Problem with importing own data (TH) in Open Modal

[LorenzoLepori]

Good morning, I would like to ask you a question about importing data for OMA analysis. I have accelerometric time histories of n. 6 measurement channels. Through the py.uff library I generated the .UFF file only with dataset 58, while I wanted to define the geometry in oper modal next having the measurement imported. If I import the data in the sw however, I cannot view a plot of them or a way to calculate cross-power spectrum from the signals and then to perform the modal parameter estimation by the LSCF method. I wonder if, to do an OMA analysis with Open Modal, should I import the already calculated Cross Power Spectrum matrix, instead of the accelerometric time histories, in a .uff file. Otherwise, what is the correct way to use the program for an OMA with own data?

Thank you.

[miha-pirnat]

Hello,

i think the problem is missing UNITS (dataset 164) and INFO (dataset 151) fields. In dataset 58 you should have FRFs.

Here is an example of both fields (you can use these):

    -1
   151                                                                          
3803_VN2_silas_tab                                                                       
DefaultDecription                                                               
modaldata v1                                                                    
14-okt-16 13:09:10           0         0         0
14-okt-16 13:09:10  
Open Modal                                                                      
14-okt-16 13:09:10  
    -1
    -1
   164                                                                          
         9    User unit system         1
   1.0000000000000000D+00   1.0000000000000000D+00   1.0000000000000000D+00
   1.0000000000000000D+00
    -1

After importing you should be able to view your data in measurement tab (check ''use model'' dropdown menu):