基于EEMD的光电式武器射频测试信号处理  

Signal Processing of Photoelectric Weapon Firing Frequency Tests Based on EEMD

作　　者：刘小彦 刘吉[2] 于丽霞[3] LIU Xiaoyan;LIU Ji;YU Lixia(Chongqing Water Resources and Electeic Engineering College,Chongqing 402160,China;Science and Technology on Electronic Test and Measurement Laboratory,North University of China,Taiyuan 030051,Shanxi,China;College of Information and Communication Engineering,North University of China,Taiyuan 030051,Shanxi,China)

机构地区：[1]重庆水利电力职业技术学院,重庆402160 [2]中北大学电子测试技术重点实验室,山西太原030051 [3]中北大学信息与通信工程学院,山西太原030051

出　　处：《火炮发射与控制学报》2023年第1期19-23,共5页Journal of Gun Launch & Control

基　　金：山西省自然科学基金(201901D111159);山西省归国留学人员科研基金(HGKY2019068);山西省基础研究计划项目资助项目(202103021224188)。

摘　　要：射击频率是评价连发武器总体性能的一个重要参数,以激光光幕为核心的光电探测技术具有非接触、全天候、可重复、高精度等优势而得到广泛的应用。针对光电式高射频武器射频测试信号干扰强、难识别的特点,采用EEMD算法对原始信号进行分解,得到本征模函数,结合信号自身的频谱特性,对信号进行滤波、降噪处理;结合弹丸过靶信号的特征,采用下降沿一半法拾取弹丸过靶信号的特征点,计算得出武器的射频测试结果。在某型号高射频武器试验中,将该算法得到的测试结果与天幕靶测试结果相比,误差在0.1%以内,精度相对较高,因而将该算法用于光电式武器射频测试系统信号处理是切实可行的。Firing frequency is an important parameter to evaluate the overall performance of a weapon capable of firing bursts.Photoelectric detection technology with laser light curtains as the core has been widely used with the advantages of contact absence,all-weather adaptability,repeatability and high precision.Because of interference and identification issues associated with firing frequency test signals of high firing frequency photoelectric weapons,the EEMD algorithm is used to decompose the original signal,and the intrinsic mode function(IMF)is obtained.Based on the spectral characteristics of the signal itself,the signal is filtered and noise-reduced.Considering the characteristics of the signal gene-rated by target-penetrating projectiles,the falling edge half method is used to pick up characteristic points of the signal,and then the firing frequency test result of the weapon is calculated.In the test of a high firing frequency weapon,test results obtained by this algorithm have an error of less than 0.1%compared with test results using sky screens,demonstrating higher accuracy.Therefore,it is practical to apply the algorithm to signal processing for the firing frequency test system of photoelectric weapons.

关 键 词：射击频率 EEMD算法 频谱特性 过靶信号 特征点 

分 类 号：TJ765.4[兵器科学与技术—武器系统与运用工程]