ON THE VIBRATION AND CONTROL OF A FLEXIBLE ROTOR MOUNTED ON FLUID FILM BEARINGS

In this paper, an active vibration controller for controlling the dyna mics of a flexible rotor running in flexibly-mounted journal bearings is addressed. The control effort consists of two components. The first is a state feedback controller designed to stabilize the system and t o achieve desirable transient response. The second is a feed-forward c ontroller, based on the state of the excitation model, designed to cou nteract the effect of the external excitations on the system. The resu lts have shown that a significant improvement in the system response i s achieved by a stationary compensation of the selected set of excitat ion frequencies. (C) 1997 Elsevier Science Ltd.