Simulink and simulation of logistic map

Hello, I have assignment to make, a logistic map simulation in simulink using Discrete State Space and Math Function (square), and to be honest I have no idea how to do it. Is tere a way to make Discrete State Space to calculate x(i+1) using square function like x(i)(1-x(i)) not just x(i). My first thought was to use u as x but that is just stupid and it doesn't work. Do you have any suggestions how to solve this ?

Answer 1

[Jonathan Epperl]

So the logistic map is x(n+1)=r*x(n)*(1-x(n)) = r*x(n) -r*x(n)^2. Using the Discrete SS block and a square, how about that decomposition:

x(n+1) = r*x(n) -r*u(n)
y(n) = x(n)
u(n) = y^2(n)

Now x(n) should show the exact same behavior as x(n) in the logistic map.

Answer 2

[Piotr]

Thank you, seams to be working. I feel stupid for not thinking of this. Anyway thanks a lot

[Supratik Das]

hey can you please share me your simulink file for logistic mapping