A Q-value Measurement for Damping Evaluation and Rotational Test of Over-Hung Rotor Supported by AMBs

Abstract

In recent years, Active Magnetic Bearings (AMBs) characterized by non-contact support without mechanical loss have been applied in industrial rotors. The purpose of this research is to develop a flexible, overhanging rotor supported by AMBs to pass smoothly the 2nd bending mode critical speed. This paper deals with the following topics : (1) Controller design based on the phase adjustment method and the evaluation of the designs using sensitivity functions, (2) Evaluation of the designs using a new method, called Q-value function, and (3) Application of modal balancing method to pass the 2nd bending mode critical speed.