响应面模型的大口径空间反射镜优化  

Optimization of large aperture space reflector based on RSM

作　　者：王书新[1] 李景林[1] 张帆[1] 齐光[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《红外与激光工程》2013年第S02期291-297,共7页Infrared and Laser Engineering

基　　金：国家高技术研究发展计划(863-2-5-1-13B)

摘　　要：对于采用多点支撑的大口径空间反射镜,反射镜支撑点位置的最优布局是提高反射镜面形精度的重要方面。在Isight优化平台上,应用响应面近似模型对某2 m空间反射镜进行了支撑点位置优化。首先,利用经典理论公式确定的支撑点位置进行了反射镜结构初步设计;其次,利用Isight软件过程集成和流程自动化功能,建立了包括反射镜有限元模型更新、计算、评价的优化平台;最后,采用响应面近似模型研究了反射镜的支撑点位置优化问题,建立了光轴方向重力工况下反射镜面形精度rms与支撑点位置的关系。结果表明,优化后反射镜面形精度rms值为7.3 nm,比初始rms值23 nm减小了68.3%,优化后结果满足项目指标要求。所提出的优化方法提高了反射镜设计的合理性和效率,为大口径反射镜结构优化提供了一种新的思路。Account for large aperture space reflector with multiple supports, it is an important aspect in improving the accuracy that reflector with optical layout of the locations. Applied Response Surface Methodology （RSM）, the supports locations of a 2 m space reflector was optimized on Isight platform. Firstly, the structure of reflector achieved to the initial design according to the classical theory formula about the supports locations of plate mirror. Secondly, Isight, a computer aided optimization （CAO） software with the properties of process integration and process automation capabilities, was introduced to realize finite element model updating, calculation, optimization of the evaluation platform. Finally, RSM was applied to probe the optimum of supports locations of reflector, and make clearly the relationship between surface error and supports locations on the optical axis gravity conditions. The analysis indicates that the rms value of optimized mirror is 7.3 nm, decreases 68.3% of the initial design, and fulfills the design specification. The proposed optimization method improving the rationality and efficiency in the design provides a new approach.

关 键 词：响应面模型 空间反射镜 支撑点位置 

分 类 号：TH762[机械工程—仪器科学与技术]