Abstract
This research aims at reducing unbalance vibrations, which have bad influences on the performance of a rotary machine, on the resonance frequency for the overhung rotor system with actively flexible pedestal. Therefore, in this model, the control system is designed by using the robust control theory. The numerical simulations about the over-hung rotor system containing the control system are performed, and the robust control effect for the vibration of the overhung rotor is examined.