Random change of variable in simulink ?

I need to create a curve like this in simulink (random change of variable around a certain value). How can i do it?

Answer 1

[Walter Roberson]

https://www.mathworks.com/help/simulink/slref/uniformrandomnumber.html

Uniform Random Number block, with minimum and maximum properties set.

Or Random Number Block https://www.mathworks.com/help/simulink/slref/randomnumber.html which is normal distribution.

[M. A.hsh]

Thank you for your answer, but this block does not give the same shape in the attached photo

[Walter Roberson]

r = 3;
data = (rand(1,200) - 1/2)/r;
cd = 14.5 + cumsum(data);
plot(cd)

This has a finite probability of increasing or decreasing arbitrarily away from the centre.

Randomness with a "history" but also finite bounds, gets tricky. Do you have a model for the distribution?

[M. A.hsh]

No, i just need to simulate random wind speed profile as in the attached photo in simulink file

[Walter Roberson]

https://journals.ametsoc.org/view/journals/apme/23/8/1520-0450_1984_023_1184_tsmtsa_2_0_co_2.xml

[Walter Roberson]

I saw one place that said Weibell distribution