空间遥感相机结构的计算机辅助工程分析

为满足空间遥感相机苛刻的设计要求,有必要对其初步设计方案的光学及机械性能进行预估。为此,对空间遥感相机在温度场、重力场及随机激励载荷下的光学同心度及光程差的变化进行了研究。通过计算机辅助工程分析的手段,对遥感相机不同的结构方案进行了分析、比较。计算了相机结构在温度场及重力场作用下的位移与变形,进而求出光学同心度及光程差的变化。对随机激励谱下的动力学响应RMS也进行了估算。通过若干设计——分析迭代,选取了最佳方案并实现了结构优化。

Computer-Aided Engineering Analysis of Space Remote-Sensing Camera Structure

In order to meet the tight design requirement of space remotesensing camera it is necessary to investigate the complex variation of the- concentricity and optical path difference in the optical system due to temperature, gravitation and random excitation. Different schemes of the camera structures have been analysed and compared by means of Computer-Aided Engineering Analyses. Displacements and deformations of the camera structure, due to the effects of temperature and gravitation, have been calculated separately and the variation of the concentricity and optical path difference in the optical system is given. The dynamic response RMS under random excitation spectrum is estimated. By several design-analysis iteration the optimum scheme and structure have-been obtained.