摘要
空间遥感器光学反射镜的高刚度、支撑结构的合理性以及良好的热尺寸稳定性是保证其成像的关键因素。遥感器的重量对于运载平台也是至关重要的。针对这些问题,提出一种支撑杆的连接方式,能够减轻遥感器的重量。反射镜和背板采用高体份铝基复合材料,不仅保证高度、强度,而且因采用同一种材料从而避免了热环境对遥感器结构变形的影响。通过采用有限元仿真分析,在重力和10°温升情况下各反射镜的面形PV值<55nm,满足<1/10λ(λ=632.8nm)指标要求,整个结构的前三阶模态为115Hz,120Hz,203Hz。结果表明,采用支撑杆以及铝基复合材料的遥感器结构能够满足空间环境要求,为进一步工程应用提供了理论依据。
The key factors guaranteeing the image quality include high rigidity, the support structure rationality and the better hot size stability. The remote sensor weight is also very important for the delivering platform. In view of these questions,support rob connection way is proposed in order to reduce the remote sensor weight. The rigidity and strength lof remote sensor can be gained through the mirror and back board adopting high quantity SiC/Al compound materials. The environment influence to the remote sensor structure deformaiton can be avoided because of adopting the same material. Through the finite element simulation analysis, all mirror figure PV value is smaller than 55 nm in the gravity and 10° temperature rise situations. These results can meet the target requirement which is smaller than 1/10λ（λ=632.8 nm）. The first three step modes of the total structure are 115 Hz, 120 Hz and 203 Hz. The results indicate that the remote sensor structure adopting support rod and Sic/Al compound materials can meet the space environment requirements.
出处
《光机电信息》
2010年第12期109-112,共4页
OME Information
关键词
空间遥感器
高体份铝基复合材料
支撑杆
有限元
space remote sensor
high quantity Sic/Al compound material
support rod
finite element
