Bode plot of individual poles and zeros

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Caramel Cookie
Caramel Cookie 2023-11-23
编辑： Chunru 2023-11-23
I need help with one of my homework problems. I am trying to plot the bode plot using the approximation method. Basically I need to use semilogx function to plot each individual pole and zero like in the screenshot attached.
What is the best approach to write this program?

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回答（1 个）

Chunru
Chunru 2023-11-23
编辑：Chunru 2023-11-23
Ran in:
z = 1000;
p = [10 10 100];
k = 200;
bode(zpk(z, p, k), 'k'); hold on
for i=1:length(z)
bode(zpk(z(i), [], 1/z(i)), 'b--') % (s-z(i))/z(i)
end
for i=1:length(p)
bode(zpk([], p(i), p(i)), 'r:') % p(i)/(s-p(i))
end
% You need to use the approximation for each zero and pole to replace the
% bode above. You may consider to write a simple approximation function
% for that purpose.

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