MATLAB R2015a multivariable function optimization

3 次查看（过去 30 天）
Bogdan
Bogdan 2016-5-1
评论： Bogdan 2016-5-1
I am trying to minimize an objective function with two variables, using MATLAB R2015a. The objective function is:
function i3 = fob_2(kp,ti)
G_P = tf(0.2,[2 4 1]);
G_TT = tf(0.1,[0.5 1]);
G_TC = tf(kp*[1 1/ti],[1 0]);
G_CV = 50;
G_TA = 0.1;
G_direct = G_TC * G_CV * G_P;
G_loop = feedback (G_direct , G_TT);
G_SYS = G_TA * G_loop;
SP = 1;
[DT,time] = step(SP * G_SYS);
error = SP - DT;
i3 = trapz(time,error.^2);
I tried a few optimization functions, but none of them seem to work. I always get the error message: "**Not enough input arguments.**" at the fifth line of the function, which is
G_TC = tf(kp*[1 1/ti],[1 0]);
I tried the following functions, presented by the used syntax (at this point I don't care much about the starting point. I care more about getting an answer and correctly programming the optimization function):
y=fminimax(fob_2,[1,1])
y=fminsearch(fob_2,[1,1])
y=fminunc(fob_2,[1,1])
I am sure that the function is correctly programmed, because when I try to call it with two parameters, something like:
fob_2(2,5)
MATLAB returns the computed value.
So, the problem is on my end, but I don't see where am I mistaking. Can you help me?
Thank you in advance.

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2016-5-1
编辑：Walter Roberson 2016-5-1
fob_2v = @(kt) fob_2(kt(1), kt(2))
y=fminsearch(fob_2v,[1,1])
  3 个评论
显示 1更早的评论

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Get Started with Optimization Toolbox 的更多信息

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by