烟雾干扰光学制导武器中Mie散射系数快速算法

A High Accuracy Mie Scattering Coefficient Algorithm for Interfacing Smog Optic-guided Weapon

烟雾干扰光学制导武器中烟雾中的颗粒物的浓度、平均粒径的精确测量是评价武器隐蔽效果的关键指标。Mie散射中的消光系数计算是烟雾中颗粒物的平均粒径和浓度测量中的关键步骤。在传统Mie散射计算的基础上提出一种适用不同颗粒大小和复折射率的Mie散射系数算法。推导了散射系数计算公式,分析了不同折射率和粒径的递推公式。计算表明,该方法的计算精度高、范围广、时间短,适用于干扰烟雾中生成颗粒物的平均粒径和浓度在线测量。

Average particle size and concentration of smog particulates are the key indexes for theevaluation the smog jamming technology of the weapons in the optic-guided weapon.The calculation ofextinction coefficient of Mie scattering is the key process to measure the average particle size andconcentration of particulate.Thus,based on former calculations of Mie scattering,this paper proposes anew Mie scattering coefficient method which can be suitable for different particle sizes and complexrefractive index.The formula of scattering coefficient is deduced and the recurrent formulas of differentrefractive index and particle size are analyzed.The calculation simulation indicates that Mie scatteringcoefficient process in this paper has higher accuracy,wider calculation range and shorter calculationtime,which is applicable to the online accurate measurement of average diameter and concentration ofthe interfacing smog.