微纳卫星相机主承力构件轻量化设计与增材制造

针对20kg微纳遥感卫星相机主承力构件的轻量化需求，以转接环、次镜环和主背板三个主承力构件为研究对象，开展面向选区激光熔化增材制造技术的结构设计与制造关键技术研究。结果表明，设计的0.5mm折边结构具有良好的抗压缩和扭转等力学性能，在实现轻量化的同时，可显著提升构件的支撑强度。通过45°斜壁与微桁架结构，实现无辅助支撑增材制造。从能量输入、结构微调及加快热传导三个方面入手，有效解决了打印过程尖角变形难题。最终获得了质量分别为89g、87g和546g的三个轻量化主承力构件。搭载原理样机开展系统装调与地面力学试验，通过了8G重力加速度测试，实现了卫星相机大型复杂结构主承力构件的高承载和轻量化制造。

Optimization Design and Additive Manufacturing of Support Structure for Micro-nano Satellite Camera

Aiming at the lightweight requirements of the main load-bearing components of the 20kg micro-nano remote sensing satellite camera, and taking the three main load-bearing components of the camera adapter ring, the secondary mirror ring and the main backplane as the research background, the structural design and key manufacturing technology research of selective laser melting additive manufacturing technology is carried out in this paper. The results show that the designed 0.5mm hemming structure has good mechanical properties such as compression resistance and torsion resistance, and can significantly improve the support strength of the component while achieving light weight. Through the 45° inclined wall and micro-truss structure, additive manufacturing without auxiliary support is realized. Starting from three aspects: energy input, structure fine-tuning and accelerated heat conduction, it effectively solves the problem of sharp corner deformation during the printing process. Finally, three lightweight main load-bearing members with masses of 89g, 87g and 546g are obtained. Carrying the principle prototype to carry out system assembly and ground mechanics test, it passes the 8G gravitational acceleration test, realizing the high bearing capacity and light weight of the main bearing components of the large and complex structure of the satellite camera.