Control of single axis magnetic levitation system using fuzzy logic control

This paper presents an investigation into a system model for the stabilisation of a Magnetic Levitation System (Maglev´s). The magnetic levitation system is a challenging nonlinear mechatronic system in which an electromagnetic force is required to suspend an object (metal sphere) in the air. The electromagnetic force is very sensitive to the noise which can create acceleration forces on the metal sphere, causing the sphere to move into the unbalanced region. Maglev´s benefits the industry and the system has reduced power consumption, has increased power efficiency and reduced cost maintenance. The common applications for Maglev´s Power Generation (e.g. wind turbine), Maglev´s trains and Medical Device (e.g. Magnetically suspended Artificial Heart Pump). This paper presents comparative assessment of controllers for magnetic levitation dynamic response and robust characteristics of conventional PD and fuzzy PD. The main contribution of this paper is a robust fuzzy PD stabilisation scheme.