Okay , i assume you're already aqcuiring this signal okay. So I'd go to the library browser , under simulink\sinks you will find the "to workspace block". Wire your signal to this block . Change block settings to output a vector. The block stores this vector in the workspace called simout (you can change the name if you want) . Now after you have finished collecting data you can go to the Matlab workspace and say :

  mylast50 =simout((length(simout)-50): length(simout))

thats how i'd roll ... let me know if it works  ..

Go MIZZOU mechanical !!!

thanks for the reply ... but i need to know the last 50 samples inside SIMULINK at each iteration ...  

hmm , i'm afraid i couldn't figure that out , I've played around with it a little but no luck . if push comes to shove you can always contact the mathworks support team .... answers seem to be few and far between in this simulink forum for some reason :(  

I'd take the easy way out and embed some matlab. The reason I say that is that a 50 element FIFO buffer would be an ugly great thing to hand code in simulink, UNLESS your chosen calculation is a built in block, which it might well be.

One tedious option would be a bucket brigade of memory blocks, with a lot of taps.

Yes I'm a bit puzzled by the low volume in this forum, and then again I'm puzzled by the general level of questions, it's almost as though people haven't attempted to learn anything about the program they are using. I am certainly no expert.

  

Cheers

Greg Locock


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