机电工程技术2025，Vol.54Issue(11)：51-56,6.DOI:10.3969/j.issn.1009-9492.2025.11.010
基于Bipod的超低温空间反射镜支撑结构设计
Bipod-based Support Structure Design for Ultra-low Temperature Space Mirrors
摘要
Abstract
Aiming at the face shape accuracy requirement of space mirrors in ultra-low temperature(77 K)environment,a mirror structure design scheme is proposed based on three-point lateral Bipod support.By comparing and analysing the mechanical properties of the square and circular flexible support structures,combined with optimization and parametric modelling,the suppression mechanism of the root mean square error(RMS)of the face shape under the combined effect of gravity and temperature loads is investigated.Using microcrystalline glass(Zerodur)as the reflector material and Yin steel(4J36)as the support structure material,finite element simulation is used to verify the advantages of the circular double-layer flexible links in terms of low-temperature shrinkage uniformity and dynamic stiffness.The results show that,under the gravity and temperature drop coupling condition,the facet RMS of the circular flexible support is reduced by about 36%(in the vertical direction of the optical axis)and 35%(in the horizontal direction of the optical axis)compared with that of the square structure,and the first-order modal frequency reaches more than 200 Hz,which meets the static-dynamic performance requirements of high-precision optical systems,providing a theoretical basis and engineering reference for the flexible support design of ultra-low temperature space mirrors.关键词
超低温/空间反射镜/柔性支撑/优化设计/有限元仿真Key words
ultra-low temperature/space mirror/flexible support/optimized design/finite element simulation分类
机械制造引用本文复制引用
赵桐,胡源,李小冬,侯东易,冯钧..基于Bipod的超低温空间反射镜支撑结构设计[J].机电工程技术,2025,54(11):51-56,6.基金项目
某科技委领域基金(2023-XX-JJ-0467) （2023-XX-JJ-0467）
