摘要
针对具有多姿态变化特点的空间相机,提出了考虑太阳辐射的到达外热流和吸收外热流两种情况下的极端工况确定方法和计算流程。根据辐射学的基本理论,并结合相机的结构特点,推导出了相机外表面总太阳辐射流的计算公式;根据相机进出地影的情况和太阳常数分别建立了相应矩阵,并进行了有关矩阵的运算和变换;借助工具软件Matlab求解得到了投落到相机外表面的总太阳辐射外热流极值,并在此基础上确定出该相机的极端工况;将此工况输入到I-DEAS/TMG仿真环境中进行仿真分析,验证了此方法的正确性。该计算方法同样适用于其它类型的相机,具用通用价值。
Extreme working conditions of thermal design for a attitude-varied space camera are determined by means of the calculation of incident heat flux or absorbed heat flux. According to the theory of radiometry and characteristic of the camera, formulas about solar-heat-flux on the camera surface are derived, relevant matrix are created and operated based on the solar flux and the position relation between the camera and the earth shadow, the extreme value of total amount of solar-heat-flux is solved by Matlab software, so the extreme working conditions are determined and the performance of the thermal design are simulated bv the I-DEAS/TMG software. The results show that the method of determination about the extreme working conditions is correct, It also can be applied to the other space camera.
出处
《光学技术》
CAS
CSCD
北大核心
2009年第6期843-846,850,共5页
Optical Technique
关键词
空间相机
太阳辐射外热流
热设计
极端工况
space camera
solar heat flux
thermal design
extreme working conditions
