Need some help about optimization with matlab and simulink.

Hello, can anybody help me doing optimization work?

<process>

1) Kp, Ki, Kd is variable.

2) Run simulink PID model using that variable.

3) export simulink simulation result to matlab. (a, b, c)

4) find Kp, Ki, Kd that minimizing F=a*b*c

I tried to use fmincon function in optimization tool(matlab), but I couldn't express F as a function of Kp, Ki, Kd.

And also I don't know how to put varying Kp, Ki, Kd in simulink PID control block.

How can I solve this problem? I'd really appreciate it if you could just give me a quick.

Answer 1

[Alan Weiss]

For a relevant example, see lsqnonlin with a Simulink® Model.

Alan Weiss

MATLAB mathematical toolbox documentation