基于辐射散热的空间目标红外特性建模与研究

发布时间：2018-02-05 04:42

  本文关键词： 空间目标 辐射散热 红外特性 建模与仿真　出处：《红外与激光工程》2017年06期 　论文类型：期刊论文

【摘要】：首先介绍了用于保证空间目标正常工作常用的辐射散热器分类,并阐述了其运行模式及使用条件。总结了现有的空间目标红外特性模型,并进一步分析,将空间目标外表面区域分为一般区域和辐射散热区域,建立不同的能量方程。以FY-1C为例,根据空间目标的轨道特性、材料特性和结构特性,使用有限单元法分析得到空间目标外表面的温度场分布,在散热功率为0 W和100 W的情况下,散热区域温差最大为51.49℃。结合温度场分布和轨道特性,进一步计算得到空间目标在距离5 km的探测系统入瞳处的辐射照度。当目标处于地球阴影区,目标散热区域接收到的地球自发辐射和地球反射辐射入射角很大,可以忽略不计,此时目标的辐射照度在两种散热功率下相差1~2个数量级。在日照区,由于目标反射辐射的影响,不同的散热功率只对长波波段的辐射特性有一定影响。
[Abstract]:Firstly, the classification of radiator used to ensure the normal operation of space targets is introduced, and its operation mode and operating conditions are described. The existing infrared characteristic models of space targets are summarized and further analyzed. The outer surface area of space target is divided into general region and radiation region, and different energy equations are established. Taking FY-1C as an example, according to the orbit characteristic, material characteristic and structure characteristic of space target. The temperature field distribution on the outer surface of the space target is obtained by finite element method, and the heat dissipation power is 0 W and 100 W respectively. The maximum temperature difference in the heat dissipation region is 51.49 鈩，

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