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Computational Intelligence
Parveen Malik
Assistant Professor
School of Electronics Engineering
KIIT University
Outline
• Fuzzy Inference system – Introduction
• Fuzzy Inference system – Applications
• Fuzzy Inference system – Block Diagram
• Fuzzy Inference system - Types
• Defuzzification
Fuzzy Inference system (FIS)
Introduction
FIS is also Known as fuzzy-rule based system, fuzzy expert
system, fuzzy model, fuzzy associative memory ,fuzzy logic
Controller and Fuzzy system.
Basic Structure of a FIS consist of :
• Rule Base – contains selections of fuzzy rules
• Database or Dictionary – defines membership functions
• Reasoning Mechanism – performs fuzzy reasoning
Fuzzy Inference system (FIS)- Applications
Data Classification
Fuzzy Inference
system
Automatic Control
Expert Systems
Time-Series Prediction
Pattern Recognition Robotics
Decision Analysis
Fuzzy Inference System (Block Diagram)
𝒙 𝒊𝒔 𝑨𝟐
𝒙 𝒊𝒔 𝑨𝟏
𝒙 𝒊𝒔 𝑨𝒓
𝒚 𝒊𝒔 𝑩𝟏
𝒚 𝒊𝒔 𝑩𝟐
𝒚 𝒊𝒔 𝑩𝒓
Rule 1
Rule r
Rule 2
Aggregator Defuzzification
⋮ ⋮ ⋮
X
Crisp or Fuzzy
(Fuzzy)
(Fuzzy)
(Fuzzy)
(Fuzzy) (Crisp)
Fuzzy Inference system - Types
Mamdani FIS Sugeno FIS Tsukamoto FIS
Fuzzy Inference system

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Lecture 3 fuzzy inference system

  • 1. Computational Intelligence Parveen Malik Assistant Professor School of Electronics Engineering KIIT University
  • 2. Outline • Fuzzy Inference system – Introduction • Fuzzy Inference system – Applications • Fuzzy Inference system – Block Diagram • Fuzzy Inference system - Types • Defuzzification
  • 3. Fuzzy Inference system (FIS) Introduction FIS is also Known as fuzzy-rule based system, fuzzy expert system, fuzzy model, fuzzy associative memory ,fuzzy logic Controller and Fuzzy system. Basic Structure of a FIS consist of : • Rule Base – contains selections of fuzzy rules • Database or Dictionary – defines membership functions • Reasoning Mechanism – performs fuzzy reasoning
  • 4. Fuzzy Inference system (FIS)- Applications Data Classification Fuzzy Inference system Automatic Control Expert Systems Time-Series Prediction Pattern Recognition Robotics Decision Analysis
  • 5. Fuzzy Inference System (Block Diagram) 𝒙 𝒊𝒔 𝑨𝟐 𝒙 𝒊𝒔 𝑨𝟏 𝒙 𝒊𝒔 𝑨𝒓 𝒚 𝒊𝒔 𝑩𝟏 𝒚 𝒊𝒔 𝑩𝟐 𝒚 𝒊𝒔 𝑩𝒓 Rule 1 Rule r Rule 2 Aggregator Defuzzification ⋮ ⋮ ⋮ X Crisp or Fuzzy (Fuzzy) (Fuzzy) (Fuzzy) (Fuzzy) (Crisp)
  • 6. Fuzzy Inference system - Types Mamdani FIS Sugeno FIS Tsukamoto FIS Fuzzy Inference system