Identification and robust control of a quadratic DC/DC boost converter by Hammerstein model

This paper deals with the theoretical framework definition and the experimental application of the Hammerstein identification and related robust control technique to a quadratic DC-DC single switch boost converter. A set of 4th order transfer functions has been identified with the Hammerstein approach, on the basis of a PRBS excitation signal. The set of identified transfer functions has been then used to design a suitable robust control technique, able to properly deals with converter´s parameters uncertainty and load variation. The proposed approach has been tested in numerical simulation and validated experimentally on suitably developed test set-up. It has been further compared with a classic PI controller.