九光幕阵列测量终点弹道弹丸飞行参数方法研究  

Research on measuring method for terminal trajectory of the flying projectile parameters by nine-light-screens-array

作　　者：田会[1,2] 倪晋平 Tian Hui;Ni Jinping(School of Opto-electronic Engineering,Xi＇an Technological University,Xi＇an 710021,China;Shaanxi Province Key Lab of Photoelectric Measurement and Instrument Technology,Xi＇an 710021,China)

机构地区：[1]西安工业大学光电工程学院,西安710021 [2]陕西省光电测试与仪器技术重点实验室,西安710021

出　　处：《仪器仪表学报》2018年第5期17-23,共7页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(61471289);国防科工局技术基础科研项目(JSJL2016208B005);陕西省教育厅重点实验室计划项目(17JS050)资助

摘　　要：终点弹道段弹丸飞行速度低,受外界因素影响弹丸运动轨迹为变速曲线运动,六光幕阵列测量模型无法准确测量弹丸的飞行参数,针对此类问题,提出一种九光幕阵列测量方法。在现有六光幕阵列阵形上增加了3个与原有光幕对应平行的光幕,通过两点速度衰减公式计算出飞行弹丸的阻力加速度,修正弹丸运动曲线方程,利用六光幕阵列测量公式,实现任意方向飞行弹丸飞行参数的准确测量。结合12.7 mm全弹道测速试验,验证了阻力加速度计算方法的有效性,采用七光幕阵列测量4.5 mm气枪弹着靶坐标,与纸板靶上的弹孔坐标进行比对,在2 m×2 m靶面内坐标测量误差小于3 mm。研究的方法拓宽光幕阵列在终点弹道测量领域的应用,特别适用于弹道系数未知的特种弹丸飞行参数测量。The flying path of the projectile in the terminal trajectory may become the variable velocity curve due to the low flying velocity and the ambient factors. The six-light-screens-array cannot accurately measure the projectile flying parameters for this terminal trajectory. To solve the mentioned technical problems,one kind of nine-light-screens-array measuring method is proposed in this paper. Based on the original six-light-screens-array model,another three light-screens-array in parallel to the original lightscreens-array are added. The resistance acceleration of the flying projectile can be achieved with the method of two-point velocity attenuation,which is used to correct the spatial motion curvilinear equation. Then,the flying parameters of projectiles in any direction can be accurately measured with the combination of measuring formula for six-light-array. The resistance acceleration calculation method is verified by the 12. 7 mm projectile full trajectory velocity measurement tests. Compared with the impacting coordinates obtained by seven-light-screens-array with 4. 5 mm air gun bullet,experimental results show that the measuring error is less than 3 mm in 2 m × 2 m area. The proposed method in the paper broadens the application of light-screens-array measuring method in the field of terminal trajectory measurement. Especially,it is applicable to the measurement of special projectile flying parameters with unknown ballistic coefficient.

关 键 词：外弹道飞行参数 变速曲线弹道 光幕阵列 着靶坐标 阻力加速度测量 

分 类 号：TH721.1[机械工程—仪器科学与技术] TJ012.36[机械工程—精密仪器及机械]