Abstract
This paper proposes a new modeling technique and control system design for a flexible rotor using active magnetic bearings to control its elastic modes. The purpose of research is to pass through critical speeds caused by elastic modes of the rotor in order to obtain a high-speed rotation. To achieve this purpose, it is necessary to control not only motion but also vibration, because rotational motion affects on vibration. The new modeling method called as an extended reduced order physical model which simultaneously express motion and vibration of the rotor is used. Furthermore, a new controller combined PID with LQ control to flexible rotor is applied.
