Hello,
I have been trying to minimse a function using the genatic algorithms (GA).
When I run the optimizer, it returns strange values.
It'd be very appreciated if someone can help me finding and solving the issue.
Note that the optimal value of V(t) should be either between ( 4 and 5) or (-1 and 0).
** Attached a file that explains the problem.
function z = costfunctiontest(x)
Vt = x;
A = [4/3, -4];
Vmax = 5;
Vhigh = 4;
Vlow = 0;
Vmin = -1;
PiD = 30 ;
PiC = 10 ;
PiP = 50;
ContinuousTime = Vt/A(1);
TotalTime= Vt*((1/A(1))-(1/A(2)));
if ((Vt > Vhigh) & (Vt <= Vmax))
pvt = @(t) abs(Vt-Vhigh);
cost = (PiD + PiC*ContinuousTime + PiP*integral(pvt,0,TotalTime,'ArrayValued',true)) / TotalTime;
elseif ((Vt >= Vlow) & (Vt <= Vhigh))
cost = (PiD + PiC*ContinuousTime)/TotalTime;
else
pvt = @(t) abs(Vlow-Vt);
cost = (PiD + PiC*ContinuousTime + PiP*integral(pvt,0,TotalTime,'ArrayValued',true)) / TotalTime;
end
z=cost;
end
ObjFcn = @costfunctiontest;
nvars = 1;
LB = [-1];
UB = [5];
[x,fval] = ga(ObjFcn,nvars,[],[],[],[],LB,UB)
