Dear Community,
As I am trying to get the frequency response of DC/DC converter,exactly the control to error transfer function Vout(s)/Verr(s) (Verror=Vref-Vout). after launching the analysis I get this error message as shown in the image attached.
best regards,
It didn’t find a steady state. This means your system takes too long to get to the steady state from simulation start.
A simple fix would be to switch to “Stored system state” in the Initialization tab of the simulation preferences. You must store a state where the system is in steady state. For example after a normal simulation.
Another possibility is to set the number of init cycles in the Analysis Tools dialog.
I strongly advise using the “Help” button in the Analysis Tools to get to the documentation. There you find:
[…]Number of init. cyclesThe number of cycle-by-cycle simulations to be performed before the Newton iterations are started. When an analysis fails to converge because the starting point was too far from the steady-state solution, this parameter can help to get better starting conditions. The default is 0. […]
Cheers
Falk
Thanks Falk for the hint. I have solved this problem by giving a number 25 for the number of iterations but I am bit confused whether it will impact my result or has no impact.
I have also got another issue after this my body shows only half of the frequencies, not the whole frequencies as you can see in the image.
just a detail, I have placed my perturbation between the PI controller and the subtraction block
