红外导引头探测能力的数学建模

分析了影响红外导引头探测能力的关键因素 ,采用噪声等效通量密度来表征导引头系统的探测能力 ,研究了系统的信噪比 :目标的红外辐射包括目标自身的热辐射 ,以及目标反射地球、太阳和天空的辐射。作用在探测器上的总的噪声等效通量密度为大气背景的噪声等效通量密度和系统自身的噪声等效通量密度的均方根和 ,推导出了红外导引头探测能力的数学模型 ,并对大气光学效应和气动光学效应的影响进行了初步讨论。

Mathematical modeling on detective ability of IR seeker

The key factors that affect the detective ability of infrared seeker are analyzed. Noise Equivalent Flux Density (NEFD) is taken to mark the detective ability of IR seeker. Research on the target signal & noise is carried: target's all infrared radiance including its' radiance and reflection to the radiance of the earth, the sun and the sky background. Mathematical model is concluded which describes the detective ability of IR seeker. Fundamental discussion about the affection of atmospheric optics and pneumatic optics is presented.