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Abstract

Design of Robust Fixed-Structure Hinfinity Control for a Current-Mode Boost Converter using Genetic Algorithms

H control is the one of popular techniques for controlling system. However, robust controller designed by conventional H infinity control results in high order and complicated structure. It is not easy to implement this controller in practical work. TO overcome this problem, we propose a genetic algorithm based fixed-structure H infinity loop shaping control to design a robust controller for a current mode boost converter. The infinity norm of the transfer function from disturbance to output is subjected to be minimized using genetic algorithm. Simple structure and robust controller can be achieved by the proposed technique. In this paper, the designed controller is implemented on an average current mode control of 300W boost converter. Robustness against parameter changing and disturbance is clearly shown in experimental results. Simulation results are also shown for comparison and prove the effectiveness of our technique.