Help With for loop with tranfer function and step

2 次查看（过去 30 天）
Davide Cannavacciuolo
评论： Sam Chak 2023-11-20
s=tf('s');
G=1/(s^2+0.4*s+0.1);
K=[1 2 3 4 5 6];
figure
hold on
for i=1:1:length(K)
T=K(i)*G;
step(T)
S=stepinfo(T);
L=S.Peak(T)
end
I have this code but i get the error : "Unable to use a value of type tf as an index."
I want actually to make a vector containg all the values of the peak values and only then plot the peaks with the corresponding value of gain.
Thank you in advance

请先登录，再回答此问题。

采纳的回答

Sam Chak
Sam Chak 2023-11-20
Ran in:
Hi @Davide Cannavacciuolo
You probably want to plot like this:
s = tf('s');
G = 1/(s^2 + 0.4*s + 0.1);
K = [1 2 3 4 5 6];
figure(1)
hold on
for i = 1:length(K)
T = K(i)*G;
step(T)
S = stepinfo(T);
L(i) = S.Peak;
end
grid on
hold off
figure(2)
plot(K, L, '-o'), grid on
xlabel('Gain'), ylabel('Peak')

更多回答（1 个）

Dyuman Joshi
Dyuman Joshi 2023-11-20
编辑：Dyuman Joshi 2023-11-20
Ran in:
There is no field in the struct 'S' with name 'T'. Thus you get the error in the line you defined 'S'.
I suspect that you want to get the 'Peak' value for each system -
s=tf('s');
G=1/(s^2+0.4*s+0.1);
K=[1 2 3 4 5 6];
%Preallocation
L = K.*0;
figure
hold on
for i=1:1:length(K)
T=K(i)*G;
step(T);
S=stepinfo(T);
L(i)=S.Peak;
end
L
L = 1×6
10.7689 21.5379 32.3068 43.0757 53.8447 64.6136

类别

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

产品


版本

R2023b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by