FFT / Frequency Identification Real-Time compile capability

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Shane
Shane 2011-6-7
Hello Everyone.
I have been using MATLAB for quite some time now but have just started getting into the realtime environment. I essentiall am creating a simulink model that is compiled and used to control our equipment in real time. Know I have designed a conroller but I need to be able have the controller update on the fly but in order to do so I need to be able to pass to it the main frequencys of vibration from the error signal; . My question is wheter FFT block can be used in real time and if not what can i use instead?
Shane
  2 个评论
Kaustubha Govind
Kaustubha Govind 2011-6-7
How are you achieving the interface between your controller model and the hardware? Also, do you use Simulink directly, or are you using either Real-Time Windows Target or xPC Target?
Ivan van der Kroon
Ivan van der Kroon 2011-6-7
An fft always needs an interval to be performed on. You can store (part of) the time signal and do an fft of this signal continuously as the data changes/increases.
You can also get a bandpass filter in the range of the expected frequencies and measure the ac-signal.

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Doug Hull
Doug Hull 2012-9-17
answered in comments

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