TY - JFULL AU - Tooraj Hakim Elahi and Abdolamir Nekoubin PY - 2011/11/ TI - Optimal Controller Design for Linear Magnetic Levitation Rail System T2 - International Journal of Electrical and Computer Engineering SP - 1138 EP - 1143 VL - 5 SN - 1307-6892 UR - https://publications.waset.org/pdf/13590 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 58, 2011 N2 - In many applications, magnetic suspension systems are required to operate over large variations in air gap. As a result, the nonlinearities inherent in most types of suspensions have a significant impact on performance. Specifically, it may be difficult to design a linear controller which gives satisfactory performance, stability, and disturbance rejection over a wide range of operating points. in this paper an optimal controller based on discontinuous mathematical model of the system for an electromagnetic suspension system which is applied in magnetic trains has been designed . Simulations show that the new controller can adapt well to the variance of suspension mass and gap, and keep its dynamic performance, thus it is superior to the classic controller. ER -