小波阈值法在炮口振动信号消噪中的应用

The application of the wavelet de-noisng methods in the vibration of the gun

针对传统软硬阈值方法存在的估计小波系数连续性差和信号失真等问题,采用了三种改进的小波阈值消噪方法,通过对仿真含噪信号进行消噪分析及计算信噪比、赋范均方根误差等评价参数,表明改进的方法消噪效果良好,最后对实测航炮炮口振动信号进行消噪处理,分别从时域和频域两个角度进行比较分析,进一步验证了改进小波阈值函数方法在炮口振动信号消噪中的有效性。

Based on the traditional wavelet de-noising methods, which exist some problems such as bad continuity and signal distortion, three improved wavelet thresholding de-noising methods are adopted, Through the SNR and the RMSE of the simulation signal being calculated , they showed better than the traditional. And based on the de-noising procession about the real the vibration of the xx type navigate-gun between the time-domain and frequency-domain ,the study shows the validity of the improved wavelet thresholding methods to the vibration of the gun.