Robust H-Infinity Control for Magnetic Levitation System

This paper studies Quancer Magnetic levitation plant and proposed a robust control for the system using H-infinity approach. The performance and robustness of the proposed method was compared with the existing Proportional Integral Velocity (PIV) + Feed-forward (FF) control designed by the manufacturer. The performance analysis of the existing PIV+FF controller was made to build the desired specification template. A dynamic state feedback controller satisfying H-infinity performance, that is numerically solved using Riccati approach was designed. Simulation results obtained, shows superior robustness to uncertainties of the proposed control over the existing control with sufficient tracking performance.