Heuristic linearization of external characteristics of DC-DC converters using fuzzy control

The design of fuzzy logic controllers used to linearize the family of external characteristics of DC-DC converters that work in discontinuous-conduction mode is described in this paper. Simulation study with centered triangular, trapezoidal and Gaussian fuzzy sets justify the choice of triangular membership functions, except the limits of the universe of discourse where Gaussian membership functions suit better. Results demonstrate that fuzzy logic control is a good alternative for conventional control methods. Compared to other intelligent control techniques, the heuristic fuzzy logic algorithm is faster because for any given input data, it processes structured knowledge using only four valid rules from the whole rule base.