空间遥感相机成像单元结构设计  

Structural design for the imaging unit of space optical remote camera

作　　者：刘晓丰[1,2] 程志峰 王徳江[1] Liu Xiaofeng;Cheng Zhifeng;Wang Dejiang(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《红外与激光工程》2019年第11期176-182,共7页Infrared and Laser Engineering

摘　　要：根据某型号空间遥感相机的技术指标要求,对成像单元进行了详细的设计与分析。首先,给出了一种小体积、轻质量、高稳定性成像单元的结构形式;其次,针对遥感相机电子学设备在轨工作的复杂工况,提出了成像单元防护性设计方法,对大功耗元器件设计了主动热控措施;最后用有限元法对成像单元进行了详细分析,分析结果表明,成像单元一阶模态为184 Hz,远大于遥感相机基频106 Hz,具有较好的动态性能;成像单元在自重、±25℃工况条件下,力学及热稳定性较高。对成像单元进行了力学和热光学试验,力学试验结果表明成像单元的一阶频率为185 Hz,与理论分析结果一致性较好,热光学试验结果表明:成像单元对整机热光学性能影响很小,各项指标均满足设计要求。An imaging unit was designed and researched in detail according to the design demands of the space optical remote camera.Firstly,a structure of the imaging unit was proposed,which had smaller size,lighter weight and higher stability.Secondly,in view of the complex working conditions of the optical remote camera electronic device,the protective design method was provided,and an active thermal control method was designed.Finally,the imaging unit was analyzed using FEM.The results show that the imaging unit has a better dynamic performance,as the fundamental frequency of the imaging unit has achieved 184 Hz,which is much higher than the natural frequency 106 Hz of the optical remote camera.The mechanical and thermal stability is higher under the conditions of gravity and±25℃.The mechanical and thermal optical tests are carried out on the imaging unit,and the mechanical test results show that the fundamental frequency of the imaging unit is 185 Hz,which maintains a good consistency with the theoretical analysis result.The thermal optical test results show that the imaging unit has little influence on the thermal optical performance of the whole machine,and all the indicators meet the design requirements.

关 键 词：空间遥感相机 成像单元 有限元方法 稳定性 热光学 

分 类 号：V45[一般工业技术—材料科学与工程]