Redused rules fuzzy logic based control of boost DC DC converter

Abstract EN

This paper proposes a boost DC / DC converter control in which the fuzzy logic has been implemented with reduced number of rules.

The reduction of rules has been done through the elimination of those belong to the far from the set point area and directly feeding the membership values of the corresponding fuzzy labels into the defuzzification stage.

The proposed controller generates a duty ratio control signal through the addition of weighted part of the input voltage and of the low pass filtered signal of the inductor current to that of the fuzzy which has been fed by voltage error signal and a one represents the differences of the output voltage from its low pass filtered version.

The simulation results proved that this controller has added significant improvements to the dynamic performances of the well known PI like fuzzy controller which uses the output voltage error and its rate of change as an inputs.

The controlled boost DC / DC converter exhibited excellent performances under small and large disturbances of the input voltage and output load resistance and also showed good reference tracking ability.