How to reproduce this signal ?

[Henrik_Volkers]

here is a vi to play with:

it will create a pseudo random noise with reduced bandwidth

[Geoff54]

Can you give me a version of your VI for labview 2011 please ? I'm going to watch your VI 

[Henrik_Volkers]

here we go

[Geoff54]

thank you ! but i want to define the sampling rate frequency of this loop or cut this signal at low and high frequency :

I generate a PSeudo random noise with this VI but i don't arrive to determine the frequency range can you help me?

i let you the VI below

[Geoff54]

Have you executed my Project to see my problems ? 

[Henrik_Volkers]

No, I have to my own work 😉

My vi give you one way to create a pseudo random noise (PRN) with the frequencies and amplitude YOU want.

By defining the periode(length) of the PRN and the samplerate of the generator all possible frequencies are fixed. Define an amplitude and a random phase for each frequency, add them up , normalize, and you have the spectrum you want. 🙂  (Well, at the numerical representation for the generator, now read my earlier post about the nonlinearities 😉 )

[Geoff54]

I modified my program by integrating waveforms for analog inputs and outputs to manage my concept of time. Look at this : 

firstly i define my profile :

after i generate the response :

and now look at the evolution of the drive control : 

For the moment i don't arrive to cut my frequency. In fact, my signal have to be in the range : 10-200 Hz but for the moment this is not my mainly problem i think . Can you explain why my enslavement doesn't work ?

Look at my vi :

to summarize, I have two problems:
- The frequency range
- Enslavement (probably because of my sampling)
But I did manage to correct these issues