空间带翼微动目标红外特性仿真研究  

Simulation study of infrared characteristics for fin-stabilized space objects with micro-motions

作　　者：厉夫兵[1] 许小剑[2] 

机构地区：[1]北京信息科技大学信息与通信工程学院,北京100101 [2]北京航空航天大学电子信息工程学院,北京100191

出　　处：《北京信息科技大学学报（自然科学版）》2016年第5期41-45,共5页Journal of Beijing Information Science and Technology University

基　　金：北京市自然科学基金资助项目(3164043)

摘　　要：建立了一种带翼的空间微动目标红外辐射特性计算模型。对目标进行三维剖分获得微元体,计算外热源(太阳、地球等)对目标表面的辐射加热、目标表面向外部空间的辐射散热、目标微元体之间的三维导热,以及目标的辐射换热,建立传热方程并获取微元体的非稳态温度。在此基础上,计算带翼目标在传感器方向投射的红外辐射能量,并与普通空间目标的红外辐射特性进行对比。结果表明,目标在自旋过程中,翼状结构使目标在传感器方向的投影面积发生快速变化,导致目标的红外辐射强度在1个锥旋周期内产生多次尖峰起伏。An infrared signature simulation model for fin-stabilized space objects with micromotions is developed in this paper. A space object is modeled and decomposed into micro-elements in preparation for 3-D conduction heat transfer. Equations for surface heating of the object from the Sun and the Earth are derived. Heat dissipation into the space as well as thermal exchange in the object chamber is calculated. Formulation of heat transfer is established and unsteady temperature of the object is calculated for each element. Then,infrared characteristics projected into the space-based sensor are obtained and compared with that of the space object without fins. Result indicates that compared with the object without fins,the infrared radiant intensity of the object with fins undergoes several fluctuations within one coning period,due to the fast variation of the projected area of the spinning object with fins.

关 键 词：空间目标 非稳态 温度 红外 

分 类 号：TN219[电子电信—物理电子学] TK124[动力工程及工程热物理—工程热物理]