空间光谱仪光栅柔性支撑设计与分析

针对目前空间遥感器主支撑结构设计中难以同时保证光学元件刚度大、尺寸热稳定性好的问题，提出了一种具有柔性环节的支撑结构，有效地解决了影响基于空间环境的一种光栅光谱仪成像质量的力、热两个关键环境约束之间的矛盾。根据光学设计指标要求确定了光栅基板的结构形式，通过理论计算对柔性支撑的尺寸参数进行了灵敏性分析，得到了各尺寸对转角刚度的影响权重。通过优化柔性支撑件尺寸参数使光栅组件性能达到最优，利用有限元分析（FEA）软件对光栅组件在力、热耦合作用下的面形精度和动态刚度进行了仿真分析。结果表明，光栅及其支撑结构设计合理，满足空间应用要求，为柔性支撑的深入研究和应用提供了参考。

Design and analysis of flexible support of the grating in space spectrometer

In order to obtain high-stiffness and good thermal stability of main supporting structure in space remote sensor, a flexible support structure was proposed to solve the contradiction of force and thermal constraints availably, which are two key environmental constraints on the imaging of the grating spectrometer. Firstly, according to the optical design requirements, the structure of the grating blank was determined. Secondly, the sensitivity of the sizes of the flexible support was analyzed by theoretical calculation,and their effects on bend rigidity were obtained. Optimum design was utilized to determine the final sizes. Finally, the surface figure precision and dynamic stiffness of the grating component in the thermal-structural coupling state were analyzed with finite element analysis(FEA) software. Simulation results demonstrate that design of the grating blank and its flexible support structure is reasonable, which can meet the requirements of the space application and supply the reference for further study and application.