Abstract: For a magnetic-bearing-supported high-speed flyw- heel with significant gyroscopic effects, its nutation and precession modes greatly influence stability of a system at high rotational speeds. To make a rotor running at a high rotational speed, its nutation and precession modes should be restrained effectively. But for such a rotor, traditional PID controllers are not suitable any more. A method called magnetic force lead control is created to restrain the nutation mode of a flywheel rotor. And a displacement cross feedback with a low-pass filter is added to restrain the precession mode. Analysis results, simulation results and some experimental results about the method are provided. They all show the effects of the method.

Key words: AMB, Flywheel, Magnetic force lead