|
Zhang Kai
Zhao Lei
Zhao Hongbin
Department of Physical Engineering,
Tsinghua University,
Beijing 100084, China |
|
|
RESEARCH ON CONTROL OF
FLYWHEEL SUSPENDED BY ACTIVE
MAGNETIC BEARING SYSTEM
WITH SIGNIFICANT GYROSCOPIC
EFFECTS
Abstract:
Traditional PID controllers are no longer suitable for magnetic-bearing-supported high-speed flywheels with significant gyroscopic effects. Because gyroscopic effects greatly influence the stability of the flywheel rotor, especially at high rotational speeds. Velocity cross feedback and displacement cross feedback are used to overcome harmful effects of nutation and precession modes, and stabilize the rotor at high rotational speeds. Theoretical analysis is given to show their effects. A control platform based on RTLinux and a PC is built to control the active magnetic bearing (AMB) system, and relevant results are reported. Using velocity cross feedback and displacement cross feedback in a closed loop control system, the flywheel successfully runs at over 20 000 r/min.
Key words: Active magnetic bearings Flywheel Displacement cross feedback Velocity cross feedback Gyroscopic effects
|