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无人机(Unmanned Aerial Vehicle,UAV)蒙皮的红外辐射特性是对UAV进行探测识别的重要依据,而UAV蒙皮的气动力加热、太阳辐射换热、地球辐射换热等是影响UAV蒙皮辐射特性的主要因素。在综合考虑了环境以及UAV自身辐射的情况下,建立了UAV蒙皮红外辐射的计算模型,采用向前差分法求出了UAV蒙皮的一维导热微分方程,并在此基础上,结合UAV蒙皮材料的发射率,计算了在某一平面上UAV红外辐射强度的分布情况。计算结果表明:蒙皮在8~14μm波段处红外辐射强度远大于3~5μm波段的红外辐射强度;相同波段处,蒙皮正上方的辐射强度大于正下方的辐射强度。
Unmanned Aerial Vehicle (UAV) skin infrared radiation characteristics of UAV detection and identification is an important basis, and UAV skin aerodynamic heating, solar radiation heat transfer, the Earth’s radiative heat transfer is the impact of UAV skin Radiation characteristics of the main factors. Considering the environment and the radiation of UAV itself, the calculation model of UAV skin infrared radiation is established. The one-dimensional differential thermal equation of UAV skin is obtained by forward difference method. Based on this, The emissivity of the skin material was used to calculate the distribution of the infrared radiation intensity of the UAV in a certain plane. The calculated results show that the infrared radiation intensity of the skin in the band of 8 ~ 14μm is far greater than that of the infrared radiation in the band of 3 ~ 5μm. The radiation intensity just above the skin is greater than the radiation intensity directly below the skin in the same wavelength range.