Design and Analysis of Robust H-infinity Controller

Abstract

This paper presents a simplified step by step procedure for the design of H_? controller for a given system.  H_? control synthesis is found to guarantee robustness and good performance.  It provides high disturbance rejection, guaranteeing high stability for any operating conditions. H infinity controller can be designed using various techniques, but H infinity loop shaping finds wide acceptance since the performance requisites can be incorporated in the design stage as performance weights.  Here this technique has been utilized to address some simple problems. Simulation results are given in the end to verify the validity of technique.

Keywords: H-infinity, loop shaping, weight selection, robust control, sensitivity