Systems with two different execution rates

Hello,

I want to simulate 2 models that execute at 2 different rates

System 1 output (at 20 ms) is an input to system 2 (which executes at 10 ms), and system 2 output goes back to system 1 as a feedback signal.

How can this be accomplished in Simulink environment?

Thanks in anvance!

Answer 1

[Walter Roberson]

If what you have is two blocks (or subsystems) both inside the same model, then you could use https://www.mathworks.com/help/simulink/slref/ratetransition.html rate transition block .

I am not familiar enough with Simulink to know all of the conditions under which blocks can end up running at different rates. I know that when you use a Simulink buffer block or a conversion between pixel streams and frames such as convertToFrames that the other side of the block is considered to run at a different rate.

[Samy Alkhayat]

I think this should fulfill the purpose of my application. Thank you!

Answer 2

[Paul]

Hi Samy,

Are you intending to have one model reference the other via a Model block?

If so, and if you have at least R2022a, I suggest you check out this blog post, the comments at the bottom, and the links to the relevant doc pages. If you don't have 2022a, I don't think it can be done (I could be wrong).

[Samy Alkhayat]

Hi Paul,

Thanks for sharing the blog, unfortunately, I don't have this feature in the MATLAB version I have.

Thank you.