Abstract
This paper deals with a magnetically suspended flywheel and the stability analysis of the gyroscopic motion.The magnetic bearing is composed of eight electromagnets whose attractive forces have components both in axial and in radial direction so that it may be useful in reducing the size and the weight.
The high-speed test and the stability analysis are performed the results of which indicate that (1) the phase lag of the control electronics and the actuators may cause an unstable nutation at a high speed, (2) the integral compensation may cause an unstable precession at a high speed, (3) a gimbal rate crossfeedback stabilizes the notation, (4) a gimbal angle cross-feedback stabilizes the precession.
These results make the magnetic wheel system stable over the speed of 10, 000rpm.
