Study on the Safety of a Two-Axis Actuation System for an Electro-Optical Payload

The two-axis actuation system for the geostationary electro-optical payload is applied to succeed the existing mission and enhance observation performance. In this study, structural analysis was conducted to verify the structural safety of the two-axis actuation system under design loads, launch shock environments, and orbital conditions. First, a modal analysis was performed to predict the dynamic response characteristics of the drive system during launch. Additionally, a quasi-static analysis was conducted to evaluate the structural safety of the actuation system, and the integrity of the bolts used in the interface between the actuation system and the satellite body was examined. For the system, structural safety was verified through shock analysis under launch conditions. Finally, a thermal stress analysis was performed to assess the thermal structural safety of the system in an orbital environment.