Undefined function or method 'pid' for input arguments of type 'double'.
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Hi, I am a beginner and would like to try out matlab for my assignment. I am encountering the error as ' Undefined function or method 'pid' for input arguments of type 'double'.' I can't figure out why. Please help.
clear all
clc
syms s
Gnum =exp(-0.5);
Gden = [7.724 32.317 25.220]; %((s+1)*((s+5)^2));
G=tf(Gnum,Gden);
H = 1;
T = feedback (G,H);
step(T)
hold on
Kp = 26.995;
Ki = 21.067;
Kd = 6.452;
Gc = pid(Kp,Ki,Kd);
Mc = feedback(Gc*G,H);
step = (Mc);
grid on
5 comentarios
Guillaume
el 24 de Nov. de 2014
I'll ask again, what does
which pid
return when you type that at the matlab prompt? That will tell us whether the function is visible to matlab or not.
Respuestas (1)
Arkadiy Turevskiy
el 26 de Nov. de 2014
As you might have already realized, the pid objects were introduced in Control System Toolbox in release 2010b, so you would not be able to use them in 2009a.
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