WOLFRAM SYSTEM MODELER
RealFFT2Example demonstrating the use of an FFT calculation during simulation (and storing only amplitudes on file) |
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Wolfram Language
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SystemModel["Modelica.Math.FastFourierTransform.Examples.RealFFT2"]
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
This is the same example as Examples.RealFFT1 with the only difference that just the amplitudes of the FFT are stored on file (but not the phases).
Parameters (7)
| f_max |
Value: 4 Type: Frequency (Hz) Description: Maximum frequency of interest |
|---|---|
| f_resolution |
Value: 0.2 Type: Frequency (Hz) Description: Frequency resolution |
| f1 |
Value: 2 Type: Frequency (Hz) Description: Frequency of sine |
| f2 |
Value: 3 Type: Frequency (Hz) Description: Frequency of cosine |
| FFT_resultFileName |
Value: "RealFFT2_resultFFT.mat" Type: String Description: File where FFT will be stored as [f,A,Phi], with f in [Hz] and A the amplitudes and Phi the phases in [rad] |
| nfi |
Value: max(1, min(integer(ceil(f_max / f_resolution)) + 1, nf)) Type: Integer Description: Number of frequency points of the interested frequency range (only up to f_max) |
| fi |
Value: Type: Frequency[nfi] (Hz) Description: FFT frequencies of interested frequency points |
Outputs (2)
| Ai |
Type: Real[nfi] Description: FFT amplitudes of interested frequency points |
|---|---|
| info |
Type: Integer Description: Information flag from FFT computation; = 0: FFT successfully computed |
Revisions
| Date | Description |
|---|---|
| Nov. 29, 2015 | Initial version implemented by Martin R. Kuhn and Martin Otter (DLR Institute of System Dynamics and Control. |