How can you find the poles of a steady state system using c2d and the sampling frequency ?

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Hi everyone,
I have the steady state model of a system which I want to discretise. I also have the sampling frequency. I have used c2d but I don´t know how I may I identify the poles of the system to assess its stability. Any help would be greatly appreciated.

Answers (1)

Jon
Jon on 13 Oct 2020
Edited: Jon on 13 Oct 2020
Suppose you have a continuous plant model g and you discretize it with the sampling period ts
% discretize
gd = c2d(g,ts)
% find poles
p = pole(gd)
% check stability (poles must be inside of unit circle for discrete system stability)
isStable = all(abs(p) < 0)

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