月基极紫外相机反射镜与探测器间支撑结构  

Supporting structure between reflection mirror and detector in lunar-based extreme ultraviolet camera

作　　者：王智[1] 王忠素[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《仪器仪表学报》2013年第1期57-64,共8页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(61108066)资助项目

摘　　要：为了保证月基极紫外相机在卫星发射、地月变轨及月表着陆过程中的大量级振动冲击、月表超大温差环境以及尽量轻的相机重量条件下,反射镜相对于探测器的位置精度要求,设计并研制了基于CFRP(carbon fiber reinforeed plastic)的反射镜与探测器间的支撑结构,分析并试验验证了支撑结构的稳定性。首先,根据极紫外相机的光学系统,确定了反射镜与探测器间的支撑结构形式;然后,考虑相机重量及反射镜相对探测器的位置精度及稳定性要求,采用CFRP作为支撑结构的结构材料;分析了重力和温度载荷作用下反射镜相对探测器间的角度变化量、反射镜面形;支撑结构的固有频率以及在整机上的正弦振动、随机振动应力响应。试验结果表明:反射镜相对探测器间的角度变化量<20″,验证试验后图像分辨率,满足相机技术指标要求。In order to meet the requirements of the position precision between reflection mirror and detector of extreme ultraviolet （EUV） camera under the conditions of large level vibration and impact in satellite launching, earthmoon orbit transfer and moon landing, extra large temperature difference on lunar surface and light weight of the camera,the supporting structure between reflection mirror and detector was designed based on carbon fiber reinforeed plastic（CFRP） ; and the stability of the supporting structure was analyzed and validated with experiments. Firstly,the form of the supporting structure between reflection mirror and detector is determined according to the optical system of EUV camera. Then, considering the requirements of the camera weight, and the positioning accuracy and stability between reflection mirror and detector of EUV camera, CFRP is adopted as the material for the supporting structure. The reflection mirror surface shape, the angle variation between reflection mirror and detector are analyzed under the weight and temperature loadings. The natural frequency of the supporting structure and the stress responses under sinusoidal and random vibrations in the system are analyzed. Verification experiment results show that the angle variation between reflection mirror and detector is less than 20＂, and after verification experiment the image resolution meets the specification requirements of the camera.

关 键 词：极紫外相机 碳纤维复合材料 支撑结构 

分 类 号：V476.3[航空宇航科学与技术—飞行器设计]