Signed-Distance Fuzzy-Logic Sliding-Mode Control Strategy for Floating Interleaved Boost Converter

This article proposes a cascade control scheme of a floating interleaved boost converter consisting of a signed distance/single input FLC as an outer voltage control loop and two sliding mode controllers as an inner current control loop. Typically, the fuzzy logic controllers are designed using two-input variables, hence, a high number of fuzzy rules is needed, increasing the complexity and the rules tuning. The adopted signed distance fuzzy logic concept in this paper allows reducing the fuzzy rules number and consequently the tuning complexity. Besides the simplicity of design, many other advantages are offered by the proposed control strategy such as robustness against external disturbance and parameters variation. Computer simulations using Matlab/Simulink software were carried out to validate the efficiency and the effectiveness of the suggested strategy.