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Decision-aid system for survivability of damaged conventional military submarines

NAVAL ENGINEERS JOURNAL 2002年第4期114卷 21-30页

作者： Lee, D Lee, J Lee, KH DONGKON LEE has served as a research engineer in Korea Research Institute of Ships and Ocean Engineering(KRISO)/KORDI for 19 years. He obtained his Ph.D in naval architecture at Pusan National University Korea in 1995. His current research interests include artificial intelligence maritime safety damage survivability evacuation and computer simulation. He is a member of the American Society of Naval Engineers Society of Naval Architects of Korea Korea Information Science Society and Korea Intelligent Information System. JAEYONG LEE has served as an engineering duty officer a commander in Korea Naval Sea Systems Command for 20 years. He graduated from Korea Naval Academy in 1979 with a bachelor of science degree in electric engineering. He received a master of engineering degree in industrial engineering from Yeonse University in 1997 and a master of engineering degree in naval architecture from Chungnam National University in 2000. His current research interests include design and safety of submarine. KYUNG-HO LEE has served as a research engineer in Korea Research Institute of Ships and Ocean Engineering(KRISO)/KORDI for 11 years. He obtained his Ph.D in naval architecture at Seoul National University in 1998. His current research interests include artificial intelligence maritime safety and concurrent engineering. He is a member of the Society of Naval Architects of Korea

AEven small leakage in submarines can lead to serious consecutive damage, since they operate under high water pressure. Such leakage including damage to piping and the bull eventually result in human casualties and loss of expensive equipment as well as the loss of combat capabilities. In such cases, a decision-making system is necessary to respond immediately to the damage in order to maintain the safety or the survival of the submarine. So it is necessary to have an automatic system that can generate responses and give advice to the operator on bow to make decisions to maintain the survivability of the damaged vessel. In this paper a knowledge-based decision support system for submarine safety is developed. The domain knowledge is acquired from submarine design documents, design expertise, and interviews with operators. The knowledge consists of responses regarding damage of the pressure bull and piping systems. Expert elements are deduced to obtain the decision from the knowledge base, and the system makes recommendations on bow to cope with damage to the bull and piping and whether the submarine should stay in the sea or to surface. It is demonstrated that the developed system is well simulated to the real situation through sample applications.

关键词： Submarines

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Abnormal failure mechanism of the asymmetrical emitter turn-off thyristor in high-frequency converters

Abnormal failure mechanism of the asymmetrical emitter turn-...

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

作者： Z. Xu K. Motto A.Q. Huang Center for Power Electronics System The Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA Power/Control Systems Northrop Grumman Corporation Sykesville MD USA

The emitter turn-off thyristor (ETO) is a new MOS-controlled thyristor that is suitable for use in high-power converters due to its improved switching performance and easy control. This paper analyzes the abnormal failures related to the parasitic diode of the ETO in high-frequency converters for the first time. To prevent this failure, several solutions are proposed and improved ETOs are developed. Experimental results show that the proposed solutions can properly solve this problem.

关键词： Failure analysis Thyristors Anodes P-i-n diodes Switches Control systems MOSFETs Tail Switching loss Cathodes

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Design approach for biomedical smart sensors

Design approach for biomedical smart sensors

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Midwest Symposium on Circuits and systems (MWSCAS)

作者： R.L. Ewing H.S. Abdel-Aty-Zohdy Air Force Research Laboratory Inforamation Directorate Adjunct Professor Department of Electrical and Computer Engineering Air Force Institute of Technology USA Microelectronics System Design Laboratory Department of Electrical and Systems Engineering Oakland University Rochester MI USA

ISBN: (纸本)078037150X

system-on-Chip solid state circuits that sense, receive, transmit, and process signals are the sensors, or eyes and ears, of the medical field of the millennium. The goal and design of the system-on-Chip (SOC) program for industry will be to provide affordable, reproducible, and reliable front-end instrumentation, components and subsystems for medical systems. To process/store/analyze the signals acquired from these medical sensors, analog/digital systems are used to provide data fusion and information extraction. These biomedical smart sensors cover the hybrid domains of mixed-technology (electrical, mechanical, optical, thermal, biochemical) and mixed-concept (electrical, control, digital signal processing). These significant domain design differences impose robust design challenges for medical sensor technology.

关键词： Intelligent sensors Biosensors system-on-a-chip Signal processing Sensor systems Mechanical sensors Solid state circuits Eyes Ear Instruments

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High frequency operation of a megawatt voltage source inverter equipped with ETOs

High frequency operation of a megawatt voltage source invert...

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Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： K. Motto Yuxin Li Zhenxue Xu A.Q. Huang Power Control Systems Northrop Grumman Corporation Sykesville MD USA Power Managemen Analog Devices Inc.orporated San Jose CA USA Center for Power.Electronics System The Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA

ISBN: (纸本)0780366182

The fast switching speed, snubberless turn-off capability and voltage controlled turn-off property enable the emitter turn-off (ETO) thyristor the capability of high switching frequency-about 5-10 times as high as its GTO counterpart. A one-megawatt ETO-based voltage source inverter system is constructed with a switching frequency up to 3-5 kHz. Experimental results have shown that the ETO is a promising device for use in high frequency systems.

关键词： Voltage Inverters Thyristors Switching frequency Power semiconductor switches Snubbers Energy management Power system management Power conversion MOSFETs

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C4ISR architectures: I. Developing a process for C4ISR architecture design

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systems engineering 2000年第4期3卷 225-247页

作者： Levis, Alexander H. Wagenhals, Lee W. System Architectures Laboratory C3I Center MSN 4D2 George Mason University Fairfax VA 22030 United States Department of Electrical Computer and Systems Engineering C3I Center System Architectures Laboratory United States Institute of Electrical and Electronic Engineers (IEEE) Advancement of Science (AAAS) United States Center of Excellence Command Control Communications and Intelligence George Mason University Fairfax VA United States System Architectures Laboratory United States

The C4ISR Architecture Framework document issued by the Department of Defense specifies three views of an information architecture and defines a set of products that describe each view. These architecture views are to serve as the basis for C4ISR system development and acquisition. The Framework does not provide a process for architecture design. In this paper, information architectures are described in the context of Structured Analysis, and then the architecture views of the Framework and the related products are interpreted in that context. A methodology for architecture design is developed that is then implemented using Structured Analysis and object orientation in two companion papers. © 2000 John Wiley & Sons, Inc.

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Effect of sensor fusion for recognition of emotional states using voice, face image and thermal image of face

Effect of sensor fusion for recognition of emotional states ...

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IEEE International Workshop on Robot and Human Communication (ROMAN)

作者： Y. Yoshitomi Sung-Ill Kim T. Kawano T. Kilazoe Department of Computer Science and Systems Engineering Miyazaki University Nishi Miyazaki Japan Department of Gerontechnology National Institute for Longevity Sciences Obu Aichi Japan Department of Information System Technosystem Kyushu Kitakyushu Japan

A new integrated method is presented to recognize the emotional expressions of human using both voices and facial expressions. For voices, we use such prosodic parameters as pitch signals, energy, and their derivatives, which are trained by hidden Markov model for recognition. For facial expressions, we use feature parameters from thermal images in addition to visible images, which are trained by neural networks for recognition. The thermal images are observed by infrared ray which is not influenced by lighting conditions. The total recognition rates show better performance than that obtained from each single experiment. The results are compared with the recognition by human questionnaire.

关键词： Sensor fusion Emotion recognition Face recognition Image recognition Speech recognition Skin Humans Virtual reality Layout Discrete cosine transforms

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ANN-based pattern recognition technique for power system security assessment

ANN-based pattern recognition technique for power system sec...

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International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT)

作者： W.P. Luan K.L. Lo Y.X. Yu Brunel Institute of Power Systems Department of Electronics & Computer Engineering Brunei University Uxbridge UK Power System Research Group Department of EEE University of Strathclyde Glasgow UK Electric Power and Energy Research Institute Tianjin University TJU Tianjin China

Security assessment is to predict a power system's ability to withstand a set of next contingencies. An ANN-based pattern recognition method is used to perform static security assessment for power systems due to its potential in terms of speed and accuracy for online application. With the input pattern for ANN be composed of power system pre-contingency state described in busbar power injections (P, Q), the output pattern of ANN is composed of the performance index (PI) values of power system post-contingency state to a list of next contingencies. So the output vectors of ANN will indicate not only either 'secure' or 'insecure' state of the current system but also the severity of security limit violations under contingencies. To cope with the curse of dimensionality and improve efficiency of ANN, R-ReliefF algorithm is introduced to extract those variables that are with more discriminatory information from (P, Q) set to realise the nonlinear mapping from input space to output space. The proposed algorithm is tested on a 77-busbar practical power system with promising results.

关键词： Pattern recognition Power system security Artificial neural networks Power system analysis computing Power system modeling Information security Performance analysis Data mining system testing Steady-state

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Frequency domain subspace model identification using the w -operator

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IFAC Proceedings Volumes 1999年第2期32卷 3986-3991页

作者： Zi-Jiang Yang Kiyoshi Wada Faculty of Computer Engineering and System Science Kyushu Institute of Technology Iizuka Fukuoka 820-8502 TEL+81-948-29-7672 FAX+81-948-29-7651 Japan Department of Electrical and Electronic Systems Engineering Graduate School of Information Science and Electrical Engineering Kyushu University Hakozaki Fukuoka 812 Japan

This paper proposes an efficient and convenient approach to frequency domain subspace identification for continuous-time systems. In the case of continuous-time models, the data matrices often become ill-conditioned if we simply rewrite the Laplace operator s as s = jw where w denotes the frequency. To avoid the ill-conditioned problem, the operator w = ( s - b.α)/( s + b.α) is introduced such that the system can be identified based on a state-space model in the w -operator. And then the estimated w -operator state-space model can be transformed back to the common continuous-time state-space model. An instrumental variable matrix in the frequency domain is also proposed to obtain consistent estimate in the presence of measurement noise.

关键词： Subspace model identification frequency domain continuous-time system w -operator Instrumental variable

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Definition of evaluation criteria for system development acquisition modeling and simulation

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NAVAL ENGINEERS JOURNAL 1999年第1期111卷 55-64页

作者： Leite, MJ Mensh, DR Michael J. Leite:is a Principal Engineer with PRC Inc. a division of Litton Industries. He supports combat system engineering for theater air and missile defense. His other tasks have included the command and control for the AEGIS shipbuilding program systems engineering for the 21st Century Surface Combatant combat system survivability and the development of NATO standardization agreements for naval ordnance. He was previously a Senior Engineer with San Diego Gas & Electric with responsibility for its energy application and lighting programs. Prior to joining SDG&E Mr. Leite was a commissioned officer in the U.S. Navy where he served in operations and engineering assignments. Following active duty he accepted a Naval Reserve commission and has retired with the rank of Captain. His assignments included command operational and engineering tours. Mr. Leite has also served as an expert witness in admiralty and engineering matters. He is a gradate of the University of California Berkeley with a Bachelor of Science Degree in Engineering and also holds a Masters Degree in Business Administration from National University in San Diego. Mr. Leite is a Registered Professional Engineer in the States of California and Minnesota. Mr. Leite is a member of ASNE ASCE MORS the Illuminating Engineering Society and the U.S. Naval institute. Dennis Roy Mensh:is a Senior Engineer with PRC Inc. a division of Litton Industries in Crystal City VA where he supports modeling and simulation tasking for combat systems. He received BS and MS degrees in applied Physics from Lopola College in Baltimore MD and the American University in Washington DC. He has also completed the course work towards a Ph.D. degree in computer science specializing in the fields of Operations Reseurch Anabsis Systems Analysis and Computer Modeling and Simulation. Previously he was employed at the White Oak Laboratory of the Naval Surface Warfare Carter in Silver Spring MD where he worked in the areas of naval sensor and weapon system analysis

This paper defines, develops and examines a set of generic analysis tools that can be applied to Models and Simulations at the systems engineering level of fidelity. The tools examine the performance and effectiveness of Sensors;Weapons;and Battle Management, Command, Control, Communications, computers, and Intelligence ((BMCI)-I-4) systems and equipment. The Measures of Performance (MOPs), Measures of Effectiveness (MOEs) and Measures of Force Effectiveness (MOFEs) were extracted from the Modular Command and Control Structure Paradigm which was developed at the Naval Postgraduate School. The paradigm provides for the development of evaluation criteria (MOPs, MOEs, and MOFEs) in a framework that ensures the traceability of system performance and effectiveness to the system operational requirements as specified in the Operational Requirements Document (ORD). Also, the analysis tools provide insight and valid estimates of numerical measures of the defined system functionality threads, which represent the system's operational requirements as specified in the ORD. The tools are directly transferrable and applicable to test and evaluation exercise events which are conducted in support of the development and acquisition of systems and equipment. Once the levels of system performance have been defined, the Paradigm generates a quantitative database that becomes a useful tool in system tradeoffs and selection. Once the alternative system suites have been defined, the suites can be analyzed in terms of system functionality threads and their corresponding performance capabilities versus cost.

关键词： Naval vessels

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Acquisition of the enhanced Maritime Prepositioning Force, MPF(E), Ship

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NAVAL ENGINEERS JOURNAL 1999年第1期111卷 15-26页

作者： Mazumdar, T Sandison, J DuFlocq, R Thpan Mazurndar:is a Deputy Ship Design Manager from Naval Surface Warfare Center Carderock Division. He was the Design Manager for the Engineering and Design Phase ofthe Enhanced Maritime Prepositioning Fme Ship (MPF(E)). Cuwently Mt: M2.zumdar is Deputy Ship Design Manager in NAVSEA 030 for the LHD and LSD classes of ships. Mr. Mazumdar was awarded a BSE in Naval Architecture and Marine Engineering from the University of Michigan in 1981 and an MS in Computer Science fiom Virginia Tech in 1988. He also possesses an International ChiejEngineer License (Motot unlimited). Mr. Mancmdar has been an Associate Member of WAME since 1981. James C. Sandison:is a Senior Ship Design Manager (SDM) for surface ships in the Nawl Sea Systems Command (NAVSEA03D3C). He has a long tem practical background in design construction and testing of surface ships. Starting in NAVSEC as a diving and salvage systems engineer for the Bathyscaph TRIESTE he has been involved with most ofthe Nays Mine Warfare and Auxiliary ships from naval architect to the present Senior Ship Design Manager for the Strategic Sealift Program. Mr: Sandison entered the U.S. Navy in 1956 in the (diesel) Submarine Service. Afterward he “went to sea in sailing ships and completed an apprenticeship as a wooden shipbuildex. In 1971 he graduated from the University of Michigan with a BSE in Naval Architecture and Marine Engineering and was employed by NAVSEC. His latest additional duties have been as engineering coordinator on board the USS CONSTITUTION for her 200th anniversary sail. Mr. Sandison is a member of SNAME ASNE and the U.S. Naval Institute. Rick DuFlocq has over 24 years of combined project management mechanical system and general awangmmt design and design documentation experience the last 14 years urith Advance Marine Enterprises (AME). He has fmjmned this wurk on a wide variety of ships and auxiliary crafl including submarines primarily for the U.S. Navy and the Military Sealift Command (MSC). He has worked for both shiprards and marine eng

The paper will describe the streamlined acquisition process involved in the procurement, and conversion, of the first two of three Enhanced Maritime Prepositioning Force (MPF(E)) ships. This program was one of the first programs undertaken within the Government's new policy of Acquisition Reform, which resulted in the development of "performance based" requirements for these ships. This program is notable in that one prime contractor is responsible for the accomplishment of all phases, and that the contractors participating were not shipyards as is usually the fashion for Government ship acquisition programs. Also of note, was that after the conversion contracts were awarded, responsibility for the conduct of detail design, conversion, and operation and maintenance of the ship was transferred from the NAVSEA Sealift Program Office (PMS 385) to the Military Sealift Command (MSC). The first part of the paper will describe the basic mission of the MPF(E) ships, and a description of the origin of the program requirements. The second part of the paper will chronicle in detail the portions of the engineering design and specification development process, which will include descriptions of the unique digital data recording and tracking systems developed by the Government MPF(E) Design Support Team to support the acquisition phases of the procurement. The third and final part of the paper will elaborate on the conversion contract awards and the transition of the program from PMS 385 to MSC.

关键词： Naval vessels

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