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
李彩芳 1郜王鑫 1粱灏鸿 1邵志豪 1张珂1
作者信息
- 1. 机电动态控制重点实验室,陕西西安 710065;中国兵器工业集团第二一二研究所,陕西西安 710065
- 折叠
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.
Abstract
In order to solve the problem that acceleration signals are seriously aliased under high-speed penetra-tion conditions,this paper proposed a new method of extracting drill layer characteristics of penetration accelera-tion signals based on effective short-time energy spectrum.By calculating the effective value of instantaneous ac-celerations,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Key words
penetration fuze/acceleration effectivity value/windowing and framing/short-time energy引用本文复制引用
出版年
2024
NETL
NSTL
万方数据