Performance comparison of Type-1 and Type-2 fuzzy logic systems

Fuzzy Logic concepts have been applied with great success in many world applications. The majority of fuzzy logic system (FLS) so far has been used Type-1 FLS. However, Type-1 FLS cannot handle the high level of uncertainties available in the system (plant). A new concept named as interval Type-2 FLS has been developed due to its uncertainties handling capacity. In this paper, Type-1 and Type-2 FLS are developed and designed for pitch angle controlled wind energy system as an application to investigate their performance. The results show that the Type-2 fuzzy logic controller offers better performance than the Type-1 FLS.