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Dynamic analysis: Sail the ship before it's built

NAVAL ENGINEERS JOURNAL 1997年第2期109卷 83-91页

作者： Dupuis, R Neilson, J Richard Dupuis:received a bachelor of science degree in mathematics and physics from Bishop's University in 1975 and a bachelav of applied science degree in mathematics and vnechani-cal engineering from Queen's University in 1979. From 1979 to 1982 he worked jbr Pratt & Whitney Canada as a gas turbine engine dynamics analyst and was involved in full scale engine testing. He joined GasTOPS Ltd. in 1982 and has been involved in a number of projects related to control system analysis design and simulation of mechanical and electromechanical systems for aircrafl and marim propulsion systems. He has eval-uated the dynamic Performance of propulsion systems for a variety of ships including destroyers frigates icebreakers mine-hunters and submarines. He is currently the vice president of the Controls & Instrumentation Division at GasTOPS Ltd. Jeff Neilson:received a bachelor of mechanical engineering degree from Carleton University in 1986. Since graduating he has worked for GasTOPS Ltd. and has been involved in a number of projects related to control system analysis design and simulation of mechanical systemsfor aircraft and marine propul-sion systems. He has evaluated the dynamic perfom2ance of gas turbine and diesel powered propulsion systems for destroyers frigates corvettes minehunters and landing ships. He is currently the manager of simulation systems in the Controls & Instrumentation Division of GasTOPS Ltd.

A combatant ship is a complex system that involves the integration of many subsystems and components. Everyone agrees that systems integration is essential;nevertheless, the ability to deal with it is viewed as being elementary at one end of the spectrum to overly complex at the other end. Past emphasis has been on the development of the necessary tools and organizations needed to produce components that can be used to configure systems. As a consequence, when dealing with systems integration, the focus is primarily on what the system is and how its components fit, rather than what if does. Computer technology is benefiting the marine industry in many ways. Although it has been used to progressively improve the capability to deal with the component issues related to systems integration, the marine industry has yet to recognize the merits of effectively using the technology to address system functionality issues. This paper elaborates on the difficulty in dealing with system functionality and describes a way in which computer based simulation of propulsion machinery systems can be used to deal with the functionality aspects of systems integration. When procuring a ship, propulsion system simulation permits us to ''sail it before we build it.''

关键词： Shipbuilding

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A neural network recognition system for machine printed characters on coils

A neural network recognition system for machine printed char...

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Conference Record of the IEEE Industry Applications Society Annual Meeting (IAS)

作者： T. Yanagita T. Tanaka A. Toshima Kashina Steel Works Sumitomo Metal Industries Limited Japan Kokura Steel Works Sumitomo Metal Industries Limited Japan Instrumentation System & Development Department Sumitomo Metal Industries Control Engineering Corporation

A new system applying the inherent pattern recognition capability of a neural network has been developed for the task of recognizing machine printed alphanumerics on steel coils. The system has been used in the newly constructed No.2 Kashima cold strip mill (2KCM) since April 1993 and has contributed to fully automatic operation in the 2KCM. The system is 100% accurate in detecting coils that have been transported by mistake, and can do so within a few seconds.

关键词： Neural networks Character recognition Coils Milling machines Strips Steel Metals industry Automatic control control systems Computer displays

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Explicit fuzzy force control of industrial manipulators with position servo drives

Explicit fuzzy force control of industrial manipulators with...

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IEEE International Workshop on Intelligent Robots and systems (IROS)

作者： I.H. Suh K.S. Eom H.J. Yeo B.H. Kang S.-R. Oh B.H. Lee Intelligent Control and Robotics Laboratory Department of Electrvnics Engineering Hanyang University South Korea Samsung Data System Company Limited South Korea Division of Electronics and Infonmation technology KIST Seoul South Korea Robotics and Intelligent Systems Laboratory Department of Control and Instrumentation Engineering Seoul National University South Korea

In this paper, a fuzzy force control algorithm is suggested for commercialized industrial robots equipped with the position servo drives, where control rules of the proposed fuzzy controller are changed according to the magnitude of environmental stiffness in such a way that good force response is maintained regardless of changes of environmental stiffness. Specifically, some fuzzy control rules are designed for several representative environmental stiffness values, and then a control action for a given arbitrary environmental stiffness value is decided by a fuzzy interpolation method. To show the validity of the proposed fuzzy controller, several experimental results are illustrated, where a 5-axis articulated robot manipulator equipped with the wrist force/torque sensor system and our prototype dual robot controller are employed.< >

关键词： Fuzzy control Force control Industrial control Manipulators Torque control control systems Robot sensing systems Commercialization Service robots Servomechanisms

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ACCURACY REQUIREMENTS FOR MEASUREMENT systemS WITH UNIFORM AND NORMAL ERRORS

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NAVAL ENGINEERS JOURNAL 1993年第1期105卷 66-69页

作者： SNOW, JM STUCKMAN, BE USHER, JS Jeffrey M. Snow:received his B.S. degree in mechanical engineering from the University of Washington in 1977. He has worked at Boeing Commercial Aircraft Company and Puget Sound Naval Shipyard. Since 1985 he has been at Naval Surface Warfare Center Crane Division (NSWCC). From 1987 to 1990 he was in charge of quality assurance configuration management and reliability for Aegis (SPY-1 and Mk-99) microwave tubes. He currently is in the Radar System Branch at NSWCC. He is a member of ASQC and ASME. His areas of interest include the use of statistics in process improvement efforts and objectively rating and rewarding suppliers for better quality. Bruce E. Stuckman:holds a Ph.D. degree in systems engineering from Oakland University where he also obtained M.S. and B.S. degrees in electrical and computer engineering. In 1992 Dr. Stuckman obtained his J.D. from the University of Louisville where he graduated cum laude. He is currently an associate in the patent and computer law department of Brooks & Kushman a law firm specializing in intellectual property and technology related causes. Prior to this he was an associate professor of both electrical engineering at the University of Louisville and a member of the Research Advisory Board of the South Central Bell Telecommunications Research Center. Dr. Stuckman is the author of over 75 published works in a variety of research areas including global optimization algorithms control systems communication and telecommunication systems and instrumentation electronics. He has served as a technical consultant to such organizations as Control Data Corporation General Electric General Motors Research Laboratories Gulf & Western AT&T Bell Laboratories ARCO Research and Technical Services and the U.S. Government and has been a frequent lecturer at national and international symposia. He is a senior member of IEEE and a member of ASNE Eta Kappa Nu Tau Beta Pi Sigma Xi and Phi Kappa Phi. John S. Usher Ph.D. P.E.:is an assistant professor of industrial engineering

Accuracy requirements are usually determined as a percentage of the specification range of the measured part or process. Setting accuracy requirements in this manner results in a wide and unpredictable range of false rejection and acceptance probabilities. This causes extra costs due to either: 1) over specification of measurement systems accuracy requirements;2) time, effort, retesting, and resolution of false rejections;or 3) system degradation caused by false acceptance of out-of-specification parts. Achieving a consistent and known risk of false acceptance is only possible by considering the measured process C(pk), the process's mean in relation to the center of the specification range, and the measurement system error distribution. This paper presents a method for calculating the probabilities of false rejection and false acceptance for a normal process which is measured with, alternately, uniform and normally distributed error. It is shown that under most conditions uniform error causes 20% to 30% higher false rejection and acceptance probabilities. Thus, knowledge of measurement error distribution could provide lower total production cost.

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AN ADVANCED METHODOLOGY FOR PRELIMINARY HULL FORM DEVELOPMENT

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NAVAL ENGINEERS JOURNAL 1984年第4期96卷 147-161页

作者： LIN, WC DAY, WG HOUGH, JJ KEANE, RG WALDEN, DA KOH, IY Wen-Chin Lin:heads the Ship Powering Division at the David Taylor Naval Ship R&D Center (DTNSRDC). Dr. Lin received his B.S. degree in mechanical engineering from the National Taiwan University in 1957. He was awarded his M.S. degree in naval architecture and Ph.D. in engineering science from the University of California at Berkeley in 1963 and 1966 respectively. From 1966 to 1969 he was employed by ESSO Research and Engineering Company to conduct marine hydrodynamic research for oil tankers and offshore structures. Since joining DTNSRDC in 1969 he has actively conducted and directed hydrodynamic research to advance naval ship design technology and improve ship performance. Active in national and international symposia on ship hydrodynamic research he is recognized for contributions to the ship research community. For the past six years he has been a member of the Performance Committee of the ITTC and currently serves as secretary of the committee. He is a member of SNAME and the Society of Naval Architects of Japan. William G. Day Jr:. has been employed as a naval architect at the David Taylor Naval Ship R&D Center since receiving a B.E.S. degree from the Johns Hopkins University in 1966. He obtained an M.S. E. degree from George Washington University in 1971. As Head Design Evaluation Branch of the Ship Performance Department he is responsible for model experiments to evaluate the hydrodynamic performance of ships and propulsors. He is a member of ASNE and SNAME. In-Young Koh:received his B.S. and M.S. degrees in electrical engineering from Lowell University in 1969 and 1971 respectively and his Ph.D. in applied mechanics from Rensselaer Polytechnic Institute in 1976. Dr. Koh joined DTNSRDC as an electronic engineer specializing in the application of advanced instrumentation and computer techniques to ship research and design. He is currently engaged in research and development of active control systems for naval ship applications. Dr. Koh is a member of ASNE SNAME and IEEE. David Andrew Walden:is

A ship design methodology is presented for developing hull forms that attain improved performance in both seakeeping and resistance. Contrary to traditional practice, the methodology starts with developing a seakeeping-optimized hull form without making concessions to other performance considerations, such as resistance. The seakeeping-optimized hull is then modified to improve other performance characteristics without degrading the seakeeping. Presented is a point-design example produced by this methodology. Merits of the methodology and the point design are assessed on the basis of theoretical calculations and model experiments. This methodology is an integral part of the Hull Form Design system (HFDS) being developed for computer-supported naval ship design. The modularized character of HFDS and its application to hull form development are discussed.

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The Quality control system of Sintering Plant at Kashima Steel Works

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IFAC Proceedings Volumes 1983年第15期16卷 347-355页

作者： o. Arai A. Yamamoto T. Joko K. Inada S. Yumoto Instrumentation and Control Engineering Section Kashima Steel Works Sumitomo Metal Industries Ltd. Ibaraki 314 Japan Iron-making Control Section Kashima Steel Works Sumitomo Metal Industries Ltd. Ibaraki 314 Japan Instrumentation and Control Technology Department Central Research Laboratory Sumitomo Metal Industries Ltd. Hyogo 660 Japan System Planning Department Kahima Steel Works Sumitomo Metal Industries Ltd. Ibaraki 314 Japan

In recent years, the quality control of sintered ore has become more and more important for stable operation of modern blast furnaces where the sinter ratio of feedstock material exceeds 50%. The quality control system of sintering plant has been developed by SMI (Sumitomo Metal Industries, Ltd.), which consists of the measurement systems of free carbon and FeO content in raw materials, the control system of particle distribution of crushed coke and the FeO content in sintered ore. It's well known that the conventional batch sampling method has such limitations for quality control of sintered ore as its poor sampling frequency and time lag before result is acquired. In the past several years, SMI has developed the sensors and control system of sintered ore with satisfactory results. Our research in those several years, the following results are attained. (1) There is close relation between indices of ROI (Reduction and Disintegration Index) and TI (Tumbler Index) of sintered products and the ratio of smaller particle size of crushed coke than 1 mm. (2) FeO content of products is controllable by regulating the coke ratio in relation to the FeD content of raw materials and products. (3) FeO content can be controlled more accurately by regulating the coke ratio in which the effect of free carbon content of raw materials is corrected. From those facts, the following measurement systems are developed. (1) Continuous FeO measurement meter for raw materials ----- The principle of FeD measurement meter consists in inductance change of detecting coil by the FeD content of raw materials. (2) Continuous FeO measurement meter for sintered products. (3) Particle distribution measurement system of crushed coke ----- This system uses an optical pattern recognition method. (4) Free carbon content measurement system of raw materials ----- This system estimates the total carbon consumption by calculating the data of flue gas volume and components. The recent operation has obtained th

关键词： Sintering plant RDI TI Magnetite Meter Sintered Products Raw Materials Coke Breeze Particle Size Distribution Free carbon content Quality control

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A SUBMARINE control-system TEST VEHICLE

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NAVAL ENGINEERS JOURNAL 1980年第2期92卷 148-155页

作者： SEJD, JJ WATKINSON, KW HILL, WF Mr. James J. Sejd received his B.S. degree in Civil Engineering from Case Western Reserve University and has since undergone considerable graduate study at both The George Washington and American Universities. He served almost four years in the U.S. Navy as a Naval Aviator and enjoys the unique distinction of being qualified in both Heavier- and Lighter-than-Air aircraft. Early in his career he was employed at the Navy's Bureau of Ships in the capacity of a Structural Designer and Structural Research Monitor. In 1966 he joined the Staff of the Center for Naval Analyses where he was involved in the mathematical modeling of ships and aircraft and in economic “trade-off‘ analysis. In 1970. he went to the Naval Ship Engineering Center as an Operations Research Analyst in the Ship Design and Development Division. At the present time he is employed as a Program Manager for the Naval Sea Systems Command Ship Design Research and Development Office. A member of ASNE since 1973 he also is a member of the Association of Scientists and Engineers at NAVSEA the Operations Research Society of America and the Lighter-Than-Air Society. Mr. Kenneth W. Watkinson received both is B.S. and M.S. degrees in Engineering Science from Florida State University in 1970 and 1971 respectively. Since graduation he has been employed at the Naval Coastal Systems Center (NCSC). Panama City. Fla. where he is primarily involved in the investigation of the stability and control of underwater vehicles. For the past four years he has been the Task Leader and Principal Investigator for the NCSC portion of the Advanced Submarine Control Program involved in developing control design methods and the instrumentation system for the Submarine Control System Test Vehicle. Mr. William F. Hill is currently the ASCOP Program Manager at Lockheed Missiles & Space Company (LMSC) Inc. where he has the overall responsibility for design and construction of the Control System Test Vehicle (CSTV). He entered the aircraft industry in England as an Apprentice w

As part of the Advanced Submarine control Program (ASCOP), the Naval Sea systems Command has developed an open water Submarine control system Test Vehicle (CSTV). This vehicle is a 1/12 scale model of an SSN 688 Class Submarine, with provisions for easy geometric changes. Such changes include alternate Sail size and location, the addition of parallel middle-bodies, alternative tail sections, and alternative control configurations. A self-contained instrumentation and control system provides the capability for “on-board” recording of all relevant Submarine-state variables, over the entire speed and depth range, to a degree of data accuracy exceeding any known system. With the means thus available to correlate measured vehicle hydrodynamics with selected maneuvers, conditions, and changes in hull geometry and control surface configuration, modern mathematical techniques for improving submarine equations of motion can be employed to permit dramatic design enhancements in both safety and performance. This paper provides the rationale and history of the development of this vehicle, a description of the instrumentation and control package, and a description of the vehicle itself.

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Recent Computerized Power Generation Plant Automation and Advanced Man-Machine Interface system

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IFAC Proceedings Volumes 1977年第1期10卷 16-20页

作者： K. Fujii N. Takeda Y. Kogure T. Neda H. Kawahara M. Abe Power Generation Control System Engineering Tokyo Shibaura Electric Co. Ltd Fuchu Works Tokyo Japan Control and Instrumentation Department Power Tokyo Shibaura Electric Co. Ltd Tokyo Japan

This paper presents a description of recent computerized power generation plant automation and advanced man-machine interface systems. The automation software system is called COPOS (Computerized Optimum Plant Operation system), and the advanced man-machine interface software system is called PODIA (Plant Operation by Displayed Information and Automation). The authors describe, first of all, practical methods applied to the full automation of a fossil fired power plant by COPOS. For example, there is the fundamental philosophy of plant operation phases separation, sub-control systems separation, modes separation and WCD (Work control Drive). Also described is the COPOS software system, which features the problem oriented language (FILL IN BLANKS) called PLANT TABLES. Lastly, the authors describe the development of the displayed control panel, which makes effective use of many graphic color CRTs for advanced man-machine interface. The fundamental philosophy described in the paper is throughly useful and applicable to other process plants

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A Study of Fast Valving as an Aid to Power system Transient Stability Part I: Some Considerations of control Method for Fast Valving

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IFAC Proceedings Volumes 1977年第1期10卷 1-5页

作者： K. Koyanagi T. Komukai M. Abe Power System Analytical Engineering Section Tokyo Shibaura Electric Co. Ltd. Tokyo Japan Control and Instrumentation Department Power Tokyo Shibaura Electric Co. Ltd. Tokyo Japan

Fast valving could cause second swing instability in a relatively weak system, though it is effective on first swing stability. This paper presents the proposed control methods for fast valving which are concerned with a practical way to control turbine power according to a fault severity and demonstrates their effectiveness by detailed digital simulations performed on a multimachine system.

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