数値解析と実験による非接触微小擾乱抑制機構の振動特性評価

Abstract

Space observations have been performed to acquire data related to configuration of galaxies and planets so far. Currently, space agencies and companies are looking at high pointing accuracy observation of targets in deep space. To achieve the purpose, internal disturbance suppression technologies are very important. Those internal disturbances are mainly generated by equipment on bus part of space telescopes and propagates through the structure. Among the internal disturbances, vibration and heat cause predominantly to degrade pointing accuracy of deep space observation. To suppress the vibration and heat, a contactless micro vibration isolator using the flux pinning effect has been proposed. Our proposed isolator utilizes spring-damping characteristics of the flux pinning effect to suppress vibration. Although the spring-damping characteristics is nonlinear, it is expected that the nonlinearity can be linearized for micro vibration suppression. To confirm the linearized vibration characteristics of the proposed micro vibration isolator, a vibration experiment is conducted. The experimental results are compared with numerical model. Performance of vibration suppression using linearized spring-damping characteristics is discussed in this paper.