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