High Performance Voltage Control Using Feedback Linearization

In this paper, a feedback linearization controller is presented for a single DOF magnetic bearing test rig. The feedback linearization controller is derived from a detailed nonlinear electromagnet model using both analytic relationships and experimental calibration data. A high performance controller for the feedback linearized plant is designed with m-synthesis to guarantee a beam compliance performance specification. Experimental results demonstrate that the m controller with feedback linearization achieves the performance specified during design for the nonlinear plant independent of the disturbance force level or displacement incurred.