Magnetic Levitation System Control Strategy Based on Backstepping Technique to Design Sliding Mode Controller

Magnetically levitated ball is a highly nonlinear system in nature in presence of disturbances. In this paper first backstepping controller is designed and system behavior is observed. After that a Sliding Mode Controller (SMC) having a Proportional Integral Derivative (PID) sliding surface based on the backstepping technique is designed. The tracking of the magnetic ball is more accurate using Backstepping based Sliding Mode Controller in comparison to the backstepping controller with pulse signal as disturbance. Simulation results show the effectiveness of the proposed control scheme.