how can i write cost function in firefly algorithm for optimal tuning pid parameters in matlab
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Iam using firefly algorithm for optimal tuning pid parameters , the cost function is IAE i wrote IAE function as a function of pid parameters {kp,ki.kd} but it doesnot work it gives error that it undefined variable ,should i give initial values for parameters?? and what is error in the IAE function
costFunction = integral(abs(error),0,Inf);
it gives Undefined function 'abs'
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Respuestas (2)
noor diyana
el 11 de Mayo de 2017
Here are example from my senior project. You can try it. You can change the objective function, MaxIt, runtime as system that you want. Anything can email me diyana.escosa2014@gmail.com All the best!
ednilson szeskoski
el 3 de Sept. de 2017
I have the same problem. I'm implementing PID for a voltage control system. The goal is to optimize using firefly, the same error quoted is happening, how can I implement in the code the transfer function of my case? Thank you.
tf([0.004, 0.454, 5.55, 15.1, 10], [1.6e-05, 0.002032, 0.04732, 0.4286, 2.133, 8.76, 18.01, 11])
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ednilson szeskoski
el 3 de Sept. de 2017
Editada: Walter Roberson
el 3 de Sept. de 2017
The image where the mesh is drawn representing the system is only for understanding my system I work with it in simulink but only by changing the PID values, the image with the equation is the result of the transfer function of the feedback system, in which I am not able to implement in the Diyana code.
Below I have the code that I made simply to get the transfer function. Now the problem is to apply the adapted PID to the firefly optimization code.
%%Malha da excitação
amp = tf([10] , [0.1 1])
exit = tf([1] , [0.4 1])
ger = tf([1] , [1 1])
sens = tf([1], [0.01 1])
h = amp * exit * ger
g = sens
malhaeq = h / (1+h*g)
step(malhaeq)
ednilson szeskoski
el 6 de Sept. de 2017
Editada: Walter Roberson
el 6 de Sept. de 2017
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