EEMD在爆破振动信号去噪中的应用
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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.
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.
引文
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[10]陈可,李野,陈澜.EEMD分解在电力系统故障信号检测中的应用[J].计算机仿真,2010,27(3):263-266.
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[12]祝志慧,孙云莲,李洪.基于EMD的时频分析方法的电力故障信号检测[J].武汉大学学报(工学版),2007,40(5):119-124.
[13]曹冲锋,杨世锡,杨将新.大型旋转机械非平稳振动信号的EEMD降噪方法[J].振动与冲击,2009,28(9):33-39.
[14]李海涛,王成国,许跃生,等.基于EEMD的轨道—车辆系统垂向动力学的时频分析[J].中国铁道科学,2007,28(5):24-30.
[15]唐飞勇,王意堂,梁开水.爆破振动信号特征分析的应用探讨[J].爆破,2010,28(4):109-111.
[16]费鸿禄,马诺诺.坝基开挖爆破振动频带小波能量分析[J].爆破,2010,27(3):99-104.
[2]李洪涛,卢文波,舒大强.小波分析在爆破振动加速度推求中的应用[J].爆破器材,2006,35(5):4-7.
[3]卢文波,赖世骧,舒大强,等.关于爆破振动速度和加速度等效性问题的讨论[J].爆破,2000,17(S1):11-14.
[4]高勇军,陈小波,王伟策.小波分析在爆破地震信号降噪中的应用[J].爆破,1999,16(3):3-7.
[5]谢全民,龙源,钟明寿.基于小波、小波包两种方法的爆破振动信号对比分析[J].工程爆破,2009,15(1):5-9.
[6]徐学勇,程康.爆破震动信号模极大值小波消噪方法的改进[J].爆炸与冲击,2009,29(3):194-198.
[7]熊正明,中国生.基于平移不变小波爆破振动信号去噪的应用研究[J].金属矿山,2006(2):12-15.
[8]李夕兵,张义平,左宇军,等.岩石爆破振动信号的EMD滤波与消噪[J].中南大学学报(自然科学版),2006,37(1):150-154.
[9]文莉,刘正士,葛运建.小波去噪的几种方法[J].合肥工业大学学报,2002,25(2):167-172.
[10]陈可,李野,陈澜.EEMD分解在电力系统故障信号检测中的应用[J].计算机仿真,2010,27(3):263-266.
[11]WUZhao-hua,HUANG E.Ensemble empirical mode decom-position—a noise-assisted data analysis method[R].Calver-ton:Center for Ocean-Land-Atmosphere Studies,2005.
[12]祝志慧,孙云莲,李洪.基于EMD的时频分析方法的电力故障信号检测[J].武汉大学学报(工学版),2007,40(5):119-124.
[13]曹冲锋,杨世锡,杨将新.大型旋转机械非平稳振动信号的EEMD降噪方法[J].振动与冲击,2009,28(9):33-39.
[14]李海涛,王成国,许跃生,等.基于EEMD的轨道—车辆系统垂向动力学的时频分析[J].中国铁道科学,2007,28(5):24-30.
[15]唐飞勇,王意堂,梁开水.爆破振动信号特征分析的应用探讨[J].爆破,2010,28(4):109-111.
[16]费鸿禄,马诺诺.坝基开挖爆破振动频带小波能量分析[J].爆破,2010,27(3):99-104.
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