Type-2 Fuzzy Logic
Oscar Castillo, Patricia Melín · Studies in fuzziness and soft computing · 2003
We describe in this chapter a new area in fuzzy logic, which studies type-2 fuzzy sets and type-2 fuzzy logic systems. Basically, a type-2 fuzzy set is a set in which we also have uncertainty about the membership function. Of course, type-2 fuzzy systems consist of fuzzy if-then rules, which contain type-2 fuzzy sets. We can say that type-2 fuzzy logic is a generalization of conventional fuzzy logic (type-1) in the sense that uncertainty is not only limited to the linguistic variables but also is present in the definition of the membership functions. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.