Stop Simulink simulation when reached an oscillating steady state amplitude

Hello,

I would like stop a Simulink simulation if a signal reach the steady state in terms of amplitude of oscillations: at the start of the simulation the signal have got a generic transitory, but after some time the system reach the equilibrium and so the system reach steady state like approximativelly a sin(x) function with a constant amplitude.

I would like to compare the heigth relative difference between two near peaks and compare it by a threshold percentage, but I don't know how to do it. If someone have other ideas, please tell me.

Obviously this example is not usefull in this case, because I want to find a steady state of an oscillating system, and NOT a steady state of a signal that reach a target value.

To understand better what I mean, you can see two dinstinct examples (what I want to get is stop the simulation at green line time since signals are are dynamic steady state).

[Jacek Nowak]

up

Answer 1

[Fangjun Jiang]

If you have this toolbox and can use this block, maybe you can look at the rate of change of the magnitude.

Sinusoidal Measurement (PLL)

[Alberto Mora]

Wow, it seems pretty promising... I will try when I have time. Thank you.