A Fuzzy Tuner for Fuzzy Logic Controllers

A two-level fuzzy tuning scheme is presented in this paper. The fuzzy tuner in the upper level is used to design the membership functions of the fuzzy logic controller in the lower level. The scheme provides an effective means for obtaining a good performance of the controller in a short time with a low computational burden. The upper and lower levels have a similar structure for the fuzzy inference, and thus the implementation of the scheme becomes easy. It can also be used in real time when the system parameters are time varying. A series of simulations are presented to illustrate the proposed scheme.