Control Using Sliding Mode Of the Magnetic Suspension System

This paper presents a proposition of sliding mode position controller of the magnetic suspension ball system . The magnetic suspension system (MSS) is a mechatronic system already acknowledged and accepted by the field experts. The design of a controller keeping a steel ball suspended in the air. In the ideal situation, the magnetic force produced by current from an electromagnet will counteract the weight of the steel ball. Nevertheless, the fixed electromagnetic force is very sensitive, and there is noise that creates acceleration forces on the steel ball, causing the ball to move into the unbalanced region. The main function of the sliding mode control (SMC) Controller is to maintain the balance between the magnetic force and the ball's weight. The proposed controller guarantee the asymptotic regulation of the states of the system to their desired values. Complete mathematical models of the electrical, mechanical and magnetic suspension system are also developed. The design and simulations are performed under a Matlab/Simulink models computer package, allows us to examine the performance of this technique: improvement of the stability and the dynamic response. Index Term-Magnetic suspension system S liding Mode Control – S tability and performance simulation.