Design and Simulation of Type two fuzzy Logic based PD controller for Variable Speed Rotation Active Magnetic Bearing System Subject to Random Disturbance


Abstract –In this paper the design of type-2 fuzzy logic based PD controller for an active magnetic bearing system (AMB) is presented. Such a system is known to be inherently unstable. The logic techniques of the proposed method continuously observes the error signal and it's change in order to modify the parameters of a PD controller. An improved tracking performance has been achieved. Robustness against disturbance effects with various rotation speeds has also been noticed. Comparison with a regular fuzzy like PD controller shows a noticeable improvement in the tracking performance of the system, especially in the presence of disturbances. In order to ensure the stability of the system, a pole placement controller is designed first before applying the type-2 fuzzy logic PD controller.