摘要
以国外某型号隐身飞机为分析对象,通过建立飞机不同部位的红外光谱辐射模型、双向反射率(BRDF)模型和大气吸收/散射模型,计算得到在北半球中纬度夏季几种典型太阳入射角度、观测角度和飞行状态下,飞机的空间辐射能量分布.在此基础上建立低空探测模型和探测场景,并分析国外装备的某机载红外搜索跟踪系统(IRST)对该隐身飞机的探测能力.研究结果表明,加力状态、大气条件、太阳入射角、蒙皮反射率、探测谱段和探测角度都会影响飞机的红外辐射特性和可探测性.在低空探测模式下,阳光反射的影响相对有限,辐射强度主要受加力状态和探测波段的影响,在空间分布上呈现显著的多样性和差异性.
Taking a certain type of foreign stealth aircraft as the analysis object,and by establishing infrared spectral radiation models,Bidirectional Reflectance Distribution Function(BRDF)model and atmospheric absorption/scattering models for different parts of the aircraft,the paper calculates and obtains the spatial radiation energy distribution of the aircraft under several typical solar incidence angles,observation angles and flight attitude in mid-latitude summer of the northern hemisphere.On this basis,the low altitude detection model and detection scenario are established,and the detection capability of a foreign equipped airborne infrared search and tracking system(IRST)to the stealth aircraft is analyzed.The research results are shown as follows:Afterburning state,atmospheric conditions,solar incidence angles,skin reflectance,detection band and observation angles all affect the infrared radiation characteristics and detectability of the aircraft.In the low-altitude detection mode,the effect of solar reflection is relatively limited,and the radiation intensity is mainly affected by the afterburning state and detection band,showing significant diversity and difference in spatial distribution.
作者
田浩
王旌尧
王久龙
邢妍
TIAN Hao;WANG Jingyao;WANG Jiulong;XING Yan(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)
出处
《空天预警研究学报》
CSCD
2024年第3期167-172,共6页
JOURNAL OF AIR & SPACE EARLY WARNING RESEARCH
基金
国家自然青年科学基金项目(62105326)。
