星载激光雷达滤波器组件热分析及参数优化

摘要

为了有效提高星载激光雷达后继光学系统中滤波器组件结构热保温性能,保证其核心部件F-P标准具利用材料的热光特性进行中心波长调谐的精度,对滤波器组件进行了初步热结构设计.利用有限元软件Ansys Workbench对滤波器组件初始结构进行稳态热分析,确定加热功率范围,再对热结构中的关键参数进行基于灵敏度分析的多目标优化,并确定各参数的最优值.优化分析结果表明:标准具达到稳态设计工作温度48℃时,加热功率为7.05 W,节省功率消耗11.3%,标准具表面节点最大温差由原来的0.253℃减少为0.05℃,满足设计技术指标要求.%In order to effectively improve thermal insulation performance of filter components in subsequent optical system of spaceborne lidar, and ensure center wavelength tuning accuracy of F-P etalon which is core component by using hot-light characteristic of material, preliminary thermal structure for filter assembly is designed in this paper.Steady-state thermal analysis for initial structure of filter components is conducted by finite element software Ansys Workbench and heating power range is determined.Then key parameters of thermal structure are optimized by multi-objective based on sensitivity analysis and optimal value of each parameter is determined.Results show that maximum heating power is 7.05 W when temperature of F-P etalon reaches at 48℃,which saves power consumption of 11.3%.And maximum temperature difference of F-P etalon surface is reduced from 0.253℃ to 0.05℃, which meets requirements of design specifications.