FFT Analysis Tool in Powergui

363 vues (au cours des 30 derniers jours)
Luke Perabo
Luke Perabo le 24 Août 2016
I want to use the powergui block for fft analysis.I am measuring three phase signals using a current measurement block connected to a scope. After running the simulation , the powergui's fft analysis does not display anything and the name and input fields display '-Empty-'. Can anyone please suggest a solution to this problem, urgently.
  27 commentaires
Kaustubh Kasle
Kaustubh Kasle le 7 Sep 2022
hello,
in my case it is selected only a small part of the whole signal ( red coloured ) but i want to do the analysis of the whole signal in the complete time duration.
can someone help??
Mounir Benadja
Mounir Benadja le 15 Nov 2022
Hello,
The Scope must be Configured with Structure With Time.
Thank You.

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Réponses (7)

Pradipta Kumar Pal
Pradipta Kumar Pal le 16 Août 2019
Reply from Shishir Dwivedi, IN MathWorks Support <support@mathworks.in>:
I understand that you are not able to view the logged signal names/values in Powergui FFT Analysis tool & are able to view the "Output" signal as defined in the scope block.
The reason for this is that, in the Model Configuration Parameters in "Data Import/Export" Section, the option "Single simulation output" has been selected, this parameter enforces Simulink to return simulation outputs within a single Simulink.SimulationOutput object [As the name is provided as "Out" here, hence all Simulation Outputs are contained in this variable].
If you deselect this option, and Simulate the model, you would be able to see "Output" signal in the MATLAB Workspace and the Powergui FFT Analysis tool will reflect the name/values of Signals as expected.
  18 commentaires
INEL Tech Centre
INEL Tech Centre le 14 Avr 2022
kindly help to resolve this error. what other settings need to be modified?
Muzammil Ahmed
Muzammil Ahmed le 7 Jan 2024
Thank You. It was useful.

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Swarooph
Swarooph le 24 Août 2016
Modifié(e) : Swarooph le 24 Août 2016
For the FFT analysis tool to pop up data names, you need to satisfy 2 things:
  1. You should have run the simulation
  2. MATLAB workspace should have a struct variable including time with the results of the simulation. (e.g. you can use the Scope blocks to log data into the workspace, note that this needs to be struct with time)
After you do 1 and 2, you should be able to see the names pop up in the FFT analysis tool. If you don't, try clicking the 'Refresh' button to see if that helps.

Aarti Srivastava
Aarti Srivastava le 17 Avr 2018

Make sure to go to the settings of Scope, Scope-> Settings -> History -> Save to workspace -> Name the desired variable -> change the format from 'Array' to 'Structure with Time' and run the program.

In the Powergui, open FFT tool, and select the signal using the name given earlier from the list of Available signals.

  3 commentaires
mohammad norshazwan
mohammad norshazwan le 20 Déc 2021
Thank you! Very useful and helpful for me. Appreciated it so much!
ZHIJUN LI
ZHIJUN LI le 4 Déc 2022
Thank you. it works!

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V Vaishnavi Kumar
V Vaishnavi Kumar le 8 Mar 2018
Observed similar thing. In addition to above steps mentioned, set the solver in block parameters of power gui to discrete and set sample time
  2 commentaires
inayat ali
inayat ali le 22 Août 2022
I have a problem in matlab 2021a I have done FFT analysis but can not able to either edit the axes or save the result as the window tools bar(like edit , save, saveas etc) are not appear in fft screen So please help me if possible
chagamreddy venkata subba reddy
i have also same problem. i am unable to open in property editor

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rajanand patnaik
rajanand patnaik le 1 Oct 2018
i want to check FFT analysis using simscape components, but by using powergui its not working can anyone suggest me an idea to check the FFT Will be appreciated.
Thanks
  3 commentaires
Sukanta Roy
Sukanta Roy le 8 Juil 2022
Thanks a lot. This is helpful for me, where I was really lost why the dataset is inside that Out simulation output packet, and powergui FFT was having empty list. Thanks again.
Walter Roberson
Walter Roberson le 12 Déc 2022

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Ameer Hamza Siddiqui
Ameer Hamza Siddiqui le 4 Mai 2019
yes this methodis not working
  2 commentaires
rakan albaz
rakan albaz le 1 Août 2020
Reply from Shishir Dwivedi, IN MathWorks Support <support@mathworks.in>:
I understand that you are not able to view the logged signal names/values in Powergui FFT Analysis tool & are able to view the "Output" signal as defined in the scope block.
The reason for this is that, in the Model Configuration Parameters in "Data Import/Export" Section, the option "Single simulation output" has been selected, this parameter enforces Simulink to return simulation outputs within a single Simulink.SimulationOutput object [As the name is provided as "Out" here, hence all Simulation Outputs are contained in this variable].
If you deselect this option, and Simulate the model, you would be able to see "Output" signal in the MATLAB Workspace and the Powergui FFT Analysis tool will reflect the name/values of Signals as expected.
rajalakshmi D
rajalakshmi D le 26 Juil 2021
Yes . Click the model settings---- Configuration parameters settings in simulink page. Click data import / Export . Deselect single simulation output. Then run the simulation then proceed with power gui

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zeh essiane Raymond pavelli
I have a question. I want to show in a same Time more than one scope in fft analysis. Hop i can do it ?

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