Numerical Study on a Semi-Active Isolator to Enhance Pointing Performance of Optical Equipment On-Board Satellites

Abstract

The concept of applying semi-active control systems to vibration isolation and shock attenuation is proposed. In this paper, a semi-active isolator for enhancing the pointing performance of optical equipment on-board satellites and its characteristics are first introduced and then a generally applicable semi-active control law is proposed for vibration isolation. The isolation performance of the semi-active control law proposed in this study is evaluated through numerical simulations. The performance of the system with the semi-active control law proposed in this study is compared with those of a passive system and a semi-active system with a previously proposed semiactive control law. Next, to investigate whether or not the isolator is also effective for attenuating shock that is induced by rocket lift-off and pyrodevice ignition for inter-stage separation, we also performed numerical simulations and evaluated its effectiveness.