摘要
为了提高空间相机主支撑结构的刚度,减轻结构质量,根据大型离轴三反空间相机的特点,研究了其主支撑结构的形式。应用Rayleigh法推导了桁架式主支撑结构的基频计算公式,分析了桁架杆间夹角对其基频的影响,并以此为基础研究了其优化方法和优化过程。优化设计了某预研空间相机的桁架式主支撑结构并对其结构特性进行了分析。分析结果表明,设计的主支撑机构的质量减轻了22kg,基频可达146Hz,表明本研究对大型离轴三反空间相机主支撑结构的设计具有参考价值。该研究结果已成功应用于某预研相机的样机研制中。
An optical supporting structure is studied to improve its structure stiffness and reduce the structure mass to meet the requirement of space camera. A formula to calculate fundamental frequency is proposed using Rayleigh method, and the influences of the angles between trusses on fundamental frequency are analyzed. Then, the optimization method and process are studied. Based on the analysis above, an optical supporting structure with high stiffness for a pre-research space camera is designed. The analysis results indicate that the mass of designed optical supporting structure has been reduced by 22 kg and its fundamental frequency is 146 Hz, which shows that above analysis has a certain instructional significance for the design of optical supporting structures in high-resolution off-axis threemirror reflective space cameras.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2009年第3期603-608,共6页
Optics and Precision Engineering
基金
国家863高技术研究发展计划资助项目(No.2007AA122113)
关键词
空间相机
桁架式主支撑结构
刚度分析
优化设计
space camera
trussed supporting structure
stiffness analysis
optimization design
