Clear Filters
Clear Filters

Nonlinear plant in simulink

10 views (last 30 days)
Ömer Ergün
Ömer Ergün on 14 Apr 2023
Commented: Walter Roberson on 14 Apr 2023
I need to model a nonlinear equation in simulink as below:
I think I need to use s-function block, in order to do that I need to code that equation as a function in .m file?

Answers (1)

Andy Bartlett
Andy Bartlett on 14 Apr 2023
The key is to model Y(k+1) to Y(k) using a unit delay.
The output of the unit delay is the input value from one time step early.
Input Output
Y(k+1) Y(k)
then just wire-up the math around that.
Ömer Ergün
Ömer Ergün on 14 Apr 2023
Edited: Ömer Ergün on 14 Apr 2023
Thanks for the tip, and where should I wire-up the math equation, in matlab fcn block or in mscript or can I just made a model with fundamental simulink blocks ...?
For example I generated this model, is it true?
(u is the signal comes from PID and the y is the output feedback)
Walter Roberson
Walter Roberson on 14 Apr 2023
There is no point having the 1/z in two different places. You should have it only once and split back the signal after the 1/z
I am not sure that you should be mux'ing the two values; I think you should probably be having the u(i) and 1/z flowing directly into the mathematics block as separate inputs.

Sign in to comment.


Find more on Simulink in Help Center and File Exchange




Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!