The Dynamics of a Cracked Rotor with Active Feedback Control System

The dynamical characteristics of a cracked rotor with an active feedback control system(AFCS) are theoretically analyzed in this paper. The effects of control algorithms and controller parameters on dynamical characteristics of the cracked rotor are discussed. It is shown that the dynamical characteristics of the cracked rotor with AFCS are obviously complex than that of the traditional cracked rotor system. The fault characteristics of the cracked rotor, which are often used to diagnose the crack, will depend on the control algorithm used. Therefore, it is very difficult to diagnose the crack in the rotor system with AFCS. If the effect of the crack is not considered in designing the controller, the rotor system will lose stability in some cases when cracks appear.