航天器环境工程2011，Vol.28Issue(1)：46-51,6.DOI:10.3969/j.issn.1673-1379.2011.01.009
卫星红外遥感器辐射定标光机系统热-结构耦合变形分析
Thermal-structure coupled deformation in an optical-mechanical system for radiometric calibration of satellite IR remote sensor
肖庆生 1杨林华 2赵寿根3
作者信息
- 1. 中国空间技术研究院,北京,100094
- 2. 北京卫星环境工程研究所,北京,100094
- 3. 北京航空航天大学,航空科学与工程学院,北京,100191
- 折叠
摘要
Abstract
The thermal deformation of a radiometric calibration optical-structure system under simulated space environments would cause a great damage to the imaging quality of the system, and reduce the precision of the calibration test eventually.In this paper, a finite element model of such a system is built.Based on the model, with the temperature values at nodes obtained in the radiometric calibration test for the satellite multi-spectral scanner, the distribution of the thermal-structure coupling deformation is calculated and analyzed.The results show that the thermal distortion of the optical bracket would cause rigid displacements of the primary mirror and the primary reflector,making them off the axis or acclivitous and the black body off the focus, and changing the focal distance of the system in a non-uniform steady-state Iow temperature condition.But the root-mean-square (RMS) values of deformation of the anamorphic mirrors are both less than one fortieth of the wave length, within the actual surface shape accuracy requirements of the optical system.关键词
辐射定标/低温/热-结构耦合/有限元分析Key words
radiometric calibration/ Iow temperature/ thermal-structure coupling/ finite element analysis/ mirror distortion分类
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肖庆生,杨林华,赵寿根..卫星红外遥感器辐射定标光机系统热-结构耦合变形分析[J].航天器环境工程,2011,28(1):46-51,6.
