of the 7 th INTERNATIONAL CONFERENCE ON OPTIMIZATION OF ELECTRICAL AND ELECTRONIC EQUIPMENTS AUTOMATION, ELECTRONICS AND COMPUTERS

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1 OPTIM 2000 PROCEEDINGS of the 7 th INTERNATIONAL CONFERENCE ON OPTIMIZATION OF ELECTRICAL AND ELECTRONIC EQUIPMENTS Volume III AUTOMATION, ELECTRONICS AND COMPUTERS Control of Linear and Non-linear Systems. Adaptive and Robust Control. Observers Intelligent Systems Modelling, Simulation Industrial Informatics. Safety and Reliability Electronic Circuits Microelectronics Signal Processing Measurements and Data Acquisition Information and Communications Technologies Medical Electronics Edited by The Tramilvania University of Bra ov Faculty of Electrical Engineering Bra$OV, May 11-12, 2000 UB/TIB Hannover

2 CONTENTS Control of Linear and Non-linear Systems. Adaptive and Robust Control. Observers. 3 A1 CURRENT CONVEYOR BASED PROPORTIONAL-INTEGRAL-DERIVATIVE (PID) CONTROLLER AND CALCULATING OPTIMUM PARAMETER TOLERANCES Cevat ERDAL, Ali TOKER, Cevdet ACAR, Istanbul Technical University, Turkey A2 NONLINEAR OBSERVER AND CONTROL DESIGN FOR A CLASS OF MECHATRONIC SYSTEMS Martin RAU, Dierk SCHRODER, Technical University of Munich, Germany A3 MUTUAL INDUCTANCE SENSITIVITY OF AN INDUCTION MACHINE FLUX OBSERVER IN DISCRETE TIME DOMAIN Emmanuel DELMOTTE, Central School of Lille, France A4 CONTROL SYSTEM FOR THE MAGNETIC BEARINGS OF A BALANCING MACHINE Toma-Leonida DRAGOMIR, loan SILEA, Politehnica University of Timisoara, Romania A5 ADAPTIVE GENERALIZED PREDICTIVE CONTROL. THE BASIC ALGORITHM AND A SIMULATION STUDY loan NASCU, Tiberiu COLOSI, Silviu FOLEA, Technical Univeristy of Cluj-Napoca, Romania A6 ADAPTIVE OBSERVER FOR SENSORLESS CONTROL OF PMSM DRIVES Gheorghe Daniel ANDREESCU, Politehnica University of Timisoara, Romania A7 SLIDING MODE BASED OBSERVERS FOR SENSORLESS CONTROL OF PMSM DRIVES - Two COMPARATIVE CASE STUDIES Gheorghe Daniel ANDREESCU, Adrian POPA, Adrian SPILCA, Politehnica University of Timisoara, Romania A8 ROBUST CONTROL OF A SYNCHRONOUS MOTOR WITH PERMANENT MAGNETS Ladislav BALARA, Ladislav ZBORAY, Viliam FEDAK, Technical University of Kosice, Slovak Republic A9 SENSORLESS CONTROL OF INTERIOR PERMANENT MAGNET SYNCHRONOUS MACHINE USING STOCHASTIC FILTERING TECHNIQUES Vasile COMNAC, Florin MOLDOVEANU, Mihai CERNAT, loan DRAGHICI, Radu-Marian CERNAT, Transilvania University of Brasov, Romania 619

3 IV Optimization of Electrical and Electronic Equipments - Brasov A10 SENSORLESS INDUCTION MOTOR CONTROL STRATEGY OPTIMISED FOR FPGA HARDWARE IMPLEMENTATION Andrei DINU, Marcian CIRSTEA, Malcolm McCORMICK, De Montfort University, Leicester, United Kingdom; Antonio OMETTO, Nicola ROTONDALE, University of Aquila, Italy 625 Intelligent Systems 3. B1 FUZZY CONTROL OF THE CURRENT PHASE IN INDUCTIVE CIRCUITS Constantin SUCIU, Liliana DAFINCA, Transilvania University of Brasov, Romania; Mohan KANSARA, Trent University of Nottingham, United Kingdom; Adrian SZABO, TRW Automotive, Solihull, United Kingdom B2 DIAGNOSING ACTIVE SYSTEMS USING NEURAL NETWORKS Dorin DRAGUTOIU, Alexandra VASILIEVICI, Politehnica University of Timisoara, Romania637 3 B3 A NEURAL CONTROLLER FOR PERMANENT MAGNET DC MOTOR USING A FUZZY CONTROLLED TRAINING ALGORITHM Honoriu VALEAN, Technical University of Cluj Napoca, Romania B4 NEURAL SUPERVISORY FOR AN ELECTROCORUNDUM FURNACE CONTROL Honoriu VALEAN, Adina ASTILEAN, Tiberiu LETIA, Technical University of Cluj Napoca, Romania B5 IDENTIFICATION METHOD OF INDUCTION MOTOR DRIVES USING ARTIFICIAL NEURAL NETWORKS Liliana DAFINCA, Constantin SUCIU, loan MARGINEANU, Transilvania University of Brasov, Romania B6 AN IMPROVED FUZZY CONTROL TECHNIQUE FOR THE PATH TRACKING PROBLEM ON MOBILE ROBOTS Marian POBORONIUC, Gheorghe Asachi Technical University of Iasi, Romania; Dumitru POPESCU, Politehnica University of Bucharest, Romania; Gheorghe LlVTNT, Gheorghe Asachi Technical University of Iasi, Romania; Ahmed EL HAJJAJI, Center of Robotics, Electrotechnics and Automation, Amiens, France B7 EVOLUTION STRATEGIES IMPROVING NEURO-FUZZY DESIGN OF DUTY-CYCLE COMPENSATION CONTROLLER USED IN DC SPEED CONTROL SYSTEMS Ovidiu GRIGORE, Adriana FLORESCU, Constantin RADOI, Octavian GRIGORE, Politehnica University of Bucharest, Romania B8 NEURAL CURRENT CONTROLLER FOR INDUCTION MOTOR APPLICATIONS Andrei DINU, Marcian CiRSTEA, Malcolm McCORMICK, De Montfort University, Leicester, United Kingdom; Lawrence HAYDOCK, Nazar AL-KHAYAT, Newage International Ltd, Stanford Lincolnshire, United Kingdom B9 THE CONTROL OF NONLINEAR SYSTEM USING COMPETITIVE NEURAL NETWORKS Octavian GRIGORE, Ovidiu GRIGORE, Adriana FLORESCU, Politehnica University of Bucharest, Romania 671

4 CONTENTS of Volume III Modelling, Simulation 3. C1 PSPICE SIMULATION MODELS FOR INDUCTION MOTOR DRIVES Iulian TOP A, Razvan PANAITESCU, Transilvania University of Brasov, Romania C2 STATE-FEEDBACKAPPLIEDTOADOUBLEFEEDINDUCTION GENERATOR OF A DIESEL-ELECTRIC LOCOMOTIVE. NUMERICAL SIMULATION Rodica FESTILA, Eva SZAKACS, Technical University of Cluj-Napoca, Romania C3 INTRODUCTORY STEP FORA SIMPLIFIED NUMERICAL SIMULATION OF AN ISOTOPICSEPARATION COLUMN Tiberiu COLOSI, Paula RAICA, Mihai ABRUDEAN, loan NASCU, Eva SZAKACS, Technical University of Cluj-Napoca, Romania C4 MODELLING AND NUMERICAL SIMULATION OF THE STABILIZATION PROCESS OF THE CUTTING FORCE AT THE LONGITUDINAL TURNING loan CRISTIAN, Catrina GEORGESCU, Transilvania University of Brasov, Romania C5 A MATRIX MODEL OF DISCRETE EVENT SYSTEMS FOR USE IN SIMULATION Florin MOLDOVEANU, Vasile COMNAC, Mihai CERNAT, Dan FLOROIAN, Transilvania University of Brasov, Romania C6 A MODEL OF CONTROL STRUCTURE WITH ERRONEOUS FIELD ORIENTATION AT INDUCTION MOTORS Constantin Mircea APOSTOAIA, Sorin Aurel MORARU, Francisc SISAK, Transilvania University of Brasov, Romania 701 Industrial Informatics. Safety and Reliability 3 D1 MMI EMULATOR FOR PLC APPLICATIONS Dorin POPOVICI, Politehnica University of Timisoara, Romania D2 A METHODOF MULTIPLE EXPLOITATION OFTHE PROGRAMMABLE LOGIC CONTROLLER INPUTS AND OUTPUTS VIA SIGNAL MULTIPLEXING AND MULTITASK OPERATION Constandinos C. KONTOGIANNIS, Athanasios N. SAFACAS, University of Patras, Greece D3 A STUDY OF EQUIPMENT MAINTENANCE ADMINISTRATION USING INTEGRATED SOFTWARE SYSTEM Sorin Aurel MORARU, Constantin Mircea APOSTOAIA, Transilvania University of Brasov, Romania; Calin Florin BABAN, loan Eugen RADU, University of Oradea, Romania D4 A REGRESSION APPROACH IN THE RELIABILITY OF INTERMITTENTLY USED MACHINES Florin POPENTIU VLADICESCU, City University of London, United Kingdom; Grigore ALBEANU, University of Bucharest, Romania; Elena UNGUREANU GRIGORE, Spiru Haret University, Bucharest, Romania 719

5 VI Optimization of Electrical and Electronic Equipments - Brasov D5 RELIABILITY ASSURANCE OF THE INDUSTRIAL ROBOTS Calin Florin BABAN, loan Eugen RADU, University of Oradea, Romania; Sorin Aurel MORARU, Francisc SISAK, Transilvania University of Brasov, Romania 723 Electronic Circuits 3 El THERMALLY STABILIZED CIRCUIT TO AN AUTOPOLARISATION VOLTAGE REFERENCE Cosmin POPA, Andrei PASCU, Radu ZLATANOVICI, Politehnica University of Bucharest, Romania E2 TEMPERATURE COEFFICIENT IMPROVEMENT TECHNIQUE FOR A TEMPERATURE-COMPENSATED VOLTAGE REFERENCE Cosmin POPA, Andrei PASCU, Radu ZLATANOVICI, Politehnica University of Bucharest, Romania E3 CONVERTER OF SOLAR ENERGY INTO ELECTRIC SIGNAL Pavel DIMTTRAKI, Anatolie CARCEA, Silvia GANGAN, Technical University of Chisinau, Moldova E4 SWEEP GENERATOR WITH DIGITAL FREQUENCY MARKER FOR SCALAR NETWORK ANALYZER Iuliu SZEKELY, Gyula SZEKELY, Daniel CIOCEA, Transilvania University of Brasov, Romania E5 WIDE RANGE DIGITAL CONTROLLED CURRENT GENERATOR Adrian Virgil CRACIUN, Transilvania University of Brasov, Romania, Gheorghe PRICOP, Airforce Academy of Brasov, Romania E6 ELECTRONIC SIMULATOR FOR A FREQUENCIALLY GENERATED REFERENCE ANGULAR ERROR Alexie ILIE, Laura RAB, Aurel FRATU, Cristian ILIE, Transilvania University of Brasov, Romania. 747 Microelectronics 3.F1 SYSTEMS-ON-A-CHIP DESIGN AND APPLICATION PERSPECTIVES IN FUTURE MOBILE RADIO COMMUNICATIONS Manfred GLESNER, Juergen BECKER, Lukusa KABULEPA, Octavian MITREA, Burkart VOSS, Darmstadt University of Technology, Germany F2 A CONTINUOUS OPERATION SYSTOLIC SERIAL MULTIPILIER Kiamal Z. PEKMESTZI, Paraschevas G. KALIVAS, Nikos K. MOSHOPOULOS, S. Ioannis SIFNAIOS, National Technical University of Athens, Greece F3 ON THE PROPERTIES OF A NEW POLYIMIDE FILM SUITABLE FOR INTERLAYER DIELECTRIC APPLICATION IN VERY LARGE-SCALE INTEGRATION (VLSI) Ayten KUNTMAN, Hakan KUNTMAN, Technical University of Istanbul, Turkey F4 IMPLEMENTATIONOFANOVELMOSFETMODELINTOSPICEPROGRAMTOOBTAINEXTENDED ACCURACY FOR SIMULATION OF ANALOGUE CIRCUITS Hakan KUNTMAN, Abdurrahman DOLAR, Technical University of Istanbul, Turkey 765

6 CONTENTS of Volume III VII 3. F5 OPTIMAL REDESIGN OF FLY-BACK CONVERTER POWER SUPPLY Claudiu PATRU, Claudius DAN, Mircea BODEA, Politehnica University of Bucharest, Romania F6 LOW-NOISE WIDE-BAND AMPLIFIER WITH INDUCTIVE SOURCE Elena DOICARU, University of Craiova, Romania; Claudius DAN, Politehnica University of Bucharest, Romania F7 ALL-PASS FILTERS EMPLOYING A NEWLY INTRODUCED ACTIVE ELEMENT: CDBA, CURRENT DIFFERENCING BUFFERED AMPLIFIER Sadri OZCAN, Hakan KUNTMAN, Ali TOKER, Technical University of Istanbul, Turkey; Oguzhan CICEKOGLU, Bogazici University of Istanbul, Turkey F8 CURRENT MODE FILTERS FOR MULTIPURPOSE APPLICATIONS EMPLOYING A SINGLE CDBA AND ONLY GROUNDED CAPACITORS Sadri OZCAN, Hakan KUNTMAN, Istanbul Technical University, Turkey; Oguzhan CICEKOGLU, Bogazici University, Istanbul, Turkey 783 Signal Processing 3.G1 DIGITAL IMAGE PROCESSING AND NEURAL NETWORKS FOR VEHICLE LICENSE PLATE IDENTIFICATION Chris ANAGNOSTOPOULOS, Eleftherios KAYAFAS, Vassili LOUMOS, National Technical University of Athens, Greece G2 RESTORATION OF OPTICAL VARIABLE DENSITY SOUND TRACKS ON MOTION PICTURE FILMS BY DIGITAL IMAGE PROCESSING Detlef RICHTER, Ines-Henrike KURRECK, Dieter POETSCH, Wiesbaden University of Applied Sciences, Germany G3 FACE RECOGNITION USING 3D DISTANCE MAPS AND PRINCIPAL COMPONENT ANALYSIS Horia GRECU, Vasile BUZULOIU, Razyan BEURAN, Elisabeta PODARU, Politehnica University of Bucharest, Romania G4 COLOR EDGE DETECTION BY PERCEPTUAL ASSESSMENT OF LOCAL NON-UNIFORMITY Constantin VERTAN, Mihai CIUC, Vasile BUZULOIU, Politehnica University of Bucharest, Romania; Rangaraj M. RANGAYYAN, University of Calgary, Alberta, Canada G5 AN ALGEBRAICAL MODEL FOR GRAY LEVEL IMAGES Vasile PATRASCU, loan VOICU, Politehnica University of Bucharest, Romania G6 A SCALABLE MULTI-DSP SYSTEM FOR ROOM IMPULSE RESPONSE SIMULATION Reinhold WEISS, Robert HRANITZKY, Technical University of Graz, Austria G7 A NEW METHOD FOR PERIOD DETERMINATION OF VERY DISTORTED AND NOISY SIGNALS Cristian FOSALAU, Mihai CRETU, Gheorghe Asachi Technical University of Iasi, Romania. 817

7 VHI Optimization of Electrical and Electronic Equipments - Bra ov 2000 Measurements and Data Acquisition 3.HI INVESTIGATION OF FLOW BEHAVIOUR IN THE NEAR VICINITY OF A GAS BUBBLE BY LASER- DOPPLER-ANEMOMETRY Angela V. JIANU, National Institute for Lasers, Plasma and Radiation Physics, Bucharest, Romania; Volker HEINZEL, Wolfgang CHERDRON, Institute for Reactor Safety of Karlsruhe, Germany821 3 H2 CARBON MONOXIDE - DANGERS, DETECTION. CO LEVEL CONTROL SYSTEM Bogdan BARABOI, Mihai CRETU, Cristian FOSALAU, Gh. Asachi Technical University of Iasi, Romania; Dana E. BARABOI, Sf. Spiridon Universitary Hospital of Iasi, Romania H3 NEW TYPES OF ULTRAVIOLET SENSORS Petru I. TODOS, Valerian V. DOROGAN, Viorel Gh. TROFIM, Pavel N. METLINSCHI, Mihail A. MANOLE, Valeriu A. COSEAC, Tatiana S. VIERU, Technical University of Moldova, Kishinev, Moldova H4 DEVICE FOR ANGULAR ACCELERATION MEASUREMENT Petru BRAD, Politehnica University of Timisoara, Romania; Atilla SONAL, University of Kaiserslautera, Germany H5 MEASUREMENT OF OXYGEN RESIDUES IN GASEOUS NITROGEN USING A METHOD OF INFLUENT FIELDS Gheorghe MORARIU, Iuliu SZEKELY, Transilvania University of Brasov, Romania H6 MEASURING SYSTEMS FOR MAGNETIC PROPIERTIES AND POWER LOSSES IN SILICON-IRON SHEETS loan OLTEAN, Elena HELEREA, Adrian MUNTEANU, George NICOLAE, Lia ACIU, Transilvania University of Brasov, Romania H7 VIRTUAL INSTRUMENTATION FOR MEASUREMENTS UNDER NON-SINUSOIDAL CONDITIONS Gheorghe PANA, Florin SANDU, Carmen GERIGAN, George NICOLAE, Transilvania University of Brasov, Romania H8 A HIGH ACCURACY AND LOW COST RADAR ALTIMETER Kiamal Z. PEKMESTZI, George E. STRATAKOS, Paul P. BOUGAS, Konstantinos L. GOTSIS, National Technical University of Athens, Greece H9 ABOUT INTERFACING MOTOR CONTROL TO COMPUTER BASED SYSTEMS Carmen GERIGAN, Petre OGRUTAN, Gheorghe PANA, Transilvania University of Brasov, Romania H10 TEST BENCH FOR GYROSCOPES Gheorghe PRICOP, Airforce Academy of Brasov, Romania Adrian Virgil CRACIUN, Gheorghe PANA, Transilvania University of Brasov, Romania H11 VIRTUAL VOLTAGE SUPPLY FOR COMPUTER-BASED CALIBRATION OF VOLTMETERS Radu MUNTEANU, loan G. TARNOVAN, Technical University of Cluj-Napoca, Romania. 863

8 CONTENTS of Volume III IX Information and Communications Technologies 3.11 ON HYPERMEDIA ASSISTED LEARNING Marina Dana TOP A, Adrian BURIAN, Technical University of Cluj-Napoca, Romania WEB BASED E-EDUCATIONAL ENVIRONMENTS USING JAVA TECHNOLOGY loan SALOMIE, Felix HAMZA-LUP, Razvan Stefan BOT, Mihaela DINSOREANU, Technical University of Cluj-Napoca, Romania THE PROBABILITY DENSITY FUNCTION OF THE SAMPLE MEAN IN THE BACKSCATTERING TECHNIQUE loan I. DUMA, Politehnica University of Bucharest, Romania OPTIMAL BINARY EXTENSIBLE CODES Sabin TABIRCA, Tatiana TABIRCA, Cristina VLADAREAN, Transilvania University of Brasov, Romania AN EFFICIENT ALGORITHM FOR THE HAMMING CODING Tatiana TABIRCA, Sabin TABIRCA, Cristina VLADAREAN, Transilvania University of Brasov, Romama 887 Medical Electronics 3. J1 VIRTUAL MEDICAL INSTRUMENT Radu MUNTEANU, Marius N. ROMAN, Mihai MUNTEANU, Ciprian OLTEAN, Technical University of Cluj-Napoca, Romania J2 ACQUISITION AND TELE-TRANSMISSION SYSTEM FOR BIOLOGICAL SIGNALS Paul N. BORZA, Wilibald SZABO, Florin SANDU, loan S. OPRISAN, Transilvania University of Brasov, Romania J3 MULTIGRID METHODS Marius N. ROMAN, Radu A. MUNTEANU, Technical University of Cluj-Napoca, Romama J4 VIRTUAL ECG ACQUISITION AND CLASSIFICATION SYSTEM Florin SANDU, Wilibald SZABO, Ovidiu HOHOIU, Transilvania University of Brasov, Romania J5 STABILITY CONDITIONS FOR AN ECG AMPLIFIER WITH COMBINED DRIVEN RIGHT LEG AND GUARDING CIRCUITS Mihai ROMANCA, Florin SANDU, Gheorghe PANA, George NICOLAE, Transilvania University of Brasov, Romania J6 IMPLEMENTING ECG DIGITAL FILTERS AS DLLS AND CALLING THEM FROM LAB VIEW Mihai ROMANCA, Gyula SZEKELY, Rares Gelu MANIU, Transilvania University of Brasov, Romania 913