CAJ | 학술논문

随着近几年离轴三反(Three-Mirror Anastigmat, TMA)相机在大视场高分辨率成像领域的应用，大长细比反射镜的支撑技术成为离轴 TMA 相机研制的关键技术之一。文章研究的反射镜尺寸达到986mm×246mm，为了使大长细比反射镜的支撑结构同时满足高刚度和高面形稳定的要求，采用理论研究和有限元分析相结合的方法设计了一种侧面柔性支撑结构。分析结果表明，反射镜组件一阶频率达到114.9Hz，在重力和2℃温变耦合下综合面形变化均方根值只有4.9nm，工艺件的力学振动试验结果和仿真分析基本吻合，反射镜支撑结构设计合理，满足空间应用要求。
수착근궤년리축삼반(Three-Mirror Anastigmat, TMA)상궤재대시장고분변솔성상영역적응용，대장세비반사경적지탱기술성위리축 TMA 상궤연제적관건기술지일。문장연구적반사경척촌체도986mm×246mm，위료사대장세비반사경적지탱결구동시만족고강도화고면형은정적요구，채용이론연구화유한원분석상결합적방법설계료일충측면유성지탱결구。분석결과표명，반사경조건일계빈솔체도114.9Hz，재중력화2℃온변우합하종합면형변화균방근치지유4.9nm，공예건적역학진동시험결과화방진분석기본문합，반사경지탱결구설계합리，만족공간응용요구。
With the application of wide field of view and lightweight TMA camera in high resolution imag-ing area, design of support structures for large aperture rectangular mirrors with large aspect ratio becomes a critical technique for space cameras in recent years. In this paper, mirror size reaches 986mm×246mm,in order to meet the requirement of high rigidity and high surface figure stability for large aspect ratio mirror, A flexible sup-port structure is designed with a method of combining theoretical research and finite element analysis. The results demonstrate that the first order frequency of the mirror component is 114.9Hz. The surface figure error(RMS value) is only 4.9nm under the condition of ground gravity and 2℃ temperature change. The mechanical test re-sults of the simulated part are consistent with the theoretical analysis. Analysis results demonstrate that design of the mirror support structure is effective, which can meet the requirement of space application.