Autotuner for fuzzy controller-relay based approach
A. Makkonen, Heikki N. Koivo · 2002
The paper suggests an automatic tuning method for fuzzy controller of an unknown system. Tuning is composed of rough tuning and fine tuning phases. The main idea is to obtain a second-order model for the process from two points on the Nyquist plane and to perform optimization of the fuzzy controller rule-base with this model. The two frequency points are found using a simple estimation technique from relay control results.>