Modal H_∞ control of flexible rotor supported by magnetic bearings

摘要

Robust H_∞ control of a flexible rotor supported by magnetic bearing is described. It is aimed at stabilization of a flexible rotor which runs over the bending critical speed. Both ends of the rotor are supported by magnetic bearings which are controlled by a local PD controller. The stiffness of the bearings needs to be high so that the vibration in the bending modes becomes less damped with increasing feedback gains.