Interval Type‐2 Fuzzy Logic Controllers
Jerry M. Mendel, Hani Hagras, Woei‐Wan Tan, William Melek, Hao Ying · 2014
This chapter begins with short reviews of T1 Mamdani and TSK FLCs so as to set the stage for the complete descriptions of IT2 Mamdani and TSK FLCs. It focuses on the Wu–Mendel uncertainty bounds (WM UBs), which have let IT2 Mamdani FLCs run in real time. The chapter discusses about control performance for Interval Type-2 Fuzzy Logic Controllers (IT2 FLCs). It describes the two ways to determine FOU parameters of IT2 FLCs. The iterative nature of the EKM algorithms introduces time delays that may lead to unpredictability, reduced performance, or even system instability in a fuzzy logic control system.