ジャイロ効果を考慮したゼロバイアス磁気軸受系のバックステッピング制御 : 剛性モデルと弾性モデルに対する考察(機械力学,計測,自動制御)

概要

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This paper deals with a large flywheel magnetic bearing system. A simple rigid model was derived based on overlapping principle. A servo system backstepping controller taking into consideration of the gyroscopic effect was designed. The switching method for the control current was chosen to avoid the use of bias current. Through simulation and experiments, the effectiveness of rigid model and stability of the controller was verified. Meanwhile, the power consumption using the proposed controller is reduced by half compared to bias current control. Faced with the problem that the rotor cannot overcome a high critical rotational speed, a flexible model based on finite-element method was derived and used in place of the rigid model, applying the same controller. From the result of root locus analysis of closed-loop system, a conclusion can be drawn that it is important to the magnetic bearing system to design a controller considering the gyroscopic effect based on a flexible model which includes two rigid modes and a first flexible back mode.
2005-12-25