A Novel High Order Sliding Mode Control of Magnetic Levitation System in Matlab

A robust high-order sliding mode control scheme, based on the super twisting control (STC) method, is proposed for the position control of the magnetic levitation (MAGLEV) system. The developed control has been proposed in [1] for second order system is extended to the third order system. The sliding surface is modified by using homogeneity principle. The proposed controller guarantees the finite-time reachability, effective disturbance rejection and continuous control without chattering. The closed loop stability and reaching time estimation of the states are analyzed by the Lyapunov stability theorem. An example of a magnetic levitation system is given and simulation results are included to verify the performance of the proposed controller.