基于形态分层的膛内高速运动体摆动角度测量方法研究

Study on measurement method of high speed motion body swing angle in chamber based on morphological stratification

在使用微波干涉仪对膛内高速运动体目标摆动角度的测量中,提出一种基于形态分层的方法对膛内目标摆动角度进行估计。首先对在靶场中采集到的实际信号预处理并通过短时傅里叶变换获取高速运动体的纵向速度变换规律;接着对预处理后的信号进行小波变换和局部均值分解(LMD)变换相结合的形态分层处理获得膛内高速运动体目标的微动特征;最后根据实际的高速运动目标初始偏移程度对其摆动角度进行估计。研究表明,通过形态分层的分析方法能够定量的获取到膛内高速运动目标摆动角度大小的变换规律,为判断运动目标本身的稳定性和身管内的平衡性提供依据。

In this paper,a method based on morphological stratification is proposed to estimate the swinging angle of a high-speed moving target in a chamber by using microwave interferometer.On first collected in the range of the actual signal preprocessing and by short-time Fourier transformation for the longitudinal velocity transformation law of motion of body,then after preprocessing of the signal wavelet transform and LMD transform combined form of stratification in the bore with a high speed micro characteristics of body target,according to the actual high-speed motion target initial swinging angle of deviation degree of its estimates.The results show that the morphological stratification method can quantitatively obtain the changing law of the swinging angle of high-speed moving target in the chamber,which provides a basis for judging the stability of the moving target and the balance inside the barrel.