基于有效短时能量谱的侵彻加速度信号穿层特征提取方法  

Penetration Acceleration Signals Drill Layer Characteristics Extracting Method Based on Effective Short-time Energy Spectrum

作　　者：李彩芳 郜王鑫 粱灏鸿 邵志豪 张珂 LI Caifang;GAO Wangxin;LIANG Haohong;SHAO Zhihao;ZHANG Ke(Science and Technology on Electromechanical Dynamic Control Laboratory,Xi'an 710065,China;No.212 Institute of China Ordnance Industry Corporation,Xi'an 710065,China)

机构地区：[1]机电动态控制重点实验室,陕西西安710065 [2]中国兵器工业集团第二一二研究所,陕西西安710065

出　　处：《探测与控制学报》2024年第4期79-86,共8页Journal of Detection & Control

摘　　要：针对高速侵彻条件下加速度信号混叠严重的问题,提出一种基于有效短时能量谱的侵彻加速度信号穿层特征提取方法。该方法首先通过计算加速度有效值,消除实测加速度信号中叠加的干扰振荡信号;再对有效加速度信号加窗分帧,减少频谱泄漏和振铃效应,并计算每帧加速度信号能量得到蕴含穿层信息的有效短时能量谱;最后提取效短时能量谱的最大值包络得到战斗部穿层特征。仿真结果表明,该算法在高速侵彻复杂工况条件下能够准确地提取出战斗部穿层特征和层识别。In order to solve the problem that acceleration signals are seriously aliased under high-speed penetration conditions,this paper proposed a new method of extracting drill layer characteristics of penetration acceleration signals based on effective short-time energy spectrum.By calculating the effective value of instantaneous accelerations,the method eliminated the interference oscillation signal superimposed in the measured acceleration signal.Then the effective acceleration signal was divided into frames by windows to reduce spectrum leakage and ringing effect.And the energy of each frame acceleration signal was calculated to obtain the effective short-time energy spectrum containing the penetrating information.Finally,the maximum envelope of the effective short-time energy spectrum was extracted to obtain the warhead penetration characteristics.The simulation results showed that the algorithm could accurately extract the penetration characteristics and layer identification of the warhead under the complex conditions of high-speed penetration.

关 键 词：侵彻引信 加速度有效值 加窗分帧 短时能量 

分 类 号：TJ43[兵器科学与技术—火炮、自动武器与弹药工程]