磁束ピンニング効果を用いた非接触微小擾乱抑制機構のための基礎特性評価

Abstract

Micro vibrations and heat generated by reaction wheels and a refrigerator cause a problem in observing stars or galaxies with high pointing accuracy. Several methods have been proposed for reducing the influence of the vibration. However, these methods are difficult to cut low frequency band off passively. In addition, thermal strain on a primary mirror decreases the pointing accuracy when the heat transmits to a mission part through conventional vibration isolator. A vibration isolator using the flux pinning effect is proposed for solving the problem in this paper. The pinning force can maintain the relative distance and attitude between a type-II superconductor and a magnet without control. The spring and damping characteristics of the pinning force is applied to suppress the vibration effect. A mission part and bus part is not connected mechanically but electromagnetically, therefore it is expected that the influence of the heat transfer can decrease. Results of numerical analysis and experiment are given for discussing the feasibility of the proposed mechanism.