Finite element modeling and unbalance compensation for a two disks asymmetrical rotor system

In this work a LQR scheme for vibration control in a rotor system is presented. The rotor system has two disks in an asymmetrical configuration along the shaft and its model is obtained by applying finite element techniques. A reduced order model of seven degrees of freedom is experimentally validated for the synthesis of active LQR control laws, using both an output feedback (one disk displacement) and an estimated state feedback controller. The controller is tuned to reduce the vibrations caused by the rotor imbalance in the two disks using only an actuator (active magnetic bearing). Some simulation and experimental results are included to show the transient and steady-state behavior of the overall closed loop system.