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Control strategies for magnetic bearings often focus on linear optimal control techniques. While these methods afford many advantages, the literature is conspicuously sparse with regard to attempts at nonlinear control. Here, we treat the equations of motion of a rigid, horizontal rotor magnetic bearing system. Through feedback linearization and sliding mode control techniques, we formulate a nonlinear control law which maintains the shaft centered in the bearings. This system is then simulateddoi:10.1109/20.364771 fatcat:4j4p5x4dcrgexb3xn3s3y3zpcy