中国光学
中國光學
중국광학
CHINESE JOURNAL OF OPTICS
2012年
3期
222-228
,共7页
空间相机%主镜%轻量化%参数优化%拉丁超立方法%多目标遗传算法
空間相機%主鏡%輕量化%參數優化%拉丁超立方法%多目標遺傳算法
공간상궤%주경%경양화%삼수우화%랍정초립방법%다목표유전산법
space camera%primary mirror%lightweight%parameter optimization%latin hypercube method%NSGA II
针对空间遥感器中大口径主镜的轻量化结构设计引入了基于Kriging近似模型的多目标遗传优化方法,以2 m口径SiC主镜为例对其轻量化结构参数进行了优化设计。采用拉丁超立方法对优化参数进行试验设计,建立了Kriging模型,并用多目标遗传算法迭代求得了最优解。优化后得到了质量为243 kg的2 m口径SiC主镜,其面形精度达到了25.7 nm PV,4.7 nm RMS,轻量化率为84%。试验结果验证了此优化设计方法的可行性,为大口径主镜的轻量化结构参数优化设计提供了借鉴和参考。
針對空間遙感器中大口徑主鏡的輕量化結構設計引入瞭基于Kriging近似模型的多目標遺傳優化方法,以2 m口徑SiC主鏡為例對其輕量化結構參數進行瞭優化設計。採用拉丁超立方法對優化參數進行試驗設計,建立瞭Kriging模型,併用多目標遺傳算法迭代求得瞭最優解。優化後得到瞭質量為243 kg的2 m口徑SiC主鏡,其麵形精度達到瞭25.7 nm PV,4.7 nm RMS,輕量化率為84%。試驗結果驗證瞭此優化設計方法的可行性,為大口徑主鏡的輕量化結構參數優化設計提供瞭藉鑒和參攷。
침대공간요감기중대구경주경적경양화결구설계인입료기우Kriging근사모형적다목표유전우화방법,이2 m구경SiC주경위례대기경양화결구삼수진행료우화설계。채용랍정초립방법대우화삼수진행시험설계,건립료Kriging모형,병용다목표유전산법질대구득료최우해。우화후득도료질량위243 kg적2 m구경SiC주경,기면형정도체도료25.7 nm PV,4.7 nm RMS,경양화솔위84%。시험결과험증료차우화설계방법적가행성,위대구경주경적경양화결구삼수우화설계제공료차감화삼고。
As for the lightweight structure of a large-aperture primary mirror in remote sensors,this paper introduces an optimized multi-target Genetic Algorithm(GA) based on the Kriging approximate model to design all lightweight structure paramaters for a 2 m-aperture SiC primary mirror.The latin hypercube method is used to build the Kriging model and do the experimental design of optimized parameters,and then a optimal solution is obtained through the multi-target GA(NSGA II).After the optimization,the 2 m-aperture SiC primary mirror weights 243 kg,the surface accuracy reaches 25.7 nm PV,4.7 nm RMS and the total lightweight rate is 84%.The experimental result proves the feasibility of this optimization method and it can be a reference for the future lightweight optimization design of the structural parameters of large-aperture primiary mirrors.