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Simulink Plotting problem of function

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Md. Zulfiker Heider
Md. Zulfiker Heider on 27 Dec 2016
Closed: MATLAB Answer Bot on 20 Aug 2021
How can i get the same plot by creating same matlab codes in a MATlab function in Simulink. this is my final equation I=Ipv-Ion(exp((V+IRs)*(q/Ns.K.A.Tk))-1); I have varied V=32.9:-0.1:0 . In normal code output plot(V,I) ok but in Simulink the plot is showing different result. I have use repeted sequence for varing V in Simulink.

Answers (1)

Prateek Khandelwal
Prateek Khandelwal on 2 Jan 2017
If you are getting significantly different results, it probably indicates that the differential equation in question is very stiff and close to being unstable.
Here are some signs that a system is numerically stiff/unstable: - changing the solver/ error tolerance settings in Simulink gives significantly different results - small changes in step size produce different results - system output is very noisy
I Hope This helps.

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