Hi 예빈 임,
I see that you're using the FFT Analysis tool in the Powergui block in Simulink and you encounter an issue where no data is displayed after clicking "Compute FFT". Since there is no specifc error seen in this case, the reason behind this behaviour could be one of the many reasons. Here are some of the things you can do to try troubleshooting this issue:
Ensure that you have a proper setup. Make sure you have run the simulation for a sufficient amount of time to capture steady-state or transient behavior. If the simulation runs successfully without errors and that the signals you want to analyze are connected to the Powergui block. Ensure that you have selected the correct signals for which you want to perform the FFT.
Simulation Settings are set to the required parameters. Check if the simulation time, solver type, and step size are set to desired values. A fixed-step solver with a small enough step size is often recommended for accurate FFT analysis. Also, the sampling frequency should be high enough to capture the dynamics of the signal.
See if the configuration of the PowerGUI Block has the "FFT analysis" option selected and the "Start time" and "End time" to ensure that they correspond to the period over which you are trying to perform the analysis.
Note that, if you have a very large or complex simulation, there is a possibility of you facing issues with your hardware resources. In that case, try running a simpler version of your model.
Hope this helps!
