Effacer les filtres
Effacer les filtres

Is there any Steady-state error for Step input command?

158 vues (au cours des 30 derniers jours)
Isyraf Izuddin
Isyraf Izuddin le 13 Jan 2021
clear all
clc
syms s;
K=1;
Gnum=(50/3)*K;
Gden=sym2poly((s+5)*(s+(10/3))*(s+1));
G=tf(Gnum,Gden);
Hnum=20;
Hden=sym2poly(s+20);
H=tf(Hnum,Hden);
figure
rlocus(G*H*K);
T=feedback(G*K,H);
figure
step(T)
figure
rlocus(T)

Réponses (1)

Nagasai Bharat
Nagasai Bharat le 19 Jan 2021
Modifié(e) : Nagasai Bharat le 19 Jan 2021
Hi,
From my understanding you are trying to find the Steady state error(SSE) for the step response. Steady state error is the absolute difference between the actual value and the desired value at the steady state i.e assuming the end of the plot in this case. SSE is meaningless for unstable closed loop systems.
Desired value appears to be 0.5 from the plot.
To get the SSE
[y,t] = step(T);
sse = abs(0.5 - y(end));

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