FFT Analysis Tool in Powergui

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Luke Perabo 2016-8-24

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评论： Muzammil Ahmed 2024-1-7

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.

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Kaustubh Kasle 2022-9-7

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 2022-11-15

Hello,

The Scope must be Configured with Structure With Time.

Thank You.

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回答（7 个）

Pradipta Kumar Pal 2019-8-16

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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.

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INEL Tech Centre 2022-4-14

fft_error.png

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

Muzammil Ahmed 2024-1-7

Thank You. It was useful.

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Swarooph 2016-8-24

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编辑：Swarooph 2016-8-24

For the FFT analysis tool to pop up data names, you need to satisfy 2 things:

You should have run the simulation
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.

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Aarti Srivastava 2018-4-17

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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.

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mohammad norshazwan 2021-12-20

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

ZHIJUN LI 2022-12-4

Thank you. it works!

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V Vaishnavi Kumar 2018-3-8

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image.png

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

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inayat ali 2022-8-22

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 2022-9-13

i have also same problem. i am unable to open in property editor

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rajanand patnaik 2018-10-1

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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

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Sukanta Roy 2022-7-8

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 2022-12-12

GUMMADAVELLI AKHIL thanks @rakan albaz

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Ameer Hamza Siddiqui 2019-5-4

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yes this methodis not working

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rakan albaz 2020-8-1

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.

rajalakshmi D 2021-7-26

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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