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Midwest Symposium on Circuits and systems (MWSCAS)

作者： T. Miki R. Sugino Y. Kono Department of Electrical and Electronic Engineering Anan National College of Technology Tokushima Japan Department of Systems and Control Engineering Anan National College of Technology Tokushima Japan System Analysis Section System Integration Department Public-Use e-Solution Center Mitsubishi Electric Corporation Limited Kobe Japan

The objective of this paper is to investigate the method which can assess accurately and efficiently the effects of excitation systems on transient stability of power systems. At first, critical fault clearing time functions CCT(W:load) are defined by taking notice of the fact that transient stability is mainly controlled by fault clearing time and load. Next, the method to be enable to assess accurately and efficiently the effects of excitation systems on transient stability has been newly developed by using the above functions. Finally, it has been applied to the effect assessment in the occurrence of a three- phase fault in a model power system. Results of application have been clarified the effectiveness of the developed method.

关键词： Power system transients Power system stability Power system simulation Power generation Power system faults Power system modeling Flowcharts Power system control Power systems Power system analysis computing

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Suppressing shock waves on the A1 in The Netherlands - Model calibration and model-based predictive control

Suppressing shock waves on the A1 in The Netherlands - Model...

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2003 IEEE International Conference on Intelligent Transportation systems, ITSC 2003

作者： Hegyi, A. Duy, D.N. De Schutter, B. Hellendoorn, J. Hoogendoorn, S.P. Stramigioli, S. Delft Center for Systems and Control Delft Univ. of Technology Mekelweg 2 Delft2628 CD Netherlands Transportation Planning and Traffic Engineering Section Fac. Civil Eng. and Geosciences Delft Univ. of Technology P.O. Box 5048 Delft2600 GA Netherlands Control Laboratory EL/CE Fac. of Electrical Eng. Mathematics and Computer Science Univ. of Twente P.O. Box 217 Enschede7500 AE Netherlands

ISBN: (纸本)0780381254

We now apply the model predictive control (MPC) of speed limits that we have presented in previous publications to a calibrated METANET model of a 19 km stretch of the real-world freeway A1 in The Netherlands. This freeway regularly suffers from shock waves originating mainly from on-ramps, and speed limits are now used to suppress these shock waves. First, we calibrate and validate the extended METANET model with data from the A1 freeway, and we use the Delft OD method to estimate the origin-destination patterns that are needed for the simulation of the destination oriented traffic. Next, we verify from data whether the necessary conditions for applying speed limits against shock waves are satisfied. We show that the MPC controller performs well even under the assumption that the traffic demand is not known on the on-ramps and is known for only a few kilometers upstream and downstream of the controlled stretch. This approach results in an improvement of the total time spent in the network with about 15%. © 2003 IEEE.

关键词： Shock waves

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Suppressing shock waves on the A1 in The Netherlands-model calibration and model-based predictive control

Suppressing shock waves on the A1 in The Netherlands-model c...

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International Conference on Intelligent Transportation

作者： A. Hegyi D.N. Duy B. De Schutter J. Hellendoorn S.P. Hoogendoorn S. Stramigioli Delft Center for Systems and Control Delft University of Technnology Delft Netherlands Transponation Planning and Traffic Engineering Section Fac. Civil Engineering & Geosciences Delft University of Technnology Delft Netherlands Control Laboratory. EUCE. Fac. of Electrical Engineering Mathematics & Computer Science University of Twente Enschede Netherlands

关键词： Predictive models Shock waves Calibration Predictive control Traffic control Pollution measurement Artificial intelligence Communication system traffic control Optimal control Vehicle dynamics

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A multi-agent case-based traffic control scenario evaluation system

A multi-agent case-based traffic control scenario evaluation...

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International Conference on Intelligent Transportation

作者： B. De Schutter S.P. Hoogendoorn H. Schuurman S. Stramigioli Delft Center for Systems and Control Delft Univ. of Technology Delft CD The Netherlands Transportation Planning & Traffic Engineering Section Delft Univ. of Technology Delft GA The Netherlands AVV Traffic Research Center Ministry of Transport Public Works and Water Management Rotterdam Netherlands EL/CE Fac. of Electrical Eng. Univ. of Twente AE Enschede The Netherlands

Traffic operators in traffic control centers have various measures at their disposition to control the traffic flows on motorways and on urban roads such as ramp metering, variable speed limits, dynamic route guidance, opening of shoulder lanes, etc. When having to determine which of these control measures have to be applied and where they have to be applied for a given traffic situation, the traffic operator should be able to predict the effect of a control scenario in order to be able to select the best scenario. As on-line, real-time simulation of a large number of possible scenarios is usually not tractable for even relatively small motorway networks, a fast method to predict the effects of control measures on-line is a key requirement for effectively applying traffic control. In this paper we develop a multi-agent case-based approach to assist traffic operators in evaluating or predicting the effects of control measures. The proposed approach is much faster than straightforward traffic simulation so that it can be used for on-line and real-time evaluation of a large number of different control scenarios. In addition, it is scalable so that it can also be used for large networks.

关键词： Traffic control Communication system traffic control control systems Roads Humans Telecommunication traffic Current measurement Geology Laboratories Mathematics

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Human systems integration and advanced technology in engineering department workload and manpower reduction

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NAVAL ENGINEERS JOURNAL 2003年第1期115卷 57-65页

作者： Lively, KA Seman, AJ Kirkpatrick, M KENNETH A. LIVELY graduated from the University of Colorado with a BS in applied mathematics and an MS in mathematics in 1976 and from the Massachusetts Institute of Technology with an MS in electrical engineering and the degree ocean engineer in naval architecture and marine engineering in 1984. He retired from the U.S. Navy in 1989 after 23 years of service. Assignments included electrical officer on the USS Constellation (CV 64) project engineer for the DDG 51 machinery control system (NAVSEA) and DDG 51 Technical Director (NAVSEA). He was vice president of the PDI Division of Bird-Johnson Company from July 1989 to November 1998 where he managed various gas turbine and machinery controls related development projects. He joined Anteon Corporation's Systems Engineering Group as senior controls engineer in December 1998 where he provided technical support to the integrated power systems program (NAVSEA PMS 510) and managed the Office of Naval Research Afloat Laboratory. DR. MARK KIRKPATRICK is currently an independent consultant in human factors and work-load/manning analysis and modeling. He holds a Ph.D. degree in experimental psychology from The Ohio State University and has 34 years of experience in applied human factors. From 1982 through 2000 Dr. Kirkpatrick served as the senior vice president of Carlow International. Prior to joining Carlow in 1982 Dr. Kirkpatrick served as a member of the technical staff at North American Rockwell's Missiles Division and as a project director and vice president for Essex Corporation. His areas of expertise include workload simulation task analysis operator-in-the-loop simulation human performance experimentation statistical analysis and human factors T&E. He has directed and/or participated in human factors projects for the U.S. Navy U.S. Army NASA Department of Transportation the U.S. Nuclear Regulatory Commission and private industry. ANTHONY J. SEMAN III is the technical manager for the reduced ship's crew by virtual presence (RSVP) advanced technology d

Aboard current ships, such as the DDG 51, engineering control and damage control activities are manpower intensive. It is anticipated that, for future combatants, the workload demand arising from operation of systems under conditions of normal steaming and during casualty response will need to be markedly reduced via automated monitoring, autonomous control, and other technology initiatives. Current DDG 51 class ships can be considered as a manpower baseline and under Condition III typical engineering control involves seven to eight watchstanders at manned stations in the Central control Station, the engine rooms and other machinery spaces. In contrast to this manning level, initiatives such as DD 21 and the integrated engineering plant (IEP) envision a partnership between the operator and the automation system, with more and more of the operator's functions being shifted to the automation system as manning levels decrease. This paper describes some human systems integration studies of workload demand reduction and, consequently, manning reduction that can be achieved due to application of several advanced technology concepts. Advanced system concept studies in relation to workload demand are described and reviewed including. Piecemeal applications of diverse automation and remote control technology concepts to selected high driver tasks in current DDG 51 activities. Development of the reduced ship's crew by virtual presence system that will provide automated monitoring and display to operators of machinery health, compartment conditions, and personnel health. The IEP envisions the machinery control system as a provider of resources that are used by various consumers around the ship. Resource needs and consumer priorities are at all times dependent upon the ship's current mission and the availability of equipment pawnbrokers.

关键词： Naval warfare

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Estimation of nonlinear ARX models

Estimation of nonlinear ARX models

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41st IEEE Conference on Decision and control

作者： Zhu, Yucai Control Systems Section Faculty of Electrical Engineering P.O. Box 513 5600 MB Eindhoven Netherlands Tai-Ji Control Grensheuvel 10 5685 AG Best Netherlands

Estimation of some nonlinear ARX models is studied. First the model structures are discussed and their numerical tractability examined. Three NARX models are proposed. Parameter estimation is solved for the three models. A relaxation iteration scheme is proposed by using the model structures in which the error is bilinear-in-parameters. The convergence and consistency of the methods are established. Simulation study will be used to illustrate the method.

关键词： Nonlinear control systems

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Optimal Boiler control through Real-time Monitoring of Unburned Carbon in Fly Ash Using Laser Induced Breakdown Spectroscopy

Optimal Boiler Control through Real-time Monitoring of Unbur...

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Laser Induced Plasma Spectroscopy and Applications, LIBS 2002

作者： Kurihara, Miki Ikeda, Koji Izawa, Yoshinori Deguchi, Yoshihiro Tarui, Hitoshi Power Plant Engineering Department Nagasaki Shipyard and Machinery Works Mitsubishi Heavy Industries Ltd Japan Control and Electrical Systems Engineering Section Power Plant Engineering Department Nagasaki Shipyard and Machinery Works Mitsubishi Heavy Industries Ltd Japan Applied Physics Laboratory Nagasaki Research and Development Center Mitsubishi Heavy Industries Ltd. 5-717-1 Fukahori-machi Nagasaki851-0392 Japan Thermal Power Engineering Sec. Thermal Power Dept. Thermal and Nuclear Power Div. Tohoku Electric Power CompanyInc Japan

ISBN: (纸本)1557527253

A laser induced breakdown spectroscopy (LIBS) technique has been applied to detect the unburned carbon in fly ash, and an automated LIBS unit has been developed and applied in a 1000MW pulverized coal fired power plant for real-time measurement of unburned carbon in fly ash. Good agreement was shown between measurement results from the LIBS method and those from the conventional method(JIS 8815), with a standard deviation of 0.27%. This result confirms that measured unburned carbon in fly ash using LIBS is accurate enough for the boiler control and boiler control in optimized way is possible using the value of unburned carbon content in fly ash. © 2002 OSA/LIBS.

关键词： Laser induced breakdown spectroscopy

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Indoor and outdoor frequency measurements for MM-waves in the range of 60 GHz

Indoor and outdoor frequency measurements for MM-waves in th...

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IEEE Conference on Vehicular Technology (VTC)

作者： D.M. Matic H. Harada R. Prasad Telecommunication & Traffic-Control Systems Group Department of Electrical Engineering Delft University of Technnology Delft Netherlands Broadband mobile communication section Yokosuka Radio Communications research centre Communication Research Laboratory Ministry of Posts and Telecommunications Japan

Using a spectrum analyzer and synthesized signal generator, several measurements for the frequency-domain characterization of the radio channel in the 60 GHz band were performed. In the experiments, a carrier wave (CW) was swept with a constant amplitude across the 100 MHz band, centered around 59.9 GHz. The channel frequency response was measured at the receiver side. The results can be used for the design of an OFDM (orthogonal frequency division multiplex) system. The measurement environments were a corridor and a big college room in a high-rise office building (indoor) and a parking site and a grassfield at the side of that building (outdoor). The spectrum samples were taken in each of the environments. From such samples, it is possible to calculate the Rice parameter k and the path loss coefficients. It was necessary to the develop an appropriate measurement analysis, stemming from the fact that the spectrum analyzer gives no information on the phase, only amplitude. Measurement analysis method and results are explained.

关键词： Frequency measurement Spectral analysis Buildings Signal synthesis Signal generators Frequency domain analysis Performance evaluation Frequency response Receivers OFDM

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A simple adaptive scheme for indirect field orientation of an induction motor

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EUROPEAN TRANSACTIONS ON electrical POWER 1997年第4期7卷 243-249页

作者： Branco, PJC [?]Paulo Jose da Costa Branco (1965) received the B.Sc. and M.Sc. degrees in Electrical Engineering from the Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro/Bnsil in 1988 and 1991 respectively. Since 1992 he has been an Assistant at the Department of Electrical and Computing Engineering Section of Electrical Machines and Power Electronics in the Instituto Superior Tecnico (I.S.T.). He is currently working toward the Ph.D. degree in Electrical Engineering in an application of fuzzy learning theory in the design of “intelligent” electromechanica1 systems. His majorfieldsof interest are Control of Electrical Drives mainly their rncdellization and control using fuzzy logic and neural networks energy conservation and non-linear dynamic systems. In April I992 he joined at Centro de Automictica of Universidade Tecnica de Lisboa (CAUTL) as a researchassistant and in 1993 joined to the Mechatronics Laboratory in the same university. (Instituto Superior TCcnico (I.S.T.) Department of Electrical and Computing Engineering. Section of Electrical Machines and Power Electronics Lisboflortugal Phone: +35 I 1/8417432 Fax: +3511/848 29 87 E-mail: pbranco@alfa.ist.utl.pt)

A self-adaptive scheme is described for automatically tracking the temperature and saturation-dependent rotor time constant T-r in indirect vector control. This method is based on a monitoring signal injected into the process. A cross-correlation function between the monitoring signal and the speed error indicates the T-r changes in direction (increase or decrease) and magnitude. The proposed identification algorithm presents unique characteristics: it does not use current or voltage sensors;it is not motor-parameter dependent;the amplitude of the monitoring signal can be reduced but with an increase on the speed-error sensibility to control interference in drive's performance and it works either on steady-and dynamic transient-state. it will need some load to operate but this condition is satisfied in all practical cases. Tests were conducted with a 1.2 kW four-quadrant AC drive. The adaptive indirect vector-control was implemented in a microcomputer with the motor supplied by a voltage-source inverter with current control using IGBT Experimental and simulated results using this adaptive digital scheme for different loads and values of model T-r(representing a detuned operation) are presented showing good performances.

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Typhon: A weapon system ahead of its time

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NAVAL ENGINEERS JOURNAL 1997年第4期109卷 53-62页

作者： Gussow, M Milton Gussow:is a principal staff engineer at The Johns Hopkins University Applied Physics Laboratory where he is involved in joint warfare analysis and engineering systems assessment. He is a distinguished graduate of the U.S. Naval Academy (1949) and holds a B.S.E.E. degree from the Naval Postgraduate School (1956) and an M.S. degree from M.I. T. (1957). He retired in 1967 as a commander in the US. Navy having served in surface combatants and as a weapons engineering specialist. He had tours at the Bureau of Naval Weapons as section head of the Typhon Weapon Control System Office of Naval Research as the Guided Missile and Astronautics officer and at headquarters Naval Material Command as the ordnance logistics officer He was senior vice president for product development at the McGraw-Hill Continuing Education center Mr Gussow is the author of a McGraw- Hill textbook on basic electrical engineering circuits and techniques. He has taught courses in electrical engineering and operations research at The George Washington University The American University and the School of Advanced international Studies at TheJohns Hopkins University. Mr Gussow is the director of the Systems Assessment Group for the Strike Surface and Antiair Warfare Committee of the National Security Industrial Association (NSIA). He is the author of more than seventy-five technical papers and monographs and his interests include multiwarfare analysis wargaming information management and international relations. He is a member of Sigma Zi Sigma Gamma Tau ASNE and IEEE. Mr. Gussow is listed in Who's Who in Science and Engineering and in American Education for 1996–1997.

A popular question posed is, ''Where did the Aegis weapon system come from?'' Like any system, it had to have a beginning. This article purports to describe a predecessor system called Typhon, that contributed essentially to the successful development of Aegis. The story began in the late 1950s. Typhon was conceived by the Navy as an integrated weapon system to defeat the air threats of the 1970s. It consisted of: 1) a single radar system for search, acquisition, tracking, and missile guidance with multiple beams and instantaneous beam switching, able to operate in the presence of heavy countermeasures;2) a single weapon direction system to handle two complementary missile types, capable of handling multiple intercepts and integrated with the Naval Tactical Data System/Combat Information Center;3) a long-range and medium-range missile;and 4) launching systems for missiles. The heart of the system was the multifunction Typhon radar, which represented a quantum leap in beam forming and switching and signal processing techniques. Contract work for the development, fabrication, and test of the Typhon radar and missile began in 1960 and lasted until 1965. This article recounts the personal experiences of the author during those exciting and innovative years in the development of Typhon.

关键词： Marine missiles

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