HHT滤波特性在sEMG信号滤波中的应用
|
摘要
在常规HHT滤波方法基础上,考虑sEMG信号频带分布特性,设计了一种新的HHT滤波方法.该方法设计了针对IMF分量的噪声能量抑制函数,用来抑制各分量可能包含的噪声,再将每个修正的IMF分量叠加,得到去噪后的sEMG信号.通过实验比较可以看出,考虑sEMG信号频带分布特性的HHT滤波方法可以一定程度上解决噪声与信号处于同一IMF上的情形,获得比常规HHT滤波方法更好的效果.
Conventional HHT filtering method is introduced briefly.Considering the deficiency of the conventional HHT filter and frequency distribution of sEMG signal,a noise suppression function is designed to suppress the noise contained in every IMF.Furthermore,by adding all revised IMF together,the filtered sEMG signal is gained.The experiments show that the method can achieve a satisfactory effect.
Conventional HHT filtering method is introduced briefly.Considering the deficiency of the conventional HHT filter and frequency distribution of sEMG signal,a noise suppression function is designed to suppress the noise contained in every IMF.Furthermore,by adding all revised IMF together,the filtered sEMG signal is gained.The experiments show that the method can achieve a satisfactory effect.
引文
[1]Huang N,Shen Z,Long S R.The empirical mode de-composition and the Hilbert spectrum for non linear andnon-stationary time series analysis[J].Proceedings oftheRoyal Society ofLondon,1998,454:903-995.
[2]Yue HY,Guo HD,Han C M.ASAR interfere-gram fil-ter based on the empirical mode decomposition method[J].Geo-science and Remot Sensing Symposium,2001,(5):2061-2063.
[3]Boudraa AO,Cexus J C,Saidi Z.EMD-based signal noisereduction[J].International Journal ofSignal processing,2004,1(1):33-37.
[4]张雯,程家兴.基于EMD和小波去噪处理的信号瞬时参数提取[J].信号处理,2004,25(2):512-513.Zhang Wen,Cheng Jiaxing.Instantaneous parameters ex-traction based on the empirical mode decomposition andwavelet de-noise technique[J].Signal Processing,2004,25(2):512-513.(in Chinese)
[5]王建国,王孝通,徐晓刚.经验模态分解及其应用研究[J].计算机工程与应用,2010,46(4):120-124.Wang Jianguo,Wang Xiaotong,Xu Xiaogang.Empiricalmode decomposition and its application[J].ComputerEngineering and Applications,2010,46(4):120-124.(in Chinese)
[6]曲从善,路廷镇,谭营.一种改进型经验模态分解及其在信号消噪中的应用[J].自动化学报,2010,36(1):67-73.Qu Congshan,Lu tingzhen,Tan Ying.Amodified empir-ical mode decomposition with applications to signal de-noising[J].Acta Automatic Sinica,2010,36(1):67-73.(in Chinese)
[7]陆金铭,王醇涛,周海港.基于EMD的柴油机失火故障诊断[J].江苏科技大学学报:自然科学版,2009,23(3):234-238.Lu Jinming,Wang Chuntao,Zhou Haigang.Misfire faultdiagnosis of diesel engine based on EMD[J].Journal ofJiangsu University ofScience and Technology:Natural Sci-ence Edition,2009,23(3):234-238.(in Chinese)
[8]李志雄,朱航,刘杰.基于EMD的中国大陆强震活动特征分析[J].地震,2007,27(3):57-62.Li Zhixiong,Zhu Hang,Liu Jie.Analysis on characteris-tics of strong earthquake activity in Chinese mainlandbased on EMD method[J].Earthquake,2007,27(3):57-62.(in Chinese)
[9]Ponager J,Christensen H.Power spectrum analysis of theEMG pattern in normal and diseased muscles[J].Journalofthe Neurological Sciences,1989,94(1/2/3):283-294.
[2]Yue HY,Guo HD,Han C M.ASAR interfere-gram fil-ter based on the empirical mode decomposition method[J].Geo-science and Remot Sensing Symposium,2001,(5):2061-2063.
[3]Boudraa AO,Cexus J C,Saidi Z.EMD-based signal noisereduction[J].International Journal ofSignal processing,2004,1(1):33-37.
[4]张雯,程家兴.基于EMD和小波去噪处理的信号瞬时参数提取[J].信号处理,2004,25(2):512-513.Zhang Wen,Cheng Jiaxing.Instantaneous parameters ex-traction based on the empirical mode decomposition andwavelet de-noise technique[J].Signal Processing,2004,25(2):512-513.(in Chinese)
[5]王建国,王孝通,徐晓刚.经验模态分解及其应用研究[J].计算机工程与应用,2010,46(4):120-124.Wang Jianguo,Wang Xiaotong,Xu Xiaogang.Empiricalmode decomposition and its application[J].ComputerEngineering and Applications,2010,46(4):120-124.(in Chinese)
[6]曲从善,路廷镇,谭营.一种改进型经验模态分解及其在信号消噪中的应用[J].自动化学报,2010,36(1):67-73.Qu Congshan,Lu tingzhen,Tan Ying.Amodified empir-ical mode decomposition with applications to signal de-noising[J].Acta Automatic Sinica,2010,36(1):67-73.(in Chinese)
[7]陆金铭,王醇涛,周海港.基于EMD的柴油机失火故障诊断[J].江苏科技大学学报:自然科学版,2009,23(3):234-238.Lu Jinming,Wang Chuntao,Zhou Haigang.Misfire faultdiagnosis of diesel engine based on EMD[J].Journal ofJiangsu University ofScience and Technology:Natural Sci-ence Edition,2009,23(3):234-238.(in Chinese)
[8]李志雄,朱航,刘杰.基于EMD的中国大陆强震活动特征分析[J].地震,2007,27(3):57-62.Li Zhixiong,Zhu Hang,Liu Jie.Analysis on characteris-tics of strong earthquake activity in Chinese mainlandbased on EMD method[J].Earthquake,2007,27(3):57-62.(in Chinese)
[9]Ponager J,Christensen H.Power spectrum analysis of theEMG pattern in normal and diseased muscles[J].Journalofthe Neurological Sciences,1989,94(1/2/3):283-294.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心