Primary Structural Design and Mechanical Analysis of Space Camera

A primary structural design concept of space three-mirror off-axis camera was presented.The primary structure of camera was a cast TiB2/Al frame.The finite element model of camera was built and the modal analysis,static analysis,dynamic analysis and STOP(structural-thermal-optical performance) analysis was performed.Based on the analysis results the structural design concept of camera was improved,finally the camera had a 85 Hz first natural frequency and the surface figure of reflective mirrors suffered from ±10 ℃ temperature change 1 g gravity release still met the requirements of optical subsystem design.The conclusion is that the primary structural design concept of space camera is applicable.The first natural frequency of camera is high enough to resist the structures deformation induced by gravity release on orbit and the dynamic disturbances during launch.The thermal-elastic deformation of camera structures undergoing on-orbit temperature variations meets the system requirements.The bipod-type flexure mechanical interface between camera and satellite platform can relax the distortion of camera structures due to the deformation of satellite platform structures.