论文部分内容阅读
采用随机表面的计算机生成方法模拟了卫星表面起伏形貌;考虑了空间环境的辐射热流,采用蒙特卡罗法计算起伏表面面元间的辐射传递系数,完成了起伏表面的温度分布计算;考虑表面双向反射分布函数,建立了起伏表面随方向变化的红外辐射强度计算模型,并且以卫星常用的镀铝聚酰亚胺薄膜材料为例,分析了空间目标起伏表面的红外辐射特性。计算结果表明:随机起伏表面的红外辐射特性与理想平面的红外辐射特性差别明显;表面温度分布和红外辐射分布与表面的起伏形貌特征相关性很强。其结果可以为空间目标红外探测技术的研究提供更加有效的支撑。
The surface topography of the satellite was modeled by a computer generated method of random surface. The radiative heat flux of the space environment was considered, and the radiation transfer coefficient between the surface elements was calculated by Monte-Carlo method. The temperature distribution of the undulating surface was calculated. The birefringence distribution function was used to establish the infrared radiation intensity calculation model of the undulating surface with the direction change. The infrared radiation characteristics of the undulating surface of the space target were analyzed by taking the aluminized polyimide film material commonly used in satellite as an example. The calculated results show that there is a significant difference between the infrared radiation characteristics of the random undulating surface and the infrared radiation characteristics of the ideal plane. The distribution of the surface temperature and the distribution of the infrared radiation have a strong correlation with the surface topographic features. The result can provide more effective support for the research of space target infrared detection technology.