how do i plot step response of a system using fourier transform?
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how do i plot step response here?
clc;
clear all;
syms t;
t= 0:0.001:10
G = tf([1], [1 0.9 5]);
[num,den] = tfdata(G);
syms s
G_sym = poly2sym(cell2mat(num),s)/poly2sym(cell2mat(den),s)
Y_four_sym = G_sym/s; % U(s) = 1/s for the unit step
y_time_sym = ifourier(Y_four_sym);
y_n = double(y_time_sym);
subplot(2,1,1)
plot(t,y_time_sym); % i am getting error over.. here tried using ezplot etc
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Birdman
il 3 Apr 2020
Modificato: Birdman
il 3 Apr 2020
If you are dealing with s domain, you need to use ilaplace. Try this:
syms t;
G = tf([1], [1 0.9 5]);
[num,den] = tfdata(G);
syms s
G_sym = poly2sym(cell2mat(num),s)/poly2sym(cell2mat(den),s)
Y_four_sym = G_sym/s; % U(s) = 1/s for the unit step
y_time_sym(t) = ilaplace(Y_four_sym,t);
t=0:0.001:10;
plot(t,y_time_sym(t));
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