Standard Article

Fuzzy Logic Control Systems

  1. Sukumar Kamalasadan1,
  2. Khalid S. Al-Olimat2

Published Online: 16 MAR 2009

DOI: 10.1002/9780470050118.ecse166

Wiley Encyclopedia of Computer Science and Engineering

Wiley Encyclopedia of Computer Science and Engineering

How to Cite

Kamalasadan, S. and Al-Olimat, K. S. 2009. Fuzzy Logic Control Systems. Wiley Encyclopedia of Computer Science and Engineering. 1344–1355.

Author Information

  1. 1

    University of West Florida, Pensacola, Florida

  2. 2

    Ohio Northern University, Ada, Ohio

Publication History

  1. Published Online: 16 MAR 2009


This article explains fuzzy controllers and general fuzzy systems. It emphasizes the basic idea of fuzzy control and the mathematics behind the concept. The article is divided into two sections. In the first part, the mathematics of fuzzy systems is discussed, which includes the definitions and basics of fuzzy expert systems, general fuzzy systems, and their properties. In the second part, the concept of fuzzy control are detailed which include the selection of inputs and outputs, enhancing control knowledge as a rule base, determining which rules to use, determining conclusions, converting decisions into actions, and graphical visual representation of fuzzy control operation. Then, various fuzzy control techniques and the essence of how fuzzy systems can be used for a wide range of control architectures are explained. The article concludes with the summary and future prospects of fuzzy logic systems.


  • fuzzy logic;
  • fuzzy control;
  • fuzzy logic control;
  • control systems;
  • intelligent control;
  • fuzzy systems;
  • fuzzy sets