基于组装式望远镜的子镜模块结构设计

Structure Design of Sub-mirror Module of the On-orbit Assembling Space Telescope

在轨组装空间望远镜是将望远镜进行模块化,模块通过一次或多次发射送入预定轨道,并在轨道上完成整机组装、调试。组装式空间望远镜的主镜由多个子镜模块阵列拼接而成,基于1 m口径空间组装望远镜地面原理演示样机,对望远镜子镜模块进行设计,设计内容包括子镜的镜体支撑、促动器的装配方法等,采用有限元数值模拟分析手段对设计结果进行了仿真验证,然后对子镜模块实物进行了相关测试。结果表明,子镜反射镜的面形精度RMS优于0.02λ,两组子镜的共焦共位相拼接精度为0.0235λ,支撑结构设计合理、效果良好,满足使用需求。

On-orbit Assembly Space Telescope aiming to modularize the telescope,is sent to the designated orbit through one or more launches,and the whole system is assembled and tested on the orbit.the primary mirror of the On-Orbit Assembling Space Telescope is composed of several sub-mirror modules.Based on the principle prototype of one meter diameter assembled telescope,the segment modules of the telescope is designed including the mirror support of the sub-mirror,the assembly method of the actuator,etc.the design results are simulated and verified by FEA,and then the actual test is carried out.the experiment results show that the surface error RMS of the mirror is better than 0.02λ,co-phase detection accuracy after splicing of double sub-mirrors is 0.0235λ,and that the segment structure has good supporting effect and meets the needs.