Application of Magnetorheological Fluid Damper in Rotor Vibration Control

A shear mode magnetorheological (MR) fluid damper used for rotor vibration control is designed, and the theoretical model of a cantilever rotor system with the MR fluid damper is established. The imbalance properties of the rotor system is studied theoretically and experimentally. It is found from the study that as the magnetic field strength in the MR fluid damper increases, the damping and stiffness of the damper are increased. The vibration amplitude of the rotor system is decreased at the critical speed, and the critical speed of the rotor system is increased with the increasing of applied magnetic field. The rotor vibration when passing through the critical speed can be controlled by using simple on/off control method.