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File Exchange
>
Data Analysis
>
Empirical Mode Decomposition
Add rating or comment
How to Install
Author:
OriginLab Technical Support
Date Added:
3/24/2021
Last Update:
9/30/2022
Downloads (90 Days):
162
Total Ratings:
3
File Size:
205
KB
Average Rating:
File Name:
Empirical ...on.opx
File Version:
1.10
Minimum Versions:
2021b (9.85)
License:
Free
Summary:
Perform empirical mode decomposition
Screen Shot and Video:
Description:
Purpose
This tool can be used to perform empirical mode decomposition, also perform the spectrum analysis, including frequency transform and Hilbert-Huang transform.
Installation
Download the file Empirical Mode Decomposition.opx, and then drag-and-drop onto the Origin workspace. An icon will appear in the Apps gallery window.
Operation
With the signal column in worksheet selected, click the app icon from the Apps gallery window. Then a dialog will pop up, then change the settings in dialog accordingly, then click OK button.
Dialog Setings
Input tab
Input: Specify the input signal. You can select from the context menu, or open the Column Browser from the context menu, and then select signal column.
Sifting tab
Threshold: Specify the threshold at which the overall sifting process will stop.
Maximum IMFs: Specify how many IMFs (Intrinsic Mode Functions) to compute. The maximum number of IMFs to compute. If Auto (-1), it will compute IMFs until the stop condiction is met.
Show IMF Options: Check to show the options for computing the next IMF from a dataset.
Show Envelope Options: Check to show the options for interpolating the amplitude envelope of a signal.
Show Extrema Options: Check to show the options for identifying and pading the extrema in a signal.
IMF Options group:
Scale Factor: The average of the upper and lower envelope is multiplied by this value before being subtracted from the data. This value should be between 0 and 1 (exclude 0 but include 1).
Maximum Iterations: Maximum number of iterations to compute.
Energy Diff. Threshold (in Decibels): Threshold for energy difference (in decibels) between IMF and residual to stop overall sift.
Stop Method: How to stop sifting. Options include Standard Deviation Threshold, Rilling Metric and Fixed Number.
St. Dev. Threshold: When Stop Method is Standard Deviation Threshold, this value is the threshold at which the sift of each IMF will be stopped.
Rilling Metric: When Stop Method is Rilling Metric, an evaluation function (E) is defined by dividing the residual by the mode amplitude. The sift continues until E < sd1 for the fraction (1-alpha) of the data, and E < sd2 for the remainder. This parameter is for specifying sd1, sd2, and alpha sequentially, separated by space.
Envelope Options group:
Interpolation Method: Specify interpolation method used for interpolating the amplitude envelope of a signal. Options include B-Spline and PCHIP 1-D Monotonic Cubic.
Extrema Options group:
Pad Width: Number of additional extrema to add to the start and end.
Parabolic Extrema: check to refine the extrema positions by parabolic interpolation.
Pad Extrema Magnitude Options group
Statistic Length: How many data to use for calculating the statistic for padding extrema magnitudes.
Spectrum Analysis tab
Frequency Transform: Check to perform frequency transform.
Frequency Transform Options group
Sample Rate (Hz): Specify sampling rate. If Auto, it will compute from the X of the signal.
Method: The method for computing the frequency stats. Options include Hilbert Transform, Quadrature Transform, Direct Quadrature Transform, and Amplitude Normallized Hilbert Transform,
Window Length for Smooth Phase: Specify length of window when smoothing the unwrapped phase.
Hilbert-Huang Transform: Check to perform Hilbert-Huang Transform. Also, frequency transform is performed together.
Hilbert-Huang Transform Options group
With Time Dimension (2D): Check to consider the time dimension, that is, if checked, the Hilbert-Huang transform instataneous frequency and instantaneous amplitude time-series and represents the energy of a signal across time and frequency, if not checked, only across frequency.
Instantaneous Amplitude Weighted: If checked, instantaneous amplitude is used as weight, otherwise, no weight is used.
Frequency Start From: The start value of frequency range.
Frequency End At: The end value of frequency range.
Number of Frequencies: How many frequencies is used for the frequency range.
Frequency Type: Specify to use Linear or Ln spacing for frequency.
Mode: Specify the mode of sum, Energy or Amplitude.
Output tab
Output: Specify where to output the results. New Sheet will create new sheet in the same workbook of the source signal for the results, and New Book will create a new workbook for the results.
OK and Cancel Buttons: Click OK button to output the results and close dialog, and click Cancel button to close the dialog only.
Note:
The algorithm used in this app is from
this page
, for more details about algorithm, please refer to that page.
Updates:
v1.1 2022/3/4 Fix emd package version issue
Reviews and Comments:
09/26/2022
OriginLab
Hi herman,
We've already had a plan to improve the documentaion for Apps. And, my colleague is working on this, we will share with you the page once it is done.
Thanks,
Shirley
OriginLab
09/23/2022
herman
This is a well-written piece of Python software. However, this application needs documentation badly to explain its use and output. The same is true of some other complex applications offered by Origin.
07/04/2022
YUE520
嗯嗯
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