摘要
为解决战斗部破片速度测试中信号难于处理的问题,讨论了破片信号处理算法。采用小波分解、重构的方法对信号进行去噪;采用峰值法进行破片计时特征点的拾取;采用双正交小波,依据波形趋势及宽度在不同尺度上查找峰值,解决波形起伏大的问题;采用相关系数法,解决破片先进后出的问题;采用Gabor变换,解决破片波形叠加的问题。进行了多种战斗部破片速度测试试验,结果表明:破片密度≤20片/m2时,捕获率可达98%以上,并可给出各破片的速度值。
Aiming to solve problems of warhead fragments signals processing, signal processing algorithm was discussed. The noise of signal was reduced by employing wavelet decomposition and reconstruction. The time of fragment pass though the target was obtained by adopting peak detection algorithm. Based on the method of search peak in different width scale and waveform trend by using double orthogonal wave- let, the problem of rolling waveform was solved. The problem of fragment first in, last out was analyzed, by using correlation coefficient al-gorithm. The problem of splicing of multiple waves was researched by employing Gabor transform which is an algorithm in joint time fre-quency analysis. Lots of fragments experiments of the different types of the warheads were conducted. Experimental results show that ： war-head fragments capture rate of system is better than 98%, and velocity of every fragment can be given when the density is less than 20 p/m^2.
出处
《弹箭与制导学报》
CSCD
北大核心
2013年第2期49-51,共3页
Journal of Projectiles,Rockets,Missiles and Guidance
基金
教育部科学技术研究重点项目(211027)
电子测试技术重点实验室基金(9140C1204041009)
电子测试技术重点实验室青年基金
中北大学科学基金资助
关键词
激光光幕
战斗部破片
速度
信号处理
laser screen
warhead fragments
velocity
signal analysis
