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A SHEWHART-LIKE CHARTING TECHNIQUE FOR HIGH-YIELD PROCESSES

QUALITY AND RELIABILITY engineering INTERNATIONAL 1995年第3期11卷 189-196页

作者： XIE, W XIE, M GOH, TN Department of Industrial and Systems Engineering National University of Singapore 10 Kent Ridge Crescent Singapore 0511 M. Xie:graduated from Royal Institute of Technology in Stockholm Sweden and received an M.Sc. in 1984. He received a Licentiate and a Ph.D. from Linkoping University Sweden in 1986 and 1987 respectively. After four years doing active research and teaching at that university he became one of the first recipients of the LKY fellowship in 1991 tenable at the National University of Singapore. Currently he is working as a senior lecturer. Dr. Xie has published more than 50 papers internationally and a bookSoftware Reliability Modellingby World Scientific Publishers. A member of IEEE ASA and SRE Dr. Xie has also been a committee member of a few international conferences. W. Xie:graduated from Xi'an Jiaotong University in 1989 with a Bachelor's degree and an M.Sc. degree in 1992. After working at Digital Equipment Corporation Shenzhen China for about a year she was awarded a scholarship to pursue postgraduate degree at National University of Singapore. She has been doing research on statistical process control techniques since then.

A Shewhart-like charting technique is developed in this paper to overcome the difficulties the traditional control chart encounters in the control of processes with a very low fraction non-conforming. The technique uses the number of conforming items between two consecutive non-conforming ones to monitor the fraction non-conforming of a process, leading to a chart that is informative and easy to interpret. The approach discussed is especially suitable for real-time and automatic statistical quality control.

关键词： STATISTICAL PROCESS control HIGH YIELD PROCESSES CONFORMING RUN LENGTH CHART FOR ATTRIBUTES

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ON A METHOD OF CRYPTANALYSIS FOR CRYPTOSYSTEM WITH INVOLUTION

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ELECTRONICS AND COMMUNICATIONS IN JAPAN PART III-FUNDAMENTAL ELECTRONIC SCIENCE 1995年第5期78卷 1-11页

作者： TSUNOO, Y OKAMOTO, E UEMATSU, T Member NEC Software Hokuriku Ltd. Ishikawa Japan 920-21 School of Information Science Japan Advanced Institute of Science and Technology Ishikawa Japan 923-12 Members Tomohiko Uyematsu graduated in Electrical Engineering from Tokyo Institute of Technology in 1982 and received a Master's degree from the same university in 1984 after whichhe became an assistant in the Electrical and Electronics Engineering Department there. In1990 he became a Lecturer and in 1991 an Assistant Professor. In 1992 he became Assistant Professor at the School of Information Science Japan Advanced Institute of Science and Technology. He holds a doctorate in engineering. Among his research interests are signal theory optical communications theory coding theory and data compression algorithms. In 1988 he received a Shinohara Commemorative Science Encouragement Prize and in 1992 a Best Paper Award. He is the author of the bookIntroduction to Record Data Compression Algorithms. He is a member of the Measurement Control Society and the Society for Information Theory and Its Applications.

Cryptology provides the technological basis for guaranteed network security. In the field of business, to guarantee the security of information, everyone needs easy-to-use cryptology. Starting with the announcement by the U.S. National Bureau of Standards of the DES cryptosystem and the proposal by NTT of the FEAL cryptosystem, secret-key cryptographic algorithms have been published, involution-type block cryptosystems which use secret key to encipher 64 bits of plain text as 64 bits of cipher text [2, 3, 9, 10, 12]. NTT has proposed the one-way function MAP, which is also an involution-type transform. In this paper, we study a new cryptanalytic method for involution-type cryptosystems and show by example that it can be applied practically in a ciphertext-only attack on the one-way function MAP. For an involution-type cryptosystem, by increasing the amount of construction in the data-randomization phase and by increasing the size of the secret key, we can guarantee the computational security by preventing the estimation of the secret key. However, if we study the properties of the function used in the design of the data-randomization phase, by specifying input/output values of the function which are independent of the secret key, it may be possible to use the inverse function [11] to calculate the secret key. This method is called the intermediate cipher method. The intermediate cipher method differs from previous methods in the small quantity of data required for breaking.

关键词： INVOLUTION BLOCK CIPHER INTERMEDIATE CIPHER CIPHERTEXT-ONLY ATTACKS

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FDTD ANALYSIS OF CROSSTALK IN MULTILAYER PRINTED-CIRCUITS

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INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1994年第3期7卷 209-221页

作者： CERRI, G DELEO, R PRIMIANI, VM SCHIAVONI, A Dipartimento di Elettronica ed Automatica Università di Ancona Via Brecce Bianche 60131 Ancona Italy Graziano Ceni was born in Ancona Italy in 1956. He received the degree in electronic engineering from the University of Ancona in 1981. Since 1983 after military service in the Air Force Engineer Corps he has been a Researcher with the Department of Electronics and Automatics at the University of Ancona. His research is mainly devoted to microstrip antennas and integrated optics. Currently he is also involved in EMC problems and in the analysis of the interaction between electromagnetic fields and biological bodies. Roberto De Leo was born in Ban Italy in 1942. He graduated from the Politecnico di Torino in 1965. From 1966 to 1980 he was at the University of Bari working on microwave devices. Since 1980 he has been a full Professor of E\ectromagnetics at the University of Ancona. His areas of interest are medical applications of electromagnetic waves and electromagnetic compatibility. Valter Mariani Priiani was born in Rome Italy in 1961. Since 1981 he has been a laboratory researcher at the University of Ancona. He received the degree in electronic engineering at the University of Ancona in 1990 his area of interest concerns microwave patch antennas medical applications of electromagnetic waves and electromagnetic compatibility. Now he is responsible for the EMC laboratory. Andrea Schiavoni was born in Jesi Italy in 1963. He received the degree in electronic engineering from the University of Ancona in 1990. At present he is a Ph.D. student in the Department of Electronics and Automatics University of Ancona. His research interests are numerical modelling in electromagnetic compatibility and the interaction of electromagnetic fields and biological bodies.

A theoretical analysis has been developed to study the crosstalk in crossed bundles of parallel lines. The model is based on the theory of the coupled transmission lines and the resulting system of differential equations has been solved by means of the finite difference, time-domain (FDTD) method. The frequency response of the network has been achieved by the discrete fourier transform (DFT) algorithm;measurements, performed with a vectorial network analyser, show a good agreement with numerical simulation.

关键词： Crosstalk

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BROAD-BAND ISLAND INTERCONNECTION VIA SATELLITE - PERFORMANCE ANALYSIS FOR THE RACE-II CATALYST PROJECT

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INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS 1994年第3期12卷 223-238页

作者： HADJITHEODOSIOU, MH KOMISARCZUK, P COAKLEY, F EVANS, BG SMYTHE, C Centre for Satellite Engineering Research University of Surrey Guildford GU2 5XH U.K. Obtained an M.A. in Electrical and Information Sciences from the University of Cambridge in 1989 and an M.S. in Electrical Engineering from the University of California Irvine in 1991. He is currently a Research Fellow at the Centre for Satellite Research University of Surrey U.K. His research interests include multiple access protocols for VSAT networks voice/data integration in low-bit-rate networks and the use of satellites for the provision of BISDN services. Obtained a B.Sc. in Pure and Applied Physics with Electronics in 1983 and an M.Sc. in Modern Electronics in 1984 from the University of Nottingham U.K. He was a project engineer on the Corporate Data Network for the Central Electricity Generating Board U.K. and then a senior lecturer in communication systems at the University of Greenwich UK. At present he is working on his Ph.D. at the Centre for Satellite Engineering Research (CSER) University of Surrey on the performance of communication systems. Has been Senior Lecturer in the Department of Electrical Engineering University of Surrey since 1984. She is the author (or joint author) of more than 80 research papers. Currently she teaches courses in Telecommunication Networks and Computer Architecture. Her research interests include on-board processing for satellites protocols and performance issues. Received the BSc. and Ph.D. degrees in Electrical Engineering and Microwave Systems from the University of Leeds in 1965/1968. He was British Telecom Lecturer-Reader in Telecommunications Systems at the University of Essex from 1969–1983. In 1983 he was appointed to the Alec Harley Reeves Chair of Information Systems Engineering at the University of Surrey and in 1990 became the first Director of the post-graduate centre for Satellite Engineering Research which houses some 100 researchers. In 1992 he was made a Fellow of the Royal Academy of Engineers in the U.K. and is a Fellow of IEE and a member of IEEE

The use of communication satellites as a possible way of offering broadband island interconnectivity appears to be a very attractive option, as it will enable the provision of an all-digital, transparent service to a number of ATM islands spanning a wide area, accommodating efficiently a variety of traffic demands. The CATALYST Project (RACE II/R2074) is an attempt to demonstrate the applicability and compatibility of satellite technology with the terrestrial BISDN. In this paper we present an overview of the project and focus on an initial study of the expected user performance through the CATALYST network. Our analysis is based upon mathematical and simulation models and describes the end-system to end-system transfer delay for given message lengths. The protocol profiles assume a mix of Novell NetWare and Network File System client/server architectures, which are supported by either the IEEE 802.3/Ethernet or fibre distributed data interface LANs, which are themselves linked via LAN/ATM/satellite interface units. Areas of further investigation, and the implication of our analysis on the actual network architecture, are discussed.

关键词： ASYNCHRONOUS TRANSFER MODE (ATM) BROAD-BAND ISDN SATELLITE COMMUNICATIONS

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MAIN PROPULSION POWER TAKE-OFF CONFIGURATION FOR AN ETC GUN PULSED-POWER GENERATOR

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NAVAL ENGINEERS JOURNAL 1994年第3期106卷 52-58页

作者： PETTERSEN, KE BIELITZ, CL CIANCI, J Kenneth E. Pettersen:graduated from the University of Maryland Baltimore County in J 978. He is a mechanical engineer in the power systems directorate of the Annapolis Detachment Carde-rock Division Naval Surface Warfare Center (formerly David Taylor Research Center) and has been with the Department of the Navy since 1981. Mr. Pettersen worked for the Naval Sea Systems Command from May 1981 until June 1985. He has been employed with NSWC Annapolis Detachment since June 1985. Charles L. Bielitz:is a mechanical engineer in the mechanical transmissions branch of Annapolis Detachment Carderock Division Naval Surface Warfare Center where he has worked for the past six years. He received his BSME from Virginia Polytechnic Institute in 1981. Prior to joining NSWC Annapolis he was employed by the General Electric Company in the medium steam turbine department. John Cianci:received his ASME from Tufts University in 1958 and his BSME from Tufts University in 1962. Mr. Cianci joined General Electric in 1954. He has thirty-seven years of experience in design manufacturing testing installation and customer support of high speed high power industrial marine and Navy gearing bearings couplings and lube systems. His experience includes positions of both engineer and manager in the areas of gear design gear products quality control and gear manufacturing engineering he is currently technical leader Gear Development Programs. He is a member of the American Gear Manufacturers Association and is on the Marine and High Speed Gearing committees.

Electro-Thermal Chemical (ETC) Gun technology will increase the range and capabilities of existing CIWS and 5 inch guns. Because of their faster, yet more controllable acceleration, ETC guns will allow for the utilization of smart munitions and, in the case of the 5 inch guns, increase range to beyond 50 nautical miles. This paper examines five power take-off (PTO) gear configurations from a surface ship class main reduction gears (MRG's) which drive a nominal 10 Megawatt (MW) Pulsed Power (PP) generator. The PP generator is utilized to charge a capacitor-based pulsed forming network (PFN) which, in turn, provides an electrical pulse to the cartridge of a munition at the breech of an ETC gun upon demand. The PTO gear and resultant placement of the generator will be the major focus of this paper. Major issues that will be examined will include space constraints within the main engine and auxiliary machinery rooms, gear sizing, survivability, shock and vibration, the penetration of watertight bulkheads with high speed shafting and equipment accessibility. Also, design guidelines for the PP generator will be provided. Special emphasis will be placed on the connection of the PTO gear to the MRGs.

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USING VIRTUAL ENVIRONMENTS IN THE DESIGN OF SHIPS

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NAVAL ENGINEERS JOURNAL 1994年第3期106卷 91-106页

作者： JONS, OP RYAN, JC JONES, GW Otto P. Jons:received a Diplom Ing. in shipbuilding from the Technical University of Hanover W. Germany and an MS in naval architecture and marine engineering from MIT. He then joined Litton Ship Systems where he was responsible for the preliminary design of the DD-963 hull structure and then for ship system integration as manager LHA ship systems engineering department. From 1972 to 1974 he was the principal research scientist at Hydronautics. In 1974 as technical director he helped establish the Crystal City office of Designers and Planners. Mr. Jons was one of the co-founders of Advanced Marine Enterprises Inc. in 1976 where he serves as corporate vice president engineering. J. Christopher Ryan:earned his bachelors and masters degrees in naval architecture from Webb Institute and MIT respectively. He spent three years at the advanced marine technology division of Litton Industries working on the DD-963 class ship design and related computer aided design projects. He subsequently went to the Navy Department concentrating on early stage design of surface combatants for twelve years including work on the FFG-7 Sea Control Ship CSGN and CVV aircraft carrier projects. He then shifted focus and became the Technical Director for the Computer Supported Design Program in NavSea for five years. Mr. Ryan has served in several supervisory positions within the Ship Design Group in NavSea since that time. He is currently the director of the future ship concepts division. Gary W. Jones:graduated from the University of Tennessee in 1971 with a BS in mechanical engineering and followed up with graduate work at George Washington University and the University of Maryland. Mr. Jones was with the Naval Sea Systems Command from 1971 until 1988 where he was a naval architect in the submarine section of the hull form design division. In 1988 he was detailed to the Defense Advanced Research Projects Agency (DARPA) where he became the program manager for the advanced submarine technology program's hydrodynamic hydroac

A major contributor to the expense and length of time to design, build, and test new systems has been the need to build and test hardware prototypes to determine their effectiveness in meeting operational requirements. Recent and dramatic advances in computer simulation technologies hold forth the promise of revolutionizing design and acquisition strategies by providing the means to validate end users' requirements prior to hardware construction. By designing and operationally testing virtual prototypes in a virtual environment, these technologies will soon offer naval architects the ability to build and launch ships in computer-based cyberspace in lieu of the shipbuilder's ways. The authors of this paper provide the background for these developments, explore the significance and ramifications of these technologies to the current process of ship and system design, outline challenges lying ahead, and present their vision and recommendations for future development.

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HYDROCARBON VAPOR DIFFUSION IN INTACT CORE SLEEVES

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GROUND WATER MONITORING AND REMEDIATION 1993年第1期13卷 139-150页

作者： OSTENDORF, DW MOYER, EE XIE, YF RAJAN, RV David W. Ostendorf (Civil Engineering Department University of Massachusetts Amherst MA 01003) is an associate professor in the Environmental Engineering Program of the Civil Engineering Department of the University of Massachusetts at Amherst. His research interests include unconfined aquifer contamination hazardous waste site remediation and analytical modeling of problems in environmental fluid mechanics. Ostendorf is a Registered Professional Engineer in Massachusetts and a member of the American Geophysical Union American Society of Civil Engineers Soil Science Society of America Water Pollution Control Federation and Association of Environmental Engineering Professors as well as the National Ground Water Association. Ellen E. Moyer (Civil Engineering Department University of Massachusetts Amherst MA 01003) is a doctoral candidate in the Environmental Engineering Program of the Civil Engineering Department of the University of Massachusetts at Amherst with an M.S. degree in environmental engineering from that institution. Her research interests include subsurface investigation soil venting bioremediation and analytical modeling of subsurface contamination. She has six years of professional experience managing hazardous waste site investigation and cleanup projects and is a member of the National Ground Water Association and the American Society of Civil Engineers. Yuefeng Xie (Civil Engineering Department University of Massachusetts Amherst MA 01003) is a postdoctoral research associate in the Environmental Engineering Program of the Civil Engineering Department of the University of Massachusetts at Amherst. His research interests include environmental analyses drinking water treatment and the chemical characterization and removal of disinfection by-products. A graduate with a Ph.D. and an M.S. in environmental engineering and a B.S. in chemistry and chemical engineeering from Tsinghua University Beijing China Xie is a member of the American Water Works Association and the Water Poll

The diffusion of 2,2,4-trimethylpentane (TMP) and 2,2,5-trimethylhexane (TMH) vapors out of residually contaminated sandy soil from the U.S. Environmental Protection Agency (EPA) field research site at Traverse City, Michigan, was measured and modeled. The headspace of an intact core sleeve sample was swept with nitrogen gas to simulate the diffusive release of hydrocarbon vapors from residual aviation gasoline in and immediately above the capillary fringe to a soil-venting air flow in the unsaturated zone. The resulting steady-state profile was modeled using existing diffusivity and air porosity estimates in a balance of diffusive flux and a first order source term. The source strength, which was calibrated with the observed flux of 2,2,4-TMP leaving the sleeve, varied with the residual gasoline remaining in the core, but was independent of the headspace sweep flow rate. This finding suggested that lower soil-venting air flow rates were in principle as effective as higher air flow rates in venting LNAPL vapors from contaminated soils. The saturated vapor concentration ratio of 2,2,4-TMP to 2,2,5-TMH decreased from 6.6 to 3.5 over the duration of the experiments in an expression of distillation effects. The vertical profile model was tested against sample port data in four separate experiments for both species, yielding mean errors ranging from 0 to -24 percent in magnitude.

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ELECTRONIC BAND-STRUCTURE FOR 2-DIMENSIONAL PERIODIC LATTICE QUANTUM CONFIGURATIONS BY THE FINITE-ELEMENT METHOD

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INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1993年第4期6卷 283-297页

作者： FERRARI, RL Cambridge University Engineering Department Trumpington Street Cambridge CB2 1PZ U.K. Ron Ferrari graduated in mathematics from Imperial College of Science and Technology London University in 1950 and was awarded the Diploma of Imperial College in 1951. After service in the Royal Air Force as a technical signals officer he joined the Hrist Research Centre of GEC Ltd Wembley UK in 1956 doing research in semiconductors and microwaves. He was appointed Lecturer in Engineerking at Cambridge University in 1965 and Fellow of Trinity College Cambridge in 1966. In addition to papers on semiconductors microwaves radio-echo sounding and numerical electromagnetics his publications include a book on finite element methods (with P. P. Silvester) and a textbook on electromagnetics. He has held visiting professorships at Cornell and McGill Universities. Mr Ferrari is a Member of the IEE and a chartered engineer.

A finite element method formulation is given for solving Schrodinger's wave equation for a single electron in a crystal lattice cell subject to a known periodic potential. The formulation has been implemented for a two-dimensional lattice, with an arbitrary potential profile, modelled by quadratic isoparametric elements. The FEM solver returns a specified number of electronic energy states, E(n), and nodal values of the complex wavefunction psi(n). Input data is generated by a standard FEM mesh generator. The postprocessing, given n, for reproducing a full 2-D E-k Brillouin diagram and given k, the electronic distribution, has been implemented. Tests on a 2-D generalized Kronig-Penney energy band model showed excellent agreement between FEM results and analysis. The solver was further satisfactorily checked against published augmented plane wave calculations for a circular potential well within a square lattice. Specimen results are presented for the same circular well but with graded potential distributions and for a rectangular potential barrier set askew in a square lattice. Two-dimensional energy band solvers have application to superlattice nanostructures, whilst a general, full 3-D FEM quantum solver seems feasible.

关键词： Band structure

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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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Robust excitation controller design for synchronous generators using output feedback

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European Transactions on Electrical Power 1993年第6期3卷 443-451页

作者： Papadopoulos, D.P. Bandekas, D.V. Smith, J.R. Professor Demetrios P. Papadopoulos (1942) received the B.S.E.E. degree from Marquette University Milwaukee-Wisconsin/U.S.A. in 1965. He received from the same University his M.S. degree in 1968 and his Ph.D. degree in 1970 both in Electrical Engineering. During 1970 to 1972 he was Assistant Professor at the Dept. of Electr. Engineering of Gonzaga University Spokane-Washington/U.S.A. From 1972 and up to this time he is with the Public Power Corporation of Greece working on various special projects of power systems. Since 1951 he is Professor and Director of the Electrical Machines Laboratory of the Department of Electrical Engineering at Democritos University of Thrace (D.U.T.) From 1987 until 1988 he served as Vice-Rector at D.U.T. and from 1989 until 1991 as General Secretary of Eastern Macedonia and Thrace Region of Greece. He is Senior Member of IEEE Member of the Technical Chamber of Greece and also of the Societies IIME TBII HKN and ΣX. His research interests are in the electrical machines and power sysrems area. (Electrical Machines Laboratory Department of Electrical Engineering Democritos University of Thrace GR-67100 Xanthi/Greece. T +3054/27955 Fax +30541/20275) Dipl.-Ing. Demetrios V. Bandekas (1966) received the Eiectrical Engineering degree from Democritos University of Thrace (D.U.T.)/Greece in 1990. Currently he is a Research Associate in the Electrical Machines Laboratory of the Department of Electrical Engineering at D.U.T. working towards his Ph.D. degree in the area of modelling simulation andcontrol of electrical machines. He is Member of the Technical Chamber of Greece. (Electrical Machines Laboratory Department of Electrical Engineering Dernocritos University of Thrace. GR-67100 Xanthi/Greece. T +30541/79215 Fax +30511/20275) Professor John R. Smith (1937) is head of the Electrical Machines Group at the Centre for Electrical Power Engineering (CEPE) at Strathyclyde University/U.K. Prior to taking up this post he was Dean of the Faculty of Engineering at Aberdeen University/U

In this work an alternate systematic procedure is proposed for the control of high‐order multiple‐input multiple‐output (MIMO) linear time‐invariant open‐loop system models. The procedure forms the corresponding high‐order single‐input multiple‐output (SIMO) open‐loop model from which it obtains an adequate reduced‐order SIMO open‐loop model (all states of which are measurable and may be made to coincide with its output variables). Then an implementable controller based on the reduced‐order SIMO model, using the spectral pole‐placing algebraic control method with complete state‐feedback, is derived. The controller of the reduced‐order SIMO model is then used for controlling the original high‐order MIMO open‐loop system model. The proposed control approach was applied to a linearized 9th‐order MIMO open‐loop synchronous generator system model and yielded an implementable excitation controller, which was tested successfully in three more operating points of the over‐ and under‐excitation regions of the generator for proving its desired robustness. The four designed 9th‐order MIMO closed‐loop systems displayed remarkably improved dynamic stability characteristics. Copyright © 1993 John Wiley & Sons, Ltd.

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