Based on specified three-dimensional scene, an infrared signature simulation model for space objects was developed. Firstly, an object was geometrically modeled and decomposed into micro-elements in three-dimensions. Formulation for surface heating of the object with micro-motion dynamics from the sun and earth was derived. Energy dissipated into space from outer surface as well as the thermal exchange between facets of inner surface was calculated. In this way, three-dimensional thermal conduction of a ballistic object constructed with multi-layer materials was calculated, and the micro-element temperatures were obtained using Gauss-Seidel iteration. Then, radiant components including self-emitted radiation and surface-reflected radiation from the sun and earth in mid-long wave infrared band and long wave infrared band were calculated. It is seen that, because of the sun heating, temperature difference along the circumference is obvious when the object moves without spinning motion in space. Such difference becomes trivial when it undergoes spinning motion.
����,���ջ�,�ƻ���,��.���ڳ���ģ�͵��Ⱥ���ң�г���ģ�ⷽ��[J].��������ײ�ѧ��,2007,26(1):15-21 Yang Guijun, Liu Qinhuo, Huang Huaguo, et al. Methods for simulating infrared remote sensing images based on scene models[J].J Infrared Millim Waves, 2007,26(1):15-21(in Chinese)
�,������,��ǿ.̫������Դ������ⵯ��ʽĿ������¶ȵ�Ӱ��[J].���⼼��,2005,27(1):12-15 Yang Hua, Xuan Yimin, Li Qiang. Effect of sun radiation on surface temperature of ballistic target above aerosphere[J]. Infrared Technology, 2005,27(1):12-15(in Chinese)
�ſ�,�,����˳,��.���������жε�ͷ�����¶ȳ��ֲ����۷���[J].�����뼤���,2005,34(5):583-586 Zhang Jun, Yang Hua, Ling Yongshun, et al. Theoretical analysis of temperature field on the surface of ballistic missile warhead in midcourse[J].Infrared and Laser Engineering, 2005,34(5):583-586(in Chinese)
Ҧ����,����Ƽ,��ǿ.���������ж�Ŀ������¶������ͻ���о�[J].������ӶԿ�,2005,21(2):5-16 Yao Lianxing, Hou Qiuping, Luo Jiqiang. Research of surface temperature and infrared defence of ballistic missile warhead in midcourse[J].Aerospace Electronic Warfare, 2005,21(2):5-16(in Chinese)
Holman J P. Heat transfer[M]. 9th ed. Beijing: China Machine Press, 2005:1-5,77-80,93-95
������D R,����D G.���ȵ�����ַ��̼���[M].�ŷ�»,��.����:ұ��ҵ������,1982:62-68,86-100 Croft D R, Lilley D G. Heat transfer calculations using finite difference equations[M].Translated by Zhang Fenglu. Beijing: Metallurgy Industry Press, 1982:62-68,86-100(in Chinese)
Chen V C, Li F, Ho S S, et al. Micro-doppler effect in radar: phenomenon, model, and simulation study[J].IEEE Transactions on Aerospace and Electronic System.2006,42(1):2-21