Fuzzy systems with defuzzification are universal approximators

  • Authors:
  • J. L. Castro;M. Delgado

  • Affiliations:
  • Dept. de Ciencias de la Comput. e Inteligencia Artificial, Granada Univ.;-

  • Venue:
  • IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics
  • Year:
  • 1996

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Abstract

In this paper, we consider a fundamental theoretical question: Is it always possible to design a fuzzy system capable of approximating any real continuous function on a compact set with arbitrary accuracy? Moreover, we research whether the answer to the above question is positive when we restrict to a fixed (but arbitrary) type of fuzzy reasoning and to a subclass of fuzzy relations. This result can be viewed as an existence theorem of an optimal fuzzy system for a wide variety of problems