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SUCEAVA
THE "STEFAN CEL MARE" UNIVERSITYTHE FACULTY OF ELECTRICAL ENGINEERING
2000
Editura MU~ATlNll
Tip!\rilla MUSATINII S.A. Suceava
All righls reserved No parI aflhis baok may be reproduced in any[arm or hyany means, without pennin';on in writing/rom thepublisher.
ISBN 973-8122-11-2
Published by: Faculty of Electrical Engineering Suceava, Romania
Edited by: A. Graur, Gh. SI. Penliuc, A. D. Potorac, C-tin Filole,G. Mahalu. D. Milici
National Organizing Committee
Nicolae ALEXANDRU- Technical University I~i
Constantin FILOTE- "~lefan eel Mare" University of SuceavaAdrian GRAUR- "Stefan eel Mare" Unjvcrsity ofSuceava$tefan 1I0LBA- "Politehnica" Uni\crsity orTil1li~oara
loan JURCA- "Politchnica" University ofTimi~ara
loan Alfred LElIA- Technical University of Cluj- apoeaLeon MANDlel- "$tcfan eel Mare" University of SuecavaRadu MUNTEANU- Technical University ofCluj-NapocaRadu PENTI UC- "Stefan eel Marc" University of Suecava$tefao Gh. PENTIUC- "Stefan eel Mare" University of SuecavaMircea PETRESCU- "PoJitchnica" University of BucharestAli" Dan POTORAC- "Stefan eel Marc" University of SuccavaCornel TURCU- "Stefan eel Mare" University of SuccavaAlexandru VALACHJ- Technical University of la~i
tV
CONTENTS
Section ADIGITAL SYSTEMS IN PROCESS CONTROL
Ultraviolet Sensors with Minimal Sensibility in Visible and IR Spectrum RegionsP. TODOS, V. DOROGAN, V. TROFIM, T. VIERU, M. MANOLE, V. COSEAC
Manufacturing Technologies for Low Cost Solar CellsP. TODOS, V. DOROGAN, V. TROFIM, T. VIERU, M. MANOLE, V. COSEAC 6
Optimal Control of Power flows in Electrical Power Systems Using Theory of Similarity1'. LEZHNUK, E. DIDICHENKO, K. KRAVTSOV 10
About Olle Method to Control the Voltage in Electric NetsB. MOKIN, V. GRABKO, I. LVOV 16
Synthesis of Regulators 10 the Objects with Second Order Advance Delay, Astatism and TimeDelayB. IZVOREANU, A. ANDRIES, A. VASCAN, LENI 20
The Tuning of Regulators to the Objects with Advance Delay and Astatism8. IZVOREANU, A. ANDRIES, LENI, A. VASCAN 24
Distributed Computations in COl1lral and Optimum Control of Technological ProcessesV. A8ABlI, E. GUTULEAC, V. SUDACEVSCHI 30
111e Topology and Mathematical Models for Real-Time Distributed Control of TechnologicalProcessesV. A8A8II, V. SUDACEVSCHI, V. NEGURA 3S
The Method of the Robust Stability of Non-Lincar Non-Stationary Systems Problcm SolutionS.YUKHIMCHUK 40
Improvement of the Characteristics of Analog-to-Digital Converters by Methods of InformationRedundancyA. AZAROV, S. ZAKHARCHENKO, N. 81LICHENKO 47
v
The Nonlinear Distortions Estimation for Dynamic Transistor NegatronsP. MOLCHANOV, H. UNNIK, P. MULYAR 52
Floating-Poinl Multiplier for Digital Signal ProcessingV. GUZUN, I. GUZUN. R. POPET 56
Distrbuted Digital Signal Processing Using DSP-l3ased Boards and the Khors Package on LinuxPlatformsM. MICEA A. TRIFU. M. TRIFU 61
Simple Real-Time Sonar Implemented wah a DSP-Based BoardM. MICEA, L MUNTEAN, D. BROSTEAN, D. CHICIUDEAN 67
New Methods of Representation of the Digital InformationA. PETUKH, V. VOJTKO 73
On Analysis of Dynamics of Voltage Converter-Induction Motor DrivesN. Va. OVCHARENKO, O. B. POPONOVA, E. M. YAROSHENKO 76
Observer-Based Control of a Surface Permanent Magnet Synchronous MachineM. CERNAT, V. COMNAC, F. MOLDOVEANU, R. M. CERNAT 79
Frequency-tn-Voltage ConverterGH. BALVTA, I. VILUOTlS, N. PAPAHATZIS 86
Minimax Estimations Problems in Banach SpacesM. RUSNAK, A. SADOVIAK 90
Computing Criterions of Stability of Linear SystemsV. KUSliNIRCHUK, Y. STETCKO 92
Synthesis of Control Systems with Change of a Measurability of a Phase SpaceF. SOPRONIUK 94
Optimal Control Synthesis for Moving Robot Capture on the Given TrajectoryI. GAIDAICIIUK, 1. GAIDAICHUK 97
Algorithm of a Solution of Some Dynamics Task for Robots with Eleelromechanical Driveso. BABIN, V. LAZORIC, V. FRATAVCHAN 101
Identification of a Heat Exchanger that is Part of a Wine Refrigeration/Pasteurization InstallationHaving in View thc Automatic ControlS. CIUREANU, I. OLAII 103
Contributions Regarding Computer-Assisted Surveillance and Control of the Wine RefrigerationProcess in Order to Stabilize it Face to Tartric PrecipitationsS. CIUREANU, I. OLAH 107
Le modele matematiquc du generateur synchronc de construclion universelle1. AMBROS, L.IAZLOVETCHI, 1. GHERMAN 112
Automatic Systcm for Temperature Monitoring on a Board Achieved to Stress Relieving of thePipes Manually Soldered with Covered ELectrodesD. MILICI, R. LVCA, M. MILICI 116
VI
Some Software Implementation Aspects in Multifunctional Distributed SystemCr. TURCU, C. TURCU, I. OLAH
PID Controller Workstation in Multifunctional Distributed SystemC. TURCU, Cr. TURCU, V. GAITAN, R. FECIIET
Extraction Techniqucs of Delay Information from Experimental Chaotic Time SeriesG. MAHALU, C. SOTAN
Section BELECTRICAL DRIVES CONTROL
120
124
110
A Method for Reducing the Influence of Voltage Sags on AC Drives OperationM. HAJDER, V. KATIC III
Improvcd Stabilized Voltage Regulator Using Current ConveyorsD. E. TILIUTE 139
Multi-User System for Electric Energy Consumption for Poiana Distribution StationA. STOCHITOIU, M. MARCU, I. MARCU 141
Simulating the Transfer Characteristic of the Asynchronous Motor Using Mathematical Modelingwith MatlabN. BlZON, R. MDUCU 147
Energy Saving Problems on the Mining Enterprises by Means of Electric DriveV. NAIIUL, D. RODKIN, O. CIIORNY, G. SIIOBASII 151
System Analogies of ElectromechanicsS. BEZVERKHY, V. NAIIUL, G. SHOBASII 155
High Performance Digital Motor Control Using an Universal Motion ProcessorL. KREINDLER, R. GIUCLEA, A. SARCA, 11. MINCA, L. ANTOGNINJ 161
Designing a Novel Digital Control Strategy Approach for Electrical Power Drive SystemsD. ILEA, D. STOIA 167
A Novel Digital Controller for Starting Inductioll Motor DrivesM. rOANN IDES 173
Structure and Methodology of a Knowledge Based System for Diagnosis and Maintenance ofInduction Motor DrivesM.IOANNIDES 180
Hannonic Analisys of Static Power Converters under Unbalanced Input ConditionsE.COCA
Fuzzy Algorithm to Control Rectified BridgesA. STOCJIITOIU, M. MARCU, T. TABACARU, M. D. ORBAN
Protective Relay for Controlling Asynchronous MotorsA. STOClIITOJU, M. MARCU, L. SAMOILA, M. D. ORBAN
VII
188
191
195
11lfee-Phase Current-Regulated Modulation Voltage Source InverterI. COJOCARlU, C. POPA
Moteors electriques submersibles non - protegees - une possible direction de rechercheD.CERNOMAZU. L.MANDlCI, C.E.BOBRIC, G.RATA
198
204
Considerations concernant la construction des micromoteurs e1ectrostatiques a permittivitevariable (MEPV) et l'jnterstice axialL.MANDlCI, D.CERNOMAZU 208
Considerations concernant la construction des micromoteurs electrostatiques a permittivitevariable (MEPV) et I'interstice radialL.MANDlCI, D.CERNOMAZU, C.E.BOBRIC 214
Section CDATA TRANSMISSION AND COMMUNICATION
Smart Cards, Architectures and Programming ModelsC. MORARESCU, F.IACOB, C. POPESCU, A. STEFANESCU, C. AI. BOICEA
Doc-++ Open Source - Open Science - Open SystemsD. ACOSTACHIOAIE
219
223(
Performance Analysis of a WDMA Protocol with Finite Number of Tunable Receivers andMultichanneL Control ArchitectureI. E. POUNTOURAKIS 227
Error-Control Codes Behaviour on Fading Communications ChannelsL. SCRlPCARlU 232
Increased Performances of Digital Demodulators on Fading Channel Using Some Error-CorrectingCodesL.SCRlPCARU, P. COTAE 237
A Generalization of Q2 PSK SignalsN. D. ALEXANDRU, L. SCRIPCARIU, V. CEHAN, C. GIURGIU 241
An Evaluation of Spectral Properties for Some Minimum-Bandwidth Line CodesN. D. ALEXANDRU, V.CEHAN, L. PANCESCU 248
Means and Protocols of the Secured Data Transfer in Computer NetworksV. YEo MUKHIN, V. P. SHYROTCHIN, A. YU.ISHUTIN 252
Efective Bandwidth Characterization ofSynchronolis CDMA SystemsP. COTAE, L. SCRIPCARlU, F. DIACONU 256
On User Capacity of Power Controlled Synchronous CDMA SystemsP.COTAE, L. SCRIPCARlU, F. DIACONU 260
Mathematical Modelling of Signals Given From a Dynamic Pesticides Biomedical SystemD. C. VOUKALlS, P. OlKONOMOU 264
System for Building TV SupelVising Using an Intranet and Processing Images TechniquesA. GRAUR, SI-Gh. PENTlUC, A. D. POTORAC, R. PRODAN, Gh. SANDU 266
VIII
Section DMODELING, COMPUTER AIDED DESlGN
Concepts d'elaboration des circuits combinatoires arbitraires duauxl. COJOCARU 269
Synthese des structures digitales elcmentaires reconfigurables duales en deux niveaux logiquesI. COJOCARU 275
Numerical Solving of Convex Programming ProblemsV.MORARU 281
La verification fonctionelle des protocoles par la methode des P-invariants coloresE.GUTULEAC. V.MORARU, V.GISCA 286
Analyse de performances d'un sysleme multiprocesseur par reseaux de Pelri I-fybridesStochastiquesE.GUTULEAC 292
The Station ofCommand-lnfom13tion LAN "MISNEr'O.NICOLAICIUC 298
The Working Algorithms ofCorumalld-lllformatioll LAN "MlSNET" 30 IO.NICOLAICIUC, E.GUTULEAC
Parallel Solving Linear Systems on a Shared Memory MlMD ArhitecturcF.IACOB, CPOPESCU, CMORARESCU, CSTEFANESCU 307
VLlW Compilations Techniques in An Architectural Environment of Superscalar ProcessingC.POPESCU. F.IACOB. C.MORARESCU, C STEFANESCU, .A.BOICEA 313
The Multicriteria Problem of Optimization in Projection of Building ConstructionsV,KUSHNJRCHUK, Y.STETCKO 323
Modeling of the Multi-Sector Rising EconomyM.BOICHUK, N.SHMURIGJNA 326
Modeling Technology in Global EcoinfonnaticsCI. NITU. V.F.KRAPIVJN
A Study About the Fuuy Sets in the Fuzzy Logic ControllersL.T1GAERU
330
334
The Combined Method of Optimum Control and Divisible Maximal Approximate SynthcsisV.BOGHANASTJUK, N,KOBYLlATZKY, V.RlCU, V.ANESTIADY, V.SCORPAN 340
The Determinations ofTemperatu(c Rise Speed for Motor with Chocked RotorM. RATA, G. RATA. D. MILlCI, M. MILICI, CE. BOBRlC 346
Monitoring and Computer Aided Breathing Training Based on BiofeedbackV. NEGURA. I. MANDRESCU, V. ABABEI, I. MOLDOVAN. V. VOVC 350
The Pipeline Structures for Special Purpose Processors
IX
S. ZAPOROJAN. R. DONTU,V. GISCA, V. MORARU
Thermal Nodal Model for Single-Phase Dry Type TransformersC. POPA, I. COJOCARlU, N.DARBA, R. PENTlUC
J\ulomata Array DesignF. HOZA, A. VALAGII, C. MONOR
Sectioll EARTIFICIAL INTELLIGENCE, PATTERN RECOGNITION
355
36\
367
Sign<ltures Recognition Using Neural NetworksL. DAFINCA, S. FULGA, R. I'RUNEA 371
Printed Characters Recognition System Based on Neural NetworksL. DAFINCA, R. PRUNEA, S. FULGA 377
Thennodinamic Patterns and LVQ Neural Networks for Fault Diagnostics of a CFM56-3 JetEngineC. ANAGNOSTOPOULOS, E. KAYAFAS, V.LOUMOS 381
The Processing of the Evoked Electrical Activity of the Central Neurons System Using theAdapti \e Filtering AlgorithmsV.PUSCASLJ 387
Analysis of AR Block Data Algorithm for Spectral Estimation of Eeg Short Segment SignalV.PLJSCASU 391
Synthesis of Diagnostic Equations for Systems of Combined DiagnosingA.ROIK, V.MESYURA, 1'. STAVNJCHAYA 395
A Real· Time Application for Isolated - Spoken Words RecognitionM.DOORE. V.I'ALANCILJC, A.LAVRIC, R.BACRALJ 399
Aprlori Estin.mtions of Space Features Informatibility for Patterns RecognitionV.FRATAVCHAN, M.RUSNAK 404
A Software Environment for Collaborative Distribution of KnowledgeI. HAMBURG, STGH.PENTlUC 407
Neural Network System for Primary Local Recognition of Images with SpikesA. DOLlA, V. LUKIN, A.ZELENSKY 413
A Multi-Agent Layered Architecture in Real Time Control Systems for Transfer LinesL.NITU 419
Distributed System for Knowledge Representation and Decision MakingC. NITLJ 423
A Simple Microcontroller Emulation for CVSD ModulationA. D. I'OTORAC 427
Neuro-Fuzzy Method for Control System DesignC. NlTU 433
x
New Data Types and the Relational ModelM. PETRESCU 437
New Algorithms for Update Handling in Enhanced Client-Server DBMSa.M. BREKHOV, S.V. MAKAROV 442
Comparison of Update Managing Algorithms on the Basis of Changes aJld Rcciepts Broadcast inthe Enhanced Architecture Client-Servera.M. BREKHOV, S.V. MAKAROV 448
Periodic Orbit in Kohonen Neural Networks Used as Chaotic Neural Networksa. CALITOIU, A. GRAUR. Cr. TURCU, M. DASCALU 454
XI