL 1990年第3期102卷 37-42页

作者： GRANT, CJ The Author:is an assistant group supervisor of the Anti-Air Warfare Systems Engineering Group in the Fleet Systems Department of The Johns Hopkins University Applied Physics Laboratory (JHU/APL). He received a B.S. in physics from the University of Maryland in 1978 an M.S. in applied physics and an M.S. in computer science from The Johns Hopkins University in 1982 and 1984 respectively. Since joining JHU/APL in 1978 Mr. Grant has been involved in the development and integration of advanced command support systems and communications in U.S. Navy shipboard combat systems with particular emphasis on the Aegis Combat System. He is currently the lead engineer of the Command Support At Sea Experiment in which an Aegis AAW Correlator/Tracker capability is being developed for shipboard evaluation.

The Johns Hopkins University applied physics Laboratory, in continuing development of the Aegis Command and Control capabilities aboard Uss Ticonderoga class cruisers and Uss Arleigh Burke class destroyers, under the direction of the Aegis shipbuilding Project (Pms-400), is in the process of developing the Aegis AAW Correlator/Tracker (AACT) to experiment with and evaluate the capability to correlate track and contact data from over-the-horizon (OTH) sources and sensors with the shipboard real-time tactical picture. AACT, which is based on multi-hypothesis correlation algorithms, is intended to be fully automated; requiring little or no operator interaction in spite of ambiguous or conflicting data. Unlike other OTH correlator/tracker designs, the experimental AACT capability is highly integrated with the combat system. It makes maximum use of the shipboard sensor data, such as that provided by the AN/sPY-1 radar, to provide the basis from which to correlate the OTH data in areas of mutual sensor coverage. This approach helps to resolve the traditional conflicts between the tactical picture derived from battle group sensors and that derived from OTH sensors, and provides command the track data in the formats, rates, and timeliness needed to fight the AAW battle. This paper describes the AACT concept, design, and implementation. It addresses the plans for installation of AACT aboard an Aegis cruiser for evaluation of this capability in an operational environment.

关键词： Computer Graphics

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COmPARIsONs OF 3 mETHODs TO DETERmINE THE VERTICAL sTRATIFICATION OF PORE FLUIDs

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GROUND WATER mONITORING AND REmEDIATION 1990年第1期10卷 91-95页

作者： TAYLOR, K HEss, J mAZZELLA, A HAYWORTH, J Dr. Kendrick Taylor was awarded a doctorate in hydrogeology from the University of Nevada at Reno in 1987. He holds an M.S. and a B.S. from the University of Wisconsin and Colorado Schools of Mines respectively. His current research interest is the development of geophysical methods for hydrologic applications. In addition to his position at the Desert Research Institute (Water Resources Center P.O. Box 60220 Reno N V 89506) he instructs a course in hydrogeophysics at the University of Nevada at Reno. Dr Aldo Maz Ila received a B.A. in physics from of Maryland and a Ph.D. in engineering geoscience from the University of California Berkeley (1976). He worked four years in the Institute of Fluid Dynamics and Applied Mathqmatics at the University of Maryland and five years at Physics International Co.on equation of state and fluid dynamics projects. He was founder and president of Terraphysics Co. for 11 years a company specializing in geophysical research and exploration for geothermal minerals and ground water. In 1985 he joined the U.S. EPA Environmental Monitoring Systems Laboratory Subsurface Monitoring Branch (P.O.Box 93478 Las Vegas NV89193-3478). He is a project officer on a wide variety of geophysical research and technical support projects for detection of subsurface contaminations and ground water investigations. Joel S. Hayworth obtained his B.S. in geophysics from the University of California Santa Barbara in 1986 and his M.S. degree in hydrogeology from the University of Nevada Las Vegas in 1988. He worked as a research assistant at the University of Nevada's Desert Research Institute and is currently working on a Ph.D. in civil engineering (hydrology) at A uburn University.His research interests include application of geophysical methods to ground water investigations and mathematical modeling of aquifer contaminant transport processes. Dr. John Hess received his B.S. in geophysics and his Ph.D. in hydrogeology from the Pennsylvania State University in 1969 and 1974 respectively

Three methods were used to investigate the possibility of vertical stratification of the pore fluid in an aquifer. The wells available for the study were fully screened and had a 5cm disturbed annulus around them. The first method used a pump with a straddle packer to isolate a short section of the secreened interval. A tracer test demonstrated that m.s. of the pumped sample came from the well bore, presumably by piping through the disturbed. annulus. The second method used induction logs to measure the formation electrical conductivity as a function of depth. Due to the presence of clays and an inability to obtain porosity information, it was not possible to determine the pore fluid electrical conductivity using induction logs. A third method, dilution sampling, was developed that used a straddle packer to isolate a segment of the well screen. A tracer was injected into the packed-off segment, and the tracer concentration in the well was monitored. The tracer was removed from the packed-off segment by dilution and advection by ground water. When the tracer was completely removed from the packed-off segment, the fluid in the segment was considered to be representative of the adjacent pore fluid. Only the dilution sampling method determined unambiguously that the pore fluid was not stratified.

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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 m.s. be carefully and effectively managed such that the fleet will retain its combat readiness capability at all tim.s. 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 physically 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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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 therm.s.t 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 therm.s.t 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 physical properties over therm.s.t composites.

关键词： Composite materials

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AEGIs DIsPLAY sYsTEm mAP DATA-BAsE

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NAVAL ENGINEERs JOURNAL 1990年第3期102卷 138-145页

作者： PANTAZOPOULOs, mV BARKER, RG sLImmER, RL Michael V. Pantazopoulos:has been a physicist at the Naval Surface Warfare Center in Dahlgren Va. since August 1985. He received his B.S. and M.S. in physics from Emory University. He has been a member of the Aegis Display System Group in the Aegis Combat Direction Systems Branch since 1985. This group maintains the Aegis coastline map data base and most of his work has been in the developing analyzing and testing of the digital map data bases. R. Gordon Barker:has been a mathematician at the Naval Surface Warfare Center in Dahlgren Va. since 1964. He received a B.S. from the University of Virginia and did his graduate study at Princeton University. He has been a member of the Aegis Display System Group since 1982. During the development of the Mark 1 Aegis Display System Map Data Base Mr. Barker wrote the program to perform the “data thinning” of the map data. In order to support the system upgrades in progress Mr. Barker developed a tool to polygonize the map data. Rebecca L. Slimmer:has been a computer scientist at the Naval Surface Warfare Center in Dahlgren Va. since 1984. She received her B.S. from Sam Houston State University. She has been a member of the Aegis Display System Group since 1984. Her work has included maintaining and upgrading the Aegis Display System Map Data Base Generation Computer Program participation in Defense Mapping Agency data base evaluations and development of a map data base for the Naval Intelligence Processing System in a joint effort with M. Pantazopoulos. She currently serves as the point of contact for the Aegis Display System Map Data Base.

The Aegis Combat system is an advanced integrated combat system engineered specifically for Ticonderoga class cruisers. An essential component of this system is the Aegis Display system (ADs), which displays real-time ownship and fleet tactical information. Integral to the ADs is the display of coastline map data to provide geographic perspective to the tactical picture. The purpose of this paper is to describe the design and implementation of the map data base into the ADs. The original ADs equipment limited the number of coastline points which could be displayed at one time, thus leading to the development of several data thinning techniques. The requirements for real-time maps also motivated the introduction of some novel features into the data base architecture. The data base was required to support nine range scales and yet maintain the same approximate density of points throughout the entire world. To accomplish this, the data were partitioned into “windows,” with a uniform.s.ze based on distance rather than an angular measurement. This resulted in windows approximately the same size in area, but with a longitudinal width which increases as polar latitudes are approached. The number of data points was then reduced by applying several thinning algorithms so that the desired point densities were reached. The windows were organized into four separate data subbases, each with a different window size but a similar point density. This scheme allows coverage of an entire display area with at m.s. four windows at any range scale. The display speed was optimized by exploiting the Aegis Combat system.s.use of orthographic projection from the earth's surface to the display plane. This type of projection permits integer arithmetic in the transformation projection equations when the data points are stored as X,Y,Z earth-centered coordinates instead of as latitude and longitude. This results in substantially faster map processing and display tim.s. thereby allowing the ADs

关键词： Display Devices

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THE AEGIs DATA BUs EXPERImENT

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NAVAL ENGINEERs JOURNAL 1989年第5期101卷 53-58页

作者： FRINK, JG VERVEN, Dm John G. Frink is an assistant group supervisor in the Fleet Systems Department of The Johns Hopkins University Applied Physics Laboratory. He received his B.S. degree in physics from Michigan State University in 1968 and the M.S. degree in computer science from the University of Maryland in 1971. Mr. Frink worked at the Naval Surface Weapons Center White Oak Laboratory on a variety of weapons systems before joining the Applied Physics Laboratory in 1978. Mr. Frink has supervised the development of a large scale battle group simulation that successfully employs the receiver selection paradigm described herein on a hardware suite composed of an extensible number of (currently 15) processors. David M. Verven is a senior electrical engineer in the Fleet Systems Department of The Johns Hopkins University Applied Physics Laboratory. He received the B.S. degree in electrical engineering from the University of Maryland College Park in 1979 and the M. S. degree in the same discipline from The Johns Hopkins University in 1984. Mr. Verven joined the Applied Physics Laboratory in 1979 and initially worked on analysis of Navy sensor systems. In 1981 he was the AN/SPS-49 test team leader for the New Threat Upgrade (NTU) combat system land-based test. In 1982 he became involved in the development of the BBWRS system. Currently he is involved in real-time computer program development for the CEP project.

This paper documents an experiment performed by The Johns Hopkins University applied physics Laboratory to measure the effect of inserting a data bus into a combat system. The experiment was conducted at the Aegis Computer Center located at the Naval surface Weapons Center in Dahlgren, Virginia (NsWC/DL). The purpose of the experiment was to determine whether or not the Aegis Weapon system (the core of the Aegis Combat system) could be operated with a portion of its point-to-point interelement cables replaced by a data bus. The data bus chosen for the experiment employs m.s.age broadcasting with receiver selection. A primary goal of the experiment was to minimize the amount of Aegis computer program changes required to accommodate the data bus. The results presented in this paper will show that the experiment was a success. Key certification tests were passed with no computer program changes to the tactical elements and minimal changes in the Aegis tactical executive (ATEs) program (less than 110 words changed).

关键词： Data Transm.s.ion Equipment

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sUBmERsIBLE OUTBOARD ELECTRIC mOTOR PROPULsOR

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NAVAL ENGINEERs JOURNAL 1989年第5期101卷 44-52页

作者： BROWN, DW REPP, JR TAYLOR, Os D. W. Brown is an engineer at the Westinghouse Research and Development Center. He received a B.S. in mechanical engineering from Michigan Technological University and an M.S. in mechanical engineering from Michigan State University. Mr. Brown joined Westinghouse in 1986 and has since worked on such projects as the testing and analysis of current collection apparatus the design of shaft and bearing arrangements for high speed electrical motors and the design of a submersible electric motor. He also has experience in the use and analysis of fiber-reinforced composites at room temperature and at cryogenic temperatures. This knowledge of composites was applied to a study involving a fibrous composite robot arm. Mr. Brown is working on the rotor design of a cryogenically cooled AF generator and also the design of the vertical motor test facility for the Motor Silencing Program. Jeffrey R. Repp is a senior engineer with Westinghouse Research and Development Center. He received a B.S. in electrical engineering from Pennsylvania State University an M.S. in electrical engineering from the University of Cincinnati and an M.B.A. in management/industrial management from Xavier University. Mr. Repp has 13 years of experience in the field of electrical engineering specializing in the design and analysis of electromagnetic devices. This experience includes the development design testing and analysis of a wide variety of electric motors ranging from fractional horsepower permanent magnet motors through large (10000 hp) synchronous and induction motors. Mr. Repp has been directly involved in the electromagnetic and thermal analyses of machines utilizing state-of-the-art finite element and computer graphic techniques. Most recently he has been concerned with the development of electronically commutated permanent magnet (brushless dc) products. Mr. Repp is a Member Institute of Electrical and Electronics Engineers IEEE Power Engineering Society. O. S. Taylor is manager of electromechanical applications at the Westin

mr. Taylor has more than 18 years of experience in the field of research and development engineering. since joining Westinghouse in 1974 he has been involved in the design and development of advanced electrical machinery including large, high power density motors for electric drive ship propulsion, pulsed homopolar generators for electromagnetic launchers, high current density contacts for switching applications, research in automated manufacturing, and robotic system development. He is currently managing a section that deals with rotating power equipment for military applications, with emphasis on thermal and electromagnetic modeling. ABsTRACT A demonstration submersible outboard electric motor/ propulsor has been designed, built, and successfully tested. This concept involves mounting a propeller directly inside a rotor of a specially designed induction motor. This motor/ propulsor has the advantages of direct seawater cooling and bearing lubrication, direct drive, shrouded propeller, variable positioning, easy access, and high maneuverability. The motor/propulsor is readily adaptable to dual, independently-controlled and contra-rotating propellers without the need for gears. The concept has been investigated conceptually for application to primary propulsion, secondary propulsion, and pod drives, for amphibious, surface, and undersea vehicles.

关键词： ship Propulsion

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