An iterative identification and control design method based on ν-gap metric

An iterative identification and control design method based on nu-gap is proposed for ensuring the stability of closed-loop system and control performance improvement. The method use the last designed controller to control the real plant, and to identify an uncertain model set that contains the real system. And then, redesign controller stabilizes the model set. At the same time, iterative closed-loop performance improvement condition and controller design method are proposed. Simulation result shows that the proposed method is available.