미소진동 대응 Stewart Platform 기반 Hexapod형 진동절연장치의 배치에 따른 전달률 특성 연구

Abstract

A microvibration source such as a reaction wheel or control moment gyro, which adversely affects the high pointing stability required for modern satellites, generates a six-degrees-of-freedom (6-DOF) disturbance force. Therefore, the vibration isolator must also be capable of isolating 6-DOF vibration. A hexapod isolator is designed to isolate 6-DOF vibration by extending the single-axis isolator. The Stewart platform is widely used for 6-DOF vibration isolation and manipulation. The cubic configuration, which is one of the representative configurations of the Stewart platform, has several advantages in terms of manipulation; however, there is a cross-coupling issue in terms of vibration isolation. In this study, for the generalized configuration of the Stewart platform, force transmissibility change due to the varying angle of the strut and strut inclination angle is analyzed to suggest the optimal configuration based on the Stewart platform to reduce cross-coupling for a 6-DOF microvibration isolator.