アウタロータ形磁気軸受における振動と制御 : 第1報, 剛体モードの振動制御

概要

論文の詳細を見る
The magnetic bearings described here has been developed for high-speed rotating machinery. The manufactured experimental model is composed of two radially-active type-magnetic bearings which utilize permanent magnets. The model adopts the virtually zero power (VZP) method. Experiments and stability analysis of the model show that the VZP may cause an unstable precession mode. There are two kinds of conical or gyroscopic motion, i.e., precession and nutation. Based on angular momentum, a method to control conical motion of the rigid rotor is proposed and analyzed. We cannot actually observe the angular momentum vector or rate signal of coning motion. Instead of the rate signals, we adopted the inter-axis cross-coupling feedback of position signals of conical motion. Stability analysis of the model with a modified control method proved the effectiveness for damping conical motion. In experiments of the model, precession at about 10,000 rpm was cleared, and rotation speeds higher than about 30,000 rpm were attained.
社団法人日本機械学会の論文
1989-01-25