Control systems with different frequencies.

[JanusGowda]

Hello,

I'm new in the forum and also kind of new in the Control systems world.
I'm trying to write the transfer functions of a control system:
------------>G1(z)------------>G2(z)----------->

In the z domain (discrete control). The problem is that G2 works at a different sampling rate than G1. That is, there is two blocks that resample the data.

------------>G1(z)------R1(z)------>G2(z)-----R2(z)------>

G1 works at 10Hz and G2 at 2Hz.
So R1 converts the data from 10 to 2 Hz by means of a zero order hold (MATLAB). And R2 converts from 2Hz to 10Hz with a delay (MATLAB).
How can I write the right transfer function of the system considering this?

Thank you very much!

 

[IRstuff]

I'm unclear why you would convert back to 10Hz after you basically destroyed 80% of your data.

TTFN
faq731-376

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Of course I can. I can do anything. I can do absolutely anything. I'm an expert!
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[JanusGowda]

IRstuff, the reason is that G2(z) needs to operate at that frequency, and then the output of G2 is input for G1 that operates at 10Hz.