摘要
硬目标侵彻仿真得到的速度、加速度信号频率成分非常丰富 ,而且是非平稳的随机过程 ,小波分析具有良好的时频局部化性质 ,可用来分析这些信号。在总结小波、小波包理论的基础上 ,利用小波包将仿真得到的加速度信号分解到相邻的不同频率段上 ,然后用信号重构方法对各个频率段上的信号进行重构 ,并作了相应的频谱分析 ,最后对小波包分析的工程意义进行了探讨。
The acceleration and velocity signals obtained from simulation of hard target penetration are unsteady, and comprise plenty of frequency. Owing to the excellent characteristic of time frequency localization, wavelet packet is rather suitable for analyzing this kind of signals. In this paper, based on summarizing the wavelet and wavelet packet theory, the acceleration signal is decomposed into different frequency bands by wavelet packet at first, then the signal of each frequency band is reconstructed and their spectrum is analyzed. In the end the engineering significance of wavelet packet is discussed.
出处
《探测与控制学报》
CSCD
北大核心
2002年第4期34-38,共5页
Journal of Detection & Control
关键词
小波变换
弹丸
小波
小波包
侵彻仿真
分解
重构
wavelet
wavelet packet
penetration simulating
signal decomposition and reconstruction
