Fuzzy Logic Based Photovoltaic Peak Power Tracking Controller

1
Fuzzy Logic Based PhotovoltaicPeak Power
Tracking Controller

• Motivation
• Solar photovoltaic power is a prime alternative
  energy source candidate in several countries
• Solar power density with direct overhead
  incidence is 1 Kw/m2
• High initial solar installation costs
• Low cell conversion efficiency (from 12 on
  ordinary units up to a maximum of 29 on very
  special ones)
• Prices for solar cells and power electronics are
  sharply decreasing

2

• The solar array is generally connected to an
  energy storage system, which can be constituted
  by a system of batteries, fuel cells, flywheels,
  or even the distribution mains
• The solar panel is subjected to varying solar
  intensity and changes in environmental
  temperature which, in turn, change the maximum
  power operating point
• In order to speed up the amortization of
  installation costs, it is essential to extract
  the maximum power available on a continuous basis

3
Solar Vehicle Motivated a Lot the Development of
this Fuzzy-PPT !
4
Photovoltaic System Block Diagram
5

• Current x voltage for sunlight intensity variation

Current x voltage for temperature variation
6
Cell Equations

• where
• J is the current density (mA/cm2), v is the
  single voltage cell (V), vp is the total voltage
  (V) in the array, ip is the array current (A), ?
  is the solar intensity (mW/cm2) and T is the
  temperature (oC). The parameters k1
  (non-dimensional), k2 (mA/cm2) ? (voltage
  coefficient V-1), ? (temperature coefficient
  oC-1) and ? (non-dimensional) are adjusted from
  the manufacturer curves with a multi-linear
  regression algorithm, where the parameters are
  calculated to minimize the quadratic error Ncel
  is the number of cells in a series string
  connection that forms the array and Rs is the
  contact resistance between cells.

7
Modeling the solar array
8
Solar Array Driven by a Boost Converter
9

• Modeling the boost converter

10
Photovoltaic system static characteristicsOutput
power, Efficiency Pout/Pin, Array impedance
11
Power due to load variation, for T25oC and
100 mw/cm2
12
Strategy for Optimizing Against Solar Intensity
and Temperature Variation
13
Fuzzy Logic Based Solar Array Controller
14
Tracking Rules

• IF DDCk is P AND DPk is PB THEN DDCk1 is PB
• IF DDCk is P AND DPk is PS THEN DDCk1 is PM
• IF DDCk is N AND DPk is PB THEN DDCk1 is NB
• IF DDCk is N AND DPk is PS THEN DDCk1 is NM
• IF DDCk is P AND DPk is NB THEN DDCk1 is NB
• IF DDCk is P AND DPk is NS THEN DDCk1 is NM
• IF DDCk is N AND DPk is NB THEN DDCk1 is PB
• IF DDCk is N AND DPk is NS THEN DDCk1 is PM

15
Other rules are also necessary, due to the fact
that the characteristic curves might change
with temperature and sunlight level, leading
to an overall shift of the optimum point. In
order to keep track of this situation, the system
must have the following rules

• IF DDCk is Z AND DPk is PB THEN DDCk1 is PM
• IF DDCk is Z AND DPk is PS THEN DDCk1 is PS
• IF DDCk is Z AND DPk is NB THEN DDCk1 is NM
• IF DDCk is Z AND DPk is NS THEN DDCk1 is NS

16
Quantization Effect on the Power Search
17
The following rules have been identified for
avoiding the stabilizing effect in a region other
than that of true peak power
IF DDCk is P AND DPk is ZZ THEN DDCk1 is PS IF
DDCk is N AND DPk is ZZ THEN DDCk1 is NS
Finally, it is necessary to provide the system
with a rule that stabilizes the point of
operation at a peak power point
IF DDCk is Z AND DPk is ZZ THEN DDCk1 is ZZ
18
Membership Functions forFuzzy Search Controller
19
Rules with Different Degrees of Support
20

• Solar intensity variation (l) and the
  corresponding dc-link current change with the
  fuzzy duty-cycle search

21
Illumination application
22
Test for various sunlight intensities
Collected power during one day
23
Fuzzy Based Photovoltaic System Conclusion

• A complete fuzzy logic solar array peak power
  tracking controller has been simulated, designed
  and implemented in the laboratory
• RISC microcontroller with a fuzzy algorithm that
  searches for the optimum duty-cycle that
  transfers the peak power from the solar array to
  a battery charger
• The advantages of the fuzzy controller are that
  the control algorithms give fast convergence and
  robust performance against parameter variation,
  and can accept noisy and inaccurate signals
• The system was found to reliably stabilize the
  maximum power transfer in all operating
  conditions and it is ready to be fitted in a
  larger installation.

24
A FEW MORE POWER ELECTRONICS APPLICATIONS.
25
Fuzzy Logic Based DC-Drive Control System

• Main Features
• Delta-alpha (Da) compensation for converter
  linearisation
• Makes converter characteristics independent of
  conduction region (discontinuous / continuous)
• Enables optimum current control design
• Fuzzy Current controller
• For better response than that obtainable with PI
  control 
• Fuzzy Speed controller
• Less sensitive to load torque disturbances and
  inertia variations

26
Fuzzy Logic Based DC-Drive Control System
27
Phase Controlled DiscontinuousOperation
Compensation
28
Fuzzy Logic Based Slip Gain Tuning

• Main Features
• Continuously identifies the rotor time constant,
  to track variations due to temperature or
  saturation effects
• Combines the best characteristics of the Reactive
  Power model and D-axis Voltage model
• Capable of performing well at any operating point
  in the torque-speed plane
• Fast convergence
• True value for tr

29
General block diagram for IVC system with slip
gain tuning
30
Fuzzy Logic based slip gain tuning
31
List of Related Publications

• SHORT COURSE AVAILABLE ON THE INTERNET
• Webcast lecture for Online Symposium for
  Electronics Engineers
• OSEE at http//www.osee.net Introduction to
  Fuzzy Control
• Available on-line at http//www.osee.net/pro_dsp_c
  ontrol.html
• BOOK
• 1 Fuzzy Modeling and Control Published in
  Portuguese Controle e Modelagem Fuzzy
• Authors Ian S. Shaw and Marcelo G. Simoes
• Publisher Edgard Bluchert, 1999
•  JOURNAL AND TRANSACTIONS PUBLICATIONS
• 1 M. Godoy Simoes, C. M. Furukawa, A. T. Mafra,
  J. C. Adamowski A novel competitive learning
  neural network based acoustic transmission system
  for oil-well monitoring IEEE Transactions on
  Industry Applications, March/April 2000, vol.
  36, pp. 484-491
• 2 M. Milanova, P.E.M. Almeida, J. Okamoto Jr.,
  M. Godoy Simoes Applications of cellular neural
  networks for shape from shading problem Lecture
  Notes in Artificial Intelligence,
  Springer-Verlag, September, 1999, pp. 52-63.

32

• 3 M. Godoy Simoes, N. N. Franceschetti, Fuzzy
  optimisation based control of a solar array
  system IEE Proceedings - Electric Power
  Applications, September 1999, Vol. 146, Issue 5,
  pp. 552-558
• 4 M. Godoy Simões and M. Friedhofer, An
  implementation methodology of a fuzzy based
  decision support algorithm, International
  Journal of Knowledge-Based Intelligent
  Engineering Systems, October 1997, vol.1 no. 4,
  pp. 267-275.
• 5 M. Godoy Simões, Intelligent control based
  vertical-axis wind turbine system Revista
  Brasileira de Ciências Mecânicas, vol.XIX no. 4,
  pp. 518-530, December/1997
• 6 M. Godoy Simões, Bimal K. Bose and Ronald J.
  Spiegel, Design and performance evaluation of a
  fuzzy-logic-based variable-speed wind generation
  system IEEE Transactions on Industry
  Applications, July/August 1997, vol. 33, pp.
  956-965.
• 7 G. C. D. Souza, B. K. Bose and M. Godoy
  Simões, A simulation-implementation methodology
  of a fuzzy logic based control system Revista da
  Sociedade Brasileira de Eletrônica de Potência,
  vol.2 no. 1, June 1997.
• 8 M. Godoy Simões, Bimal K. Bose and Ronald J.
  Spiegel, Fuzzy logic based intelligente control
  of a variable speed cage machine wind generation
  system, IEEE Transactions on Power Electronics,
  vol. 12, pp. 87-95, Jan. 1997
• 9 M. Godoy Simões and Bimal K. Bose, Fuzzy
  neural network based estimation of power
  electronics waveforms Revista da Sociedade
  Brasileira de Eletrônica de Potência, vol.1 no.
  1, June 1996.
• 10 M. Godoy Simões and Bimal K. Bose, Fuzzy
  neural network based estimation of power
  electronics waveforms Revista da Soc. Brasi. de
  Eletr. e Potência, vol.1 no. 1, June 1996.

33

• 11 M.H. Kim, M. Godoy Simões and B. K.
  Bose,Neural network based estimation of power
  electronic waveforms, IEEE Transactions on Power
  Electronics, March/1996, vol. 11 No.2 , pp.
  383-389
• 12 M.G. Simões and B.K.Bose, Neural network
  based estimation of feedback signals for a vector
  controlled induction motor drive, IEEE
  Transactions on Industry Applications, May/June
  1995, vol. 31, pp. 620-629.
•  
• INTERNATIONAL CONFERENCE PAPERS In English
• 1 P.E.M. Almeida and M. G. Simões Fundamentals
  Of A Fast Convergence Parametric CMAC Network,
  accepted for presentation at IJCNN2001
  (INNS-IEEE International Joint Conference on
  Neural Networks), Washington, DC, July 2001.
• 2 M. Godoy Simoes, J. L. M. Tiquilloca, H. M.
  Morishita, Neural network based prediction of
  mooring forces in floating production storage and
  offloading systems IEEE-IAS Annu. Meeting Conf.
  Rec., vol. 2, pp. 940-946, Rome, Italy, October
  2000.
• 3 M. Godoy Simoes, P. Vieira Jr., Model
  development and design of a wheel-motor drive
  system Proceedings of EPE - PEMC, vol. 5, pp.
  74-79, Kosice, Slovak Republic, September 5-7,
  2000
• 4 M. Godoy Simoes, Petronio Vieira Jr, A High
  Torque Low-Speed Multi-Phase Brushless Machine -
  A Perspective Application for Electric Vehicles
  IEEE-IECON International Conference on
  Industrial Electronics, Control and
  Instrumentation, Nagoya, Japan, October 2000.

34

• 5 S. Szafir and M. Godoy Simoes, Real time
  electrical motor control using DSP based system
  IEEE Industrial Conference INDUSCON 2000, vol. 1,
  pp. 59-64, Porto Alegre, Brazil, November 06-09,
  2000
• 6 M. Godoy Simões, N. N. Franceschetti, A RISC
  microcontroller based photovoltaic system for
  illumination applications IEEE-APEC Applied
  Power Electronics Conference, vol. 3, pp.
  479-485, New Orleans, Louisiana, February 6-10,
  2000
• 7 J. R. Pelaez, M. Godoy Simões A
  computational model of synaptic metaplasticity
  Proceedings of the International Joint Conference
  of Neural Networks. 1999, Paper number 103
  (CD-ROM Edition), Session 1.1, Washington D.C.
• 8 J. R. Pelaez, M. Godoy Simões Pattern
  completion through thalamo-cortical interaction.
  Proceedings of the International Joint Conference
  of Neural Networks. 1999, Paper number 102.
  (CD-ROM Edition), Session 1.3, Washington D.C.
• 9 J.R. Pelaez, M. G. Simoes, A neural network
  based intruder detection system 4o Brazilian
  Symposium on Intelligent Automation, September,
  1999, pp. 156-158, Sao Paulo, Brazil.
• 10 M. Milanova, P. E. M. Almeida, M. G. Simoes,
  Applications of cellular neural networks to
  image understanding, 4o Brazilian Symposium on
  Intelligent Automation, September, 1999, pp.
  19-29, Sao Paulo, Brazil.
• 11 M. Godoy Simoes, N. N. Franceschetti, M.
  Friedhofer, A fuzzy logic based photovoltaic
  peak power tracking controller IEEE-ISIE
  International Symposium on Industrial
  Electronics, vol. 1, pp. 300-305, Pretoria, South
  Africa, July/1998

35

• 12 C. Guestrin, F. G. Cozman, M. Godoy Simoes,
  Industrial applications of image mosaicing and
  stabilization IEEE-KES Knowledge-Based
  Intelligent Electronic Systems, vol. 2, pp.
  174-183, Adelaide, Australia, April/1998
• 13 M. Godoy Simoes, N.N. Franceschetti, J.C.
  Adamowsky, Drive system control and energy
  management of a solar powered electric vehicle
  IEEE-APEC Applied Power Electronics Conference,
  Vol. 1, pp. 49-55, Anaheim CA, February 15-19,
  1998
• 14 M. Friedhofer, M. Godoy Simoes, Decision
  criteria with different degrees of importance a
  contrast diffusion/intensification approach 3o
  Simpósio Brasileiro de Automação Inteligente
  (SBAI97) pp. 319-324, Vitoria (Brazil), Sept.
  1997
• 15 M. Godoy Simoes, N. N. Franceschetti, J. C.
  Adamowski, A photovoltaic based electric vehicle
  drive system, 30th Int. Symp. on Automotive
  Technology and Automation - ISATA, pp. 307-314,
  Florence, Italy, June 1997.
• 16 M. Godoy Simoes, Bimal K. Bose and Ron
  Spiegel, Design and Performance Evaluation of a
  Fuzzy Logic Based Variable Speed Wind Generation
  System, IEEE-IAS Annu. Meeting Conf. Rec., pp.
  349-356, San Diego, California, October 1996.
• 17 M. Godoy Simoes, Bimal K. Bose and Ron
  Spiegel, Fuzzy Logic Based Variable Speed Wind
  Generation System, XI Congresso Brasileiro de
  Automática, pp. 323-328, vol. 1, Sao Paulo
  (Brazil), Sept. 1996
• 18 M. Godoy Simoes and Bimal K. Bose,
  Application of fuzzy neural networks in the
  estimation of distorted waveforms IEEE
  International Symposium on Industrial
  Electronics, pp. 415-420, Warsaw Poland,
  June/1996.

36

• 19 M. Godoy Simoes and Bimal K. Bose, Fuzzy
  neural network based estimation of power
  electronic waveforms, III Congresso Brasileiro
  de Eletrônica de Potência (COBEP95), pp.
  211-216, Sao Paulo (Brazil), Dec. 1995.
• 20 G. C. D. Sousa, B. K. Bose and M. Godoy
  Simoes, A Simulation-implementation methodology
  of a fuzzy logic based control system, III
  Congresso Brasileiro de Eletrônica de Potência
  (COBEP95), pp. 223-228, Sao Paulo (Brazil), Dec.
  1995.
• 21 M.H. Kim, M. Godoy Simoes and B. K. Bose,
  Neural network based estimation of power
  electronic waves, IEEE/IECON Conf. Rec., pp.
  353-358, Orlando (USA), November 1995
• 22 B.K. Bose, M. Godoy Simoes, D.R. Crecelius,
  K. Rajashekara, R. Martin, Speed sensorless
  hybrid vector controlled induction motor drive,
  IEEE/IAS Annu. Meeting Conf. Rec., pp.137-143,
  Orlando (USA), October 1995.
• 23 M. Godoy Simoes, B.K. Bose, and Ron Spiegel,
  Fuzzy logic based intelligent control of a
  variable speed cage machine wind generation
  system, IEEE Power Electronics Specialists
  Conference, pp. 389-395, Atlanta (USA), June
  1995.
• 24 M. Godoy Simoes and B.K. Bose Neural
  network based estimation of feedback signals for
  a vector controlled induction motor drive,
  Industry Applications Society Annual Meeting
  (IEEE-IAS), vol. I, pp. 471-479, Denver (USA),
  Oct. 1994.
• 25 M. Godoy Simoes and B.K. Bose Application
  of fuzzy logic in the estimation of power
  eletronic waveforms Industry Applications
  Society Annual Meeting (IEEE-IAS), vol. II, pp.
  853-861, Toronto Canada, Oct. 1993.

37

• BOOK CHAPTERS
• 1 Speed Sensorless Hybrid Vector Controlled
  Induction Motor Drive
• Book Sensorless Control of AC Motor Drives,
  pages 119 to 125
• Edited by K. Rajashekara et al
• Publisher IEEE Press, 1996 ISBN 0-7803-1046-2
• 2 Neural Network Based Estimation of Feedback
  Signals for a Vector Controlled
• Induction Motor Drive
• Book Sensorless Control of AC Motor Drives,
  pages 248 to 257
• Edited by K. Rajashekara et al
• Publisher IEEE Press, 1996 ISBN 0-7803-1046-2
• SOUTH AND CENTRAL AMERICAN CONFERENCES In
  Portuguese and Spanish
• 1 J. L. M. Tiquilloca, Hélio M. Morishita,
  Marcelo G. Simões, Simulación Dinamica de
  Sistemas de Producción Flotante de Petróleo
  atraves de Redes Neuronales Artificiales,
  Dynamical simulation of oil well floating
  production systems with artificial neural
  networks, IV Jornadas Panamericanas de
  Automatización and V Jornadas de Sistemas de
  Instrumetación, Caracas, Venezuela, 8-12 de Mayo
  de 2000.
• 2 S. Szafir, M. Godoy Simoes, Proposta de
  sistema simulador da dinâmica de veículos
  elétricos baseado em processador digital de
  sinais, Proposal of a digital signal processing
  based simulator system for electric vehicle
  dynamics, 4o Simp. Bras. de Autom. Intel. 4o
  Brazilian Symp. on Int. Automation, September,
  1999, pp. 597-602, Sao Paulo, Brazil.

38

• 3 J. L. M. Tiquilloca, H. M. Morishita, M. G.
  Simoes, Análise Dinâmica de Sistemas de produção
  Flutuante de Petróleo através de Redes Neurais
  Artificiais Dynamical analysis of floating
  production oil systems with artificial neural
  networks 4o Simpósio Brasileiro de Automação
  Inteligente 4o Brazilian Symposium on
  Intelligent Automation, September, 1999, pp.
  144-149, Sao Paulo, Brazil
• 4 P. E. M. Almeida, M. G. Simoes, Projeto de
  um Sistema Robótico Inteligente para Instalação
  de Equipamentos em Poços petrolíferos em Águas
  Profundas, Design of an intelligent robotic
  system for installation of equipments in deep sea
  oil wells 4o Simpósio Brasileiro de Automação
  Inteligente 4o Brazilian Symposium on
  Intelligent Automation, September, 1999. pp.
  165-170, Sao Paulo, Brazil.
• 5 N.N. Franceschetti, L.O.M dos Reis, M. Godoy
  Simoes, Modelagem e simulação da transferência
  de potência de um sistema fotovoltaico Modeling
  and simulation of photovoltaic system power
  transference 4o Congresso Brasileiro de
  Eletrônica de Potência 4o Brazilian Power
  Electronics Conference (COBEP98) pp. 275-280,
  Belo Horizonte, Brazil, December 1-5, 1997
• 6 J. R. Peláez e M. Godoy Simoes, Um novo
  algoritmo de busca heurística baseado no
  processamento do córtex cerebral A new
  heuristic search algorithm based on the cerebral
  cortex processing 3o Simpósio Brasileiro de
  Automação Inteligente 3o Brazilian Symposium on
  Intelligent Automation (SBAI97) pp. 377-381,
  Vitória, Brazil, September 3-5, 1997

39

• 7 M. Godoy Simoes, L.E.B.da Silva , F.G.
  Cozman, V.F. Silva, Proposta de controlador
  adaptativo para acionamento de um VAT utilizando
  a técnica de modelo de referência Proposal of
  adaptive controller for AGV drive system with a
  reference model technique, II Seminário
  Internacional de Motores Elétricos e Acionamentos
  Reguláveis, II International Seminar in Electric
  Motors and Regulated Drives (SIMEAR97) vol.3,
  p. 227-241, May, 1991
• 8 M. Godoy Simões and N.N. Franceschetti,
  Medição de corrente contínua com isolação
  aplicada à malha de torque de um servomotor cc
  Measurement of continuous current with isolation
  applied to the torque loop of a cc servomotor,
  II International Seminar in Electric Motors and
  Regulated Drives (SIMEAR97), vol. 3 p. 115-127,
  May, 1991
• 9 M. Godoy Simões, J.C. Adamowski and F.G.
  Cozman, Estratégia de acionamento de motores em
  veículos autônomos de transporte Motor drive
  system strategy for autonomous guided vehicles,
  4o Congresso Nacional de Automação Industrial,
  4o National Industrial Automation
  Congress(CONAI), pp. 214-219, July 1990
• 10 M. Godoy Simões, M. Martucci Jr., Análise
  do desempenho de conversores chaveados visando a
  automação de projeto Performance analysis of
  switching converters aiming the automated
  design, 4o. Congresso Nacional de Automação
  Industrial, 4o National Industrial Automation
  Congress (CONAI), pp. 316-326, July 1990
• 11 J.C. Adamowski, M. Godoy Simões and F.G.
  Cozman Desenvolvimento de um robô móvel
  Mobile robot development, 4o. CLACA - Cong.
  Latino Americano de Control Automático, Nov.
  1990, Puebla-México, vol. 1 pp. 213-217, also
  published in 8o. CBA - Congresso Brasileiro de
  Automática, vol. 1 pp. 513-517, Sept. 1990, and
  in 4o. CONAI - Congresso Nacional de Automação
  Industrial, pp. 209-213, July 1990

40

• 12 F.G. Cozman, M.R.P. Barreto, P.E. Miyagi,
  J.C. Adamowski, M. Godoy Simões and L.A. Moscato
  O projeto de veículos autônomos de transporte
  The project of autonomous vehicles for
  transportation, Simp. de Autom. Int. (SAI), pp.
  119-123, Curitiba, July 1990
• 13 M. Godoy Simões, J.C. Adamowski and F.G.
  Cozman Acionamento e controle de motores para
  veículos autônomos de transporte Drive system
  motor control for autonomous guided vehicles II
  Seminário de Eletrônica de Potência (SEP), pp.
  190-197, UFSC, Florianópolis, December 1989
• 14 M. Godoy Simões and P.E. Miyagi
  Medianização aplicada em conversores chaveados
  Aplicattion of state space averaging in
  swicthing converters, 1o. Encontro Regional de
  Automação e Instrumentação (ERAI), pp.
  TMS01-TMS07, August 1989
• 15 M. Godoy Simões and M. Martucci Jr.
  Automação da análise e modelamento de
  conversores chaveados Automation of analysis
  and modeling of switching power converters, 3o.
  Congresso Nacional de Automação Industrial
  (CONAI), pp. 154-167, September 1988
• 16 M. Godoy Simões and M. Martucci Jr.
  Topologias de conversores chaveados Switching
  power converters topologies, 4o. Congresso de
  Iniciação Científica e Tecnológica em Engenharia
  (CICTE), São Carlos, December 1985
• 17 M. Godoy Simões and M. Martucci Jr.,
  Acionamento de motores de passo Stepping
  motors drives, 4o. Congresso de Iniciação
  Científica e Tecnológica em Engenharia (CICTE),
  São Carlos, December 1985
• 18 M. Godoy Simões M. Martucci Jr., Fontes
  chaveadas para alimentação de sistemas digitais
  Switching power supplies for digital systems,
  3o. Congresso de Iniciação Científica e
  Tecnológica em Engenharia (CICTE), São Carlos,
  December 1984

41

• TECHNICAL MAGAZINES PUBLICATIONS (PORTUGUESE
  DIVULGATION)
• 1 M. Godoy Simoes, Petronio Vieira Jr.
  Acionamento de Veículos Elétricos Electric
  vehicles drives , Revista de Automação
  Industrial, no. 3, pp. 16-21, July/August, 1998.
• 2 M. Godoy Simoes, Ian S. Shaw As Vantagens da
  Aplicação da Lógica Fuzzy em Controle de
  Processos The advantages of applying fuzzy logic
  in process control, Revista Eletricidade
  Moderna, pp. 108-115, February/1998
• 3 M. Godoy Simoes, N.N. Franceschetti, J.C.
  Adamowsky Veículo Solar Solar Vehicle, Revista
  Saber Eletrônica no. 300, pp. 1-7, January/1998
• 4 M. Godoy Simoes, R. C. Giacomini Software
  para Robótica Software for Robotics, Revista
  Controle e Instrumentação no. 191, 1987
• 5 M. Godoy Simoes Configurações de Fontes
  Chaveadas Switching Power Supplies
  Configurations, Revista Nova Eletrônica no. 114,
  1986
• 6 M. Godoy Simoes Teoria de Fontes Chaveadas
  Switching Power Supplies Theory, Revista Nova
  Eletrônica, no. 101, 1985

42

•  List of Articles Paulo E. M. Almeida
•  
• 1 Almeida, Paulo E. M. et alli. Ambiente
  Integrado para Análise e Desenvolvimento de
  Controladores Difusos, I Simpósio Brasileiro de
  Automação Inteligente, pp. 291-300, 1993 (In
  Portuguese).
• 2 Almeida, Paulo E. M. Implementação de um
  Ambiente de Desenvolvimento de Controladores
  Difusos e suas Aplicações em Controle de
  Processos Reais, Master Thesis no. 147,
  P.P.G.E.E. / E.E.-U.F.M.G., 1996 (In
  Portuguese).
• 3 Almeida, Paulo E. M. et alli. Utilização de
  um Ambiente de Desenvolvimento de Controladores
  Difusos em Controle de Processos Reais, I
  Congresso Mineiro de Automação, pp.165-174, 1996
  (In Portuguese).
• 4 Almeida, Paulo E. M. et alli. A Novel Real
  Time Integrated Environment for the Design of
  Practical Fuzzy Controllers. IEEE Second
  International Conference on Knowledge-Based
  Intelligent Electronic Systems, pp. 155-164,
  Adelaide, AUSTRÁLIA, 1998.
• 5 Meireles, Magali R. G., Almeida, Paulo E. M.
  et alli. Utilização de Lógica Difusa para o
  Controle de um Processo de Geração de Vapor, II
  Congresso Mineiro de Automação, pp. 267-278, Belo
  Horizonte, MG, 1998 (In Portuguese).
• 6 Meireles, Magali R. G., Almeida, Paulo E. M.
  et alli. Identificação e Controle por Lógica
  Difusa da Malha de Combustível de um Processo de
  Geração de Vapor, XII Congresso Brasileiro de
  Automática, Uberlândia, MG, 1998 (In Portuguese).

43

•  
• 7 Almeida, P. E. M. PEREIRA, P. T.
  Mapeamento de Sinais RF de Telefonia Celular
  através de Redes Neurais de Base Radial, IV
  Simpósio Brasileiro de Automação Inteligente, pp.
  407-412, São Paulo, Setembro, 1999 (In
  Portuguese).
• 8 Milanova, M., Almeida, P. E. M. SIMÕES, M.
  G. Applications of Cellular Neural Networks to
  Image Understanding, artigo apresentado em
  palestra convidada no IV Simpósio Brasileiro de
  Automação Inteligente, pp. 19-29, São Paulo,
  Setembro, 1999 (In Portuguese).
• 9 Milanova, M., Almeida, P. E. M. et alli.
  Applications of Cellular Neural Networks for
  Shape from Shading Problem. In PERNER, P. e
  PETROU, M. (Eds.) International Workshop on
  Machine Learning and Data Mining in Pattern
  Recognition, Lecture Notes in Artificial
  Intelligence, Springer-Verlag, pp. 52-63,
  Leipzig, Germany, September, 1999.
• 10 Almeida, P. E. M. Simões, M. G.
  Fundamentals of a Fast Convergence Parametric
  CMAC Network, To be presented at IJCNN01,
  Washington, July, 2001.

44

•  List of Articles Gilberto C. Drumond Sousa
•  
• 1 G. C. D. Sousa, B. K. Bose, J. G. Cleland,
  "Fuzzy logic based on-line efficiency
  optimization control of an indirect vector
  controlled induction motor drive", IEEE
  Transactions on Industrial Electronics, Vol. 42
  No. 2, pp. 192-198, abril de 1995.
• 2 G. C. D. Sousa, A. P. S. Santos, and A. B.
  Guimarães. "Vector-Controlled Drive System with
  Bi-directional Power flow and Unity Power
  Factor", Anais do Congresso Brasileiro de
  Eletrônica de Potência (COBEP 95), pp. 95-100,
  São Paulo, SP, dezembro de 1995.
• 3 G. C. D. Sousa, B. K. Bose, and M. G.
  Simões, "A simulation-implementation methodology
  of a fuzzy logic based control system", Anais do
  Congresso Brasileiro de Eletrônica de Potência
  (COBEP 95), pp. 223-228, São Paulo, SP, dezembro
  de 1995.
• 4 G. C. D. Sousa, "Fuzzy Logic Applications in
  Power Electronics and Drives-An Overview", Proc.
  of the 1995 Intern. Conf. on Ind. Electronics,
  Control, Instrumentation and Automation (IECON'
  95), pp. 57-62, Orlando, FL, 1995.
• 5 G. C. D. Sousa, "Fuzzy Logic in Power
  Electronics and Drives", Fuzzy Logica de
  Elektrische Energietechniek, Leuwarden, Holanda,
  April, 1996.
• 6 G. C. D. Sousa, B. K. Bose, M. G. Simões, "A
  Simulation-Implementation Methodology of a Fuzzy
  Logic Based Control System", Eletrônica de
  Potência - SOBRAEP, Vol.2, No. 1, junho de 1997,
  pp. 61-68.
• 7 G. C. D. Sousa, D. R. Errera, "A High
  Performance Dynamometer for Drive Systems
  Testing", 23rd Int. Conf. on Industrial
  Electronics, Control, and Instrumentation,
  (IEEE-IECON'97) Conference Records, pp. 500-504,
  New Orleans, Nov., 1997.

45

• 8 A. L. Rabello, M. A. Có, G. C. D. Sousa, J.
  L. F. Vieira, "A Fully Protected Push-Pull
  Current Fed DC-DC Converter ", 23rd Int. Conf.
  on Industrial Electronics, Control, and
  Instrumentation, (IEEE-IECON'97) Conference
  Records, pp. 587-592, New Orleans, Nov., 1997.
• 9 G. C. D. Sousa, F. A. Ferreira, "Controle
  Vetorial Direto Aplicado a um Conversor PWM
  Utilizando DSP Análise, Implementação e
  Resultados", 4o Congresso Brasileiro de
  Eletrônica de Potência (COBEP' 97), pp. 243-246,
  Belo Horizonte, Dez. 1997.
• 10 G. C. D. Sousa, D. R. Errera, "A High
  Performance Test Bench for Drive Systems
  Development", 4o Congresso Brasileiro de
  Eletrônica de Potência (COBEP' 97), pp. 243-246,
  Belo Horizonte, Dez. 1997.
• 11 D. S. L. Simonetti, M. C. Azevedo, G. C. D.
  Sousa, J. L. F. Vieira "A Single Switch
  Three-Phase Boost Rectifier with Constant Input
  Harmonic Content", 24rd Int. Conf. on Industrial
  Electronics, Control, and Instrumentation,
  (IEEE-IECON'98) Conference Records, pp. 691-696,
  Aachen, Alemanha, Set., 1998.
• 12 C. R. Cavati and G. C. D. Sousa, "Load
  Demand Level Estimation in Power Distribution
  Systems by Fuzzy Inference", Intelligent System
  Application to Power Systems (ISAP'99) Conference
  Records, pp. 355-359, Rio de Janeiro, April,
  1999.
• 13 G. C. D. Sousa and A. P. S. S. Rabello, "
  Application of the Luenberger Observer to the
  Sensorless Speed Control of an Induction Motor
  Drive Analysis and Implementation", 5o
  Congresso Brasileiro de Eletrônica de Potência
  (COBEP' 99), pp. 681-686, Foz do Iguaçu, Sept.
  1999.

46

• 14 G. C. D. Sousa and N. S. Marcellos,
  "Application Aspects of Modern PWM AC Motor Drive
  Systems. Part I Coupling Currents and Bearing
  Problems ", 5o Congresso Brasileiro de Eletrônica
  de Potência (COBEP' 99), pp. 825-830, Foz do
  Iguaçu, Set. 1999.
• 15 G. C. D. Sousa and N. S. Marcellos,
  Application Aspects of Modern PWM AC Motor Drive
  Systems Part II Overvoltages and EMI Problems ",
  5o Congresso Brasileiro de Eletrônica de
  Potência (COBEP' 99), pp. 831-835, Foz do Iguaçu,
  Set. 1999.
• 16 D. S. L. Simonetti, J. L. F. Vieira, G. C.
  D. Sousa, "Modeling of the High-Power-Factor
  Discontinuous Boost Rectifiers, IEEE Transactions
  on Industrial Electronics, Vol. 46 No. 4, pp.
  788-795, August, 1999.