Design of Generalized Minimum Variance Control against Load-Disturbance for Time Varying System

Abstract

The proposed GMVC can be applied to the time varying system. The GMVC has the tracking performance against the reference change and a load disturbance in time varying system.Turning performance due to ship's steering is different from each steering angle. Therefore, the turning performance due to steering is time varying system. First, this study identifies the ship's maneuverability, which is expressed as Auto-Regressive eXogeneous (ARX) model, by each steering angle. Second, time varying parameters of ARX model are verified. Finally, this study designs a control system for the time varying steering system. The angular velocity of turning is controlled by applying Generalized Minimum Variance Control (GMVC) for time varying system. Especially, GMVC is arranged the polynomial's multiply for the time varying steering system.The proposed GMVC can be applied to the ship's steering of time varying system. The GMVC can stable steer the ship when a gust of wind is received.