资源简介
数据包里有原始数据,打开就可以看到效果。先用采集卡采集信号,得到信号后做EMD去趋势处理,去直流处理,然后时域分析波形(脉冲宽度等),频域分析(峰值频率,低频,中心频率等);
代码片段和文件信息
function [allmode] = eemd(Y NoiseLevel NE numImf varargin)
% fast EMD/EEMD/CEEMD code:
% Copyright (C) RCADA National Central University; 2013
% ***** For Educational and Academic Purposes Only *********
% Author : Yung-Hung Wang RCADA NCU
%
% Please Cite:
% Y. H. Wang C. H. Yeh H. W. V. Young K. Hu and M. T. Lo
% “On the computational complexity of the empirical mode decomposition
% algorithm“
% Physica A: Statistical Mechanics and its Applications vol. 400Issue 15 pp. 159-167 2014
%
% Usage:
% (A) [allmode]=eemd(Y NoiseLevel NE numImf)
% (B) [allmode]=eemd(xNoiseLevelNEnumImfrunCEEMDmaxSifttypeSplinetoModifyBCrandTypeseedNocheckInput);
%---------------------------------------------------------------
% INPUTS :
% Y: input signal
% NoiseLevel: noise level
% NE: ensemble number; if NE=1 and NoiseLevel = 0 then run EMD [2]
% numImf: number of prescribed imf; if it is less than zeroit will be log2(n) n=data length
%
%-------------Additional Input Properties-----------------------------------------
% runCEEMD: default=0; 0: run EEMD [3]; 1: CEEMD [4] add anti-phase noise so input signal is reconstructed;
% maxSift:default = 10; sifting iteration number;
% typeSpline: default=2; 1: clamped spline; 2: not a knot spline; 3: natural cubic spline;
% toModifyBC: default=1; 0: None ; 1: modified linear extrapolation; 2: Mirror Boundary
% randType: fefault=2; 1: uniformly distributed random noise; 2: gaussian white noise
% seedNo: default=1; random seed number in generating white noise; The seed number must be an integer between 0 and 2^32 - 1
% checkSignal: default=1; 0=> dont check the input signal; 1: check there is any NaN or Infinity in input;
%
% OUTPUTS :
% allmode[m][t]: returned imfs; m=imf index t=time index
%
% References
% [1] Y. H. Wang C. H. Yeh H. W. V. Young K. Hu and M. T. Lo
% “On the computational complexity of the empirical mode decomposition algorithm“
% Physica A: Statistical Mechanics and its Applications vol. 400 Issue 15 pp. 159-167 2014
% [2] N. E. Huang Z. Shen S. R. Long M. L. Wu H. H. Shih Q. Zheng N. C. Yen C. C. Tung and H. H. Liu
% “The Empirical Mode Decomposition and Hilbert spectrum for nonlinear and non-stationary time series analysis“
% Proc. Roy. Soc. London A Vol. 454 pp. 903995 1998.
% [3] Z. Wu and N. E. Huang “Ensemble Empirical Mode Decomposition: A
% Noise-Assisted Data Analysis Method“ Advances in Adaptive Data Analysis vol. 1 pp. 1-41 2009.
% [4] J. R. Yeh J. S. Shieh and N. E. Huang “Complementary ensemble empirical
% mode decomposition: A novel noise enhanced data analysis method“
% Advances in Adaptive Data Analysis vol. 2 Issue 2 pp. 135156 2010.
%
%
fprintf(‘Copyright (C) RCADA NCU Taiwan.\n‘);
allmode = [];
%verifyCode = 20041017; % For verification of emd
[YNoiseLevelNE
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 112697 2014-04-01 17:02 FEEMD\BFVL.mat
文件 7870 2014-09-04 17:56 FEEMD\eemd.m
文件 22140 2014-09-04 16:52 FEEMD\emd.mexa64
文件 16896 2014-08-01 13:27 FEEMD\emd.mexw32
文件 21504 2014-09-04 17:26 FEEMD\emd.mexw64
文件 2551 2015-06-15 09:38 FEEMD\example_eemd.asv
文件 2541 2015-06-22 11:00 FEEMD\example_eemd.m
文件 756829 2014-04-01 17:01 FEEMD\ref.pdf
文件 53820 2015-06-06 22:59 FEEMD\直探头 BFA086 20150605 202719 衰减200m.txt
文件 53908 2015-06-16 22:16 FEEMD\直探头 EDH004 20150616 220903 50m.txt
文件 53947 2015-06-16 22:10 FEEMD\直探头 EDH004 20150616 221000.txt
文件 54282 2015-06-18 22:01 FEEMD\直探头 EDH004 20150618 215701.txt
文件 54324 2015-06-18 18:10 FEEMD\直探头 EDH019 20150618 180538.txt
目录 0 2015-06-22 10:56 FEEMD
----------- --------- ---------- ----- ----
1213309 14
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