Step Response of Transfer Function

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Ainars Cernavskis
Ainars Cernavskis 2022-1-20
评论： Rena Berman 2023-11-27
Hello so am trying to plot the step response of this trasnsfer function , but am not really sure how do i need to write it down in den = part , any help would be great thanks. .
t=0:0.01:5;
num = 1;
den = [1 2 17];
sys = tf(num, den);
y = step(sys,t);
plot(t,y*4)
  2 个评论
Sam Chak
Sam Chak 2023-11-23
The original question may be beneficial to people who wish to learn how to plot the step response.

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采纳的回答

Yongjian Feng
Yongjian Feng 2022-1-20
编辑：Yongjian Feng 2022-1-20
Get help by doing:
help tf
Basically, you need to expand the denominator given in image into polynomial of s. Then take the coefficients and put into den. For example, if you expand it into 2*s^2+5*s+10, then den = [2 5 10].
To expand the denominator, you can do it manually or you can use the expand function of matlab.

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