论文部分内容阅读
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。
In order to meet the harsh design requirements of space-borne remote-sensing cameras, it is necessary to estimate the optical and mechanical properties of the initial design scheme. For this reason, the changes of optical concentricity and optical path difference of space remote sensing camera under temperature field, gravitational field and random excitation load are studied. Through the means of computer aided engineering analysis, different structures of remote sensing cameras were analyzed and compared. The displacement and deformation of the camera structure under the action of temperature field and gravitational field are calculated, and the changes of optical concentricity and optical path difference are obtained. The dynamic response RMS of the random excitation spectrum was also estimated. Through several design-analysis iterations, the best solution was selected and structural optimization was achieved.