侵彻靶板过程中刚体过载特征提取方法

Study on Rigid Body Overload Feature Extraction Method in Penetrating Target Process

针对引信动态环境非常复杂各种振动非常丰富,侵彻加速度信号含有许多瞬变成分,是非平稳时变信号,采用局部均值分解算法自适应的对侵彻加速度信号进行分解,从而提取加速度信号刚体过载特征和加速度信号频率分布特性,有效准确地对信号机理进行分析。为了使得侵彻特征更加明显,利用半正弦波形作为匹配波形,采用匹配相关算法得到侵彻过程层穿越的特征信号,更有效实时地进行层识别或者空穴识别。

Fuse dynamic environment is very complex and rich in a variety of vibration.The Penetration acceleration signal is non-stationary time-varying signal which contains many transient components.In this paper,penetration acceleration signal is decomposed using the Local Mean Decomposition algorithm adaptively,which can extract the acceleration signal Rigid overload characteristics and acceleration signal frequency distribution characteristics.This method is effective and accurate to analyze signal mechanism.In order to make more apparent penetration characteristics,this paper uses matching algorithm get the characteristic signal of across layer in the penetration process,Half-sine shaped as a matching waveform.The algorithm can more effectively real-time identificated layers or hole recognition.