FFT Analysis on multiple "runs"

Hello,

Using DEWESoft X3 SP4, I am looking to record data from an accelerometer while performing a vehicle speed sweep. Ideally, a total of 5 speed sweeps would be performed, outputting 5 different data sets. I was wondering if there was a way to overlay all 5 data sets on the same FFT plot either by

1) Analyze multiple files on the same FFT plot (ie Data_001, Data_002, Data_003, etc) or

2) Setup the file to overlay "runs" on the same FFT plot (all data can be stored in the same file, if needed, or can be stored as a multifile)

Thanks in advance for your help.

Kierstein

Hello Kierstein,

you can open the first data file in analysis and then use the import function to import the relevant channels:

Here you can add multiple files at once:

Then select the channels you want to import and click the "Import channels" button to import them:

After the channels have been imported, you can graph them all at once on a single graph:

I hope this helps.

Aljaž

Thank you Aljaž for the quick and helpful response! I do have one more follow up question.

On the FFT plots, I know you can add the max peak values by using the max marker option.

Is there a way to save these values as a math/input channel so they can be used to create a new, separate plot?

Thanks again,

Kierstein

It's not possible save the values from the FFT visual control, but you can use a math formula to get the max peak:

'input/AmplFFT'{maxpos('input/AmplFFT')}

where maxpos() gives you the frequency of the peak and the 'input/FFT'{} gives you the amplitude at that frequency.

To improve the accuracy it is advisable to set the resolution of the FFT as high as possible, the easiest way is to set the Df to 1 Hz:

Let me know if you need any more information.

Aljaž

Can I access the software from multiple system? I have searched this on the Internet and they suggest me visiting https://uaewebsitedevelopment.com/seo-services-dubai/ and I did so, but there is a problem that I cannot apply the steps that are given there and for that i need some support.

Can I access the software from multiple system? I have searched this on the Internet and they suggest me visiting https://uaewebsitedevelopment.com/seo-services-dubai.html and I did so, but there is a problem that I cannot apply the steps that are given there and for that i need some support.