摘要
针对小波类去噪方法存在基函数的选择,同时未摆脱Fourier变换为基础带来的缺陷、EMD去噪存在模式混叠的问题,将EEMD去噪引入到爆破振动信号处理领域。首先利用仿真试验验证了EEMD克服了EMD的固有缺陷,然后分别利用小波、EMD、EEMD对数值微分所获取的加速度时程曲线进行低通去噪处理,对比结果表明:EEMD不仅具有更高的信噪比、更能充分保留信号本身固有的非平稳特性,而且得到的IMF分量也具有明显的实际物理意义。
Aim at the problem of function choosing,Fourier based transform and EMD denoising method existing in the wavelet de-noising method,the EEMD decomposition de-noising was introduced to blasting vibration signal processing field.Firstly,the simulation experiment was used to verify EEMD overcoming the faults of EMD.Secondly,the wavelet decomposition,EMD and EEMD were used respectively to low-pass denoising dispose the acceleration time-histories obtained by numerical differentiation.The comparison results show that the EEMD not only has higher SNR（signal to Noise Ratio）,but also keep stationary character in itself fully,and the IMF component obtained has obvious practical physical significance.
出处
《爆破》
CSCD
北大核心
2011年第2期17-20,59,共5页
Blasting
基金
贵州科技计划项目(SY2010365)
