B24 局所フィードバックによる磁気浮上系の剛性制御(OS2 磁気浮上・磁気軸受の制御1)

概要

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A control method of adjusting the stiffness of suspension was proposed for magnetic suspension systems whose bias flux is provided by permanent magnets. In such magnetic suspension systems, zero-power control has often been applied. Since the zero-power magnetic suspension system behaves as if it has negative stiffness. So that it is applied to vibration isolation system. However, the amplitude of negative stiffness cannot be adjusted. In this paper, a proportional feedback is incorporated into the minor current feedback loop of the zero-power controller. It is shown that the stiffness can be adjusted by the gain of the added current feedback. This system improves static load performance for magnetic suspension system. The principle and experiment results are presented. When a gap changes in this system, the stiffness also changes. Therefore a nonlinear compensation is included in this system to improve the linearity.
一般社団法人日本機械学会の論文
2009-09-01