Sensorless active magnetic dampers for the control of rotors

A phase of experimental identification of actuator parameters is performed on the open-loop system response to improve the reliability of the model. The effectiveness of the proposed method is evaluated experimentally by measuring unbalance response in open and closed-loop configuration showing a reduction of displacement during critical speed crossing from 0.35 mm to 0.04 mm. Furthermore, a classical AMD realized with the use of position sensors is implemented on the same rotor. The results obtained with sensed and self-sensing controls are compared to show the good quality of the damping performance reached with the proposed self-sensing technique.