激光光幕的弹丸反射能量建模与仿真

Modeling and Simulation of Projectile Reflected Energy of Laser Screen

针对传统光幕靶探测性能低下容易造成目标丢失的问题,文中基于激光光幕靶探测机理建立一种含有时空信息的弹丸反射能量计算模型。通过弹丸穿过激光光幕位置信息,结合弹丸反射特性,构建弹丸辐射亮度计算模型;根据弹丸长度和激光光幕厚度的关系,分析弹丸在不同时空分布的反射面积,推导出弹丸穿过激光光幕的反射能量模型。通过理论模型进行定量计算和仿真分析。研究结果表明:弹丸有效反射面积随着过幕时间先增加,后保持不变,再逐渐减小,弹丸反射能量随着有效反射面积呈现相同的变化趋势同时,弹丸表面反射能量随着探测距离增加而减小;模拟实验结果与仿真分析一致。

Traditional light screens have low detection performance and,therefore,are sometimes unable to detect targets.To solve this problem,this paper establishes a model for calculating the projectile reflection energy containing space-time information based on the detection mechanism of laser light screen.Using the position information of the projectile passing through the laser screen and the reflection characteristics of the projectile,a model for calculating projectile radiance is constructed.According to the relationship between the length of the projectile and the thickness of the laser screen,the reflection areas of the projectile in different space-time distributions are analyzed,with the reflection energy model of the projectile passing through the laser screen deduced.Through the quantitative calculation and simulation analysis of the theoretical model,the results are obtained that with the passing time,the effective reflection area of the projectile increases first,then remains unchanged,and finally gradually decreases,and that the projectile reflection energy changes with the effective reflection area in the same way.The reflected energy of the projectile surface decreases with the increase in detection distance.The simulation results are consistent with the simulation analysis.