pid controller optimisation using fminsearch---pls help me

i hav a transfer function of a model of a conical tank system...i need to optimize the pi controller parameters (kp,ki)by using fminsearch...integral square error and controller effort(U=kp.e(t)+ki(integral(e(t)) are the two objective functions i hav considered that must be minimised to optimise the pi parameters...can anyone pls help me out with a math code to implement the fminsearch algo to optimise pi parameters.THE optimised values that i get in code should produce same output response in simulink..pls pls pls help me out

TRANSFER FUNCTION OF MODEL: 2.828 -------- (0.555s+1) INITIAL VALUES FOR KP,KI: KP=0.7852 KI=1.414

Answer 1

[Guy Rouleau]

Here is what you need:

http://www.mathworks.com/products/simcontrol/

[sri vidya]

can u pls tell me how to optimise the pi controller values using fminsearch..Example: Using lsqnonlin With a Simulink Model...this example uses cost function least square error our cost function is integral square error can u pls help us with the code ...