FFT Analysis Tool in Powergui

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.

[aashish kumar]

i am also facing the same problem and till now i have not been able to sort it out.

[SACHU SEBASTIAN]

I am using MATLAB 2019a and i also faced this problem. when FFT analysis is done from Powergui The signals are shown as EMPTY .

The reason for this is that, in the Model Configuration Parameters in "Data Import/Export" Section, the option "Single simulation output" has been selected.

1. go to model configuration parameter and select Data Import/Export.
2. Untick the Single simulation output and click on Apply.
3. double tap the scope and go to Logging and select Log data to the workspace and select Structure with Time and click on Apply.
4. Run the simulation
5. double tap Powergui and select FFT Analysis.

You will see the magic

PS: It worked for me . It will work for you sure.

[Kanchan Jha]

it worked.. thank you so much

[Chetan Amminabhavi]

Where to Logging and select Log data to the workspace and select Structure with

[SUMIT PATIL]

It worked! Thanks!

[Pamela Jackson]

I do not see any scope or log data to workspace, mine is 2020a version

[rakan albaz]

Same here. I did the "log data to workspace" and "structure with time" in the scope, but it is still showing empty

[XIaokeng Shi]

It worked, I really appriciate it.

[Asutosh Dash]

Thank you..sachu sabastian sir

[Rakhee R]

Thank You Sir

[Sebastian Krupa]

Worked for me.

[juning zhang]

Thank you. It worked.

[NITHYA DEVI S M]

thank you very much

[naveed suhail]

thank you

[Aadil Salam]

thank you very very much

[Yasser Abdelhadi Zerouala]

Thank you so much you are the best

[syed Khawar Shah]

Thank you very much. You are a life saver

[Ram Kumar Karode]

Thank you You saved my time

[Felix Kibooli]

Thank you. It did work

[Marlon Callacando Guaña]

Hola, quiero refrescar las señales del powergui como hago?

porque en el analisisi fft me salen señales que ya borre

ayuda

[Osborne Grässe]

Thank you so much, SACHU SEBASTIAN!

[david ignacio miranda miranda]

thank you you saved my life.

[srikaanth mandarapu]

Thank you very much sir. It really helped me a lot.

[Mustakim]

@Luke Perabo thanks for your solution but didn't worked for me since there was another issue in my Matlab 2020

However my issue was solved as::

Model settings/Data Import Export

then tick the states also select the format as "Structure with time"

you can add this steps in your solution. Thanks

[Kaustubh Kasle]

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]

Hello,

The Scope must be Configured with Structure With Time.

Thank You.

[Shweta]

Thank you it worked.

Answer 1

[Pradipta Kumar Pal]

Reply from Shishir Dwivedi, IN MathWorks Support <[e-mail]>:

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.

[Lei Wang]

yes,you are right,thanks

[Amirali Davoodi]

Yes, it works. Thank you very much Pradipta.

[sovenraj patra]

thanks

[Kristoffer Michea]

Thanks!!

[AHAMMAD FAHAD N]

Thank u very much pradipta sir

[Sanjeev Pareek]

Thanks Pradipta, just to add that the "Data Import/Export" section will be available in "Solver settings".

[MATIAS MEDIANO]

Thank you!!!

[rakan albaz]

This worked! Thank you!

[Leepapula Moche]

Thank you!

[倚天 王]

thank you!!!!!!!!!!

[minghan yuang]

thank you veeery much!!!

[hamid shokohi]

THANK You!

[Radha Garg]

thanks

[Yadvendra Singh Yadav]

Thanks.

[ilhami pyrz]

thanks.

[Yadvendra Singh Yadav]

Thank you.

[INEL Tech Centre]

kindly help to resolve this error. what other settings need to be modified?

[Muzammil Ahmed]

Thank You. It was useful.

Answer 2

[Swarooph]

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.

Answer 3

[Aarti Srivastava]

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.

[jorel owona]

Very important to use the 'structure with time'!

thanks a lot!

[mohammad norshazwan]

Thank you! Very useful and helpful for me. Appreciated it so much!

[ZHIJUN LI]

Thank you. it works!

Answer 4

[V Vaishnavi Kumar]

Observed similar thing. In addition to above steps mentioned, set the solver in block parameters of power gui to discrete and set sample time

[inayat ali]

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

Answer 5

[rajanand patnaik]

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

[rakan albaz]

Reply from Shishir Dwivedi, IN MathWorks Support <[e-mail]>:

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.

[Sukanta Roy]

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]

GUMMADAVELLI AKHIL thanks @rakan albaz

Answer 6

[Ameer Hamza Siddiqui]

yes this methodis not working

[rakan albaz]

Reply from Shishir Dwivedi, IN MathWorks Support <[e-mail]>:

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]

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

Answer 7

[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 ?