Abstract
Active Magnetic Bearing (AMB) controller can be designed based on linear or non-linear control theory. An example of the former is the PID control that is the most popular and widely used in industries. Variable Structure Control (VSC) is including in the latter. In this study, we added the VSC to an AMB-equipped flexible rotor under the PID control. The sensitivity function is generally recommended for evaluating the stability margin of the AMB linear system, we apply this function even to the non-linear system including the VSC.
