I am using GA to optimize the parameters of the membership functions in my fuzzy system. I create a function for fitness:
function y = gafuzzy(x)
global FISsys
global allData
global realResult
FISsys = readfis('aCAess.fis');
allData = importdata('ab.mat');
realResult = importdata('ad.mat');
FISsys.input(1,1).mf(1,1).params = [x(1) x(2) x(3)];
FISsys.input(1,1).mf(1,2).params = [x(4) x(5) x(6)];
FISsys.input(1,2).mf(1,1).params = [x(7) x(8) x(9)];
FISsys.input(1,2).mf(1,2).params = [x(10) x(11) x(12)];
FISsys.output.mf(1,1).params = [x(13) x(14) x(15)];
FISsys.output.mf(1,2).params = [x(16) x(17) x(18)];
c = evalfis(allData,FISsys);
e=sum(abs(c-realResult));
y = e;
end
And A[15*18] matrix for linear inequalities is :
A = [1,-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
0,1,-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
0,0,0,1,-1,0,0,0,0,0,0,0,0,0,0,0,0,0;
0,0,0,0,1,-1,0,0,0,0,0,0,0,0,0,0,0,0;
0,0,0,0,0,0,1,-1,0,0,0,0,0,0,0,0,0,0;
0,0,0,0,0,0,0,1,-1,0,0,0,0,0,0,0,0,0;
0,0,0,0,0,0,0,0,0,1,-1,0,0,0,0,0,0,0;
0,0,0,0,0,0,0,0,0,0,1,-1,0,0,0,0,0,0;
0,0,0,0,0,0,0,0,0,0,0,0,1,-1,0,0,0,0;
0,0,0,0,0,0,0,0,0,0,0,0,0,1,-1,0,0,0;
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,-1,0;
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,-1;
0,1,0,0,-1,0,0,0,0,0,0,0,0,0,0,0,0,0;
0,0,0,0,0,0,0,1,0,0,-1,0,0,0,0,0,0,0;
0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,-1,0]
and b[15*1] vector is:
b = [0;0;0;0;0;0;0;0;0;0;0;0;0;0;0]
but when I run GA, I get this error: Illegal parameters in fisTriangleMf() --> a > b
why?
Yes, it is MATLAB code, the "gafuzzy(x)" is the fitness function.
The problem is in your linear inequalities matrix. Have you tried inverting the signs of your A matrix ?
did you find the solution yet? i am having exactly the same problem, the ga starts optimizing and after a number of iterations usually less than 10, the error pops out!!
when i tryed instead of inequalities to define upper and lowes bounds the ga found a solution, but only for a finite number of unknown parametes.. please share your experience
@Anissa_Selmani
yes, but I'm so busy. please contact me by omidmac [at] gmail [dot] com
Hi. I'm trying to implement a fuzzy controller (FLC), optimized by GA. I was analyzing your code, just for my understanding, what does the alldata matrix mean? And realresult? Is it the ideal and the real response?
Has your system been optimized? Did it work?
Many thanks, sorry for any inconvenience.
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