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dreamjie618

新虫 (初入文坛)

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虫号: 4431298
注册: 2016-02-24

[求助] 基于Wilson理论的风力机叶片设计已有2人参与

各位大神，下边是基于Wilson理论编写的风力机叶片设计程序，分别是主函数，目标函数和约束函数，但是调试有问题，运行出错，恳请各位大神帮忙看下原因，不胜感激！
报错显示如下
“错误使用 barrier (line 22)
Objective function is undefined at initial point. Fmincon cannot continue.

出错 fmincon (line 799)
[X,FVAL,EXITFLAG,OUTPUT,LAMBDA,GRAD,HESSIAN] = barrier(funfcn,X,A,B,Aeq,Beq,l,u,confcn,options.HessFcn,
...

出错 Wilson (line 19)
[x,fval]=fmincon(@objfun,x0,[],[],[],[],[],[],@confun);”

Wilson.m
clear;
global r;
global R;
global phi;
global lamb;
V1=61.1;P=20000;lamb0=7;Cp=0.4;eta1=0.95;eta2=0.92;B=2;
Mu=17.9*10^-6;Cl=0.8361;Cd=0.0171;
D=sqrt(P/0.49/V1^3/Cp/eta1/eta2);
%D=round(D);
d=roundn(D,2);
R=d/2;
N=60*lamb0*V1/pi/d;
omiga=V1*lamb0/R;
fid=fopen('Wilson.txt','w');
for i=0.072:0.072:0.72
r=i;a=0;b=0;
lamb=lamb0*r/R;phi=atan((1-a)*V1/(1+b)/omiga/r);
x0=[lamb0^2/2000+0.027*lamb0-0.038;10/lamb0/exp(12*r/R)];
[x,fval]=fmincon(@objfun,x0,[],[],[],[],[],[],@confun);
a=x(1);
b=x(2);
fprintf(fid,'%f\t%f\n',a,b);
end
fclose(fid);
p=load('Wilson.txt');
fid=fopen('wilson1.txt','w');
for i=1:10
r=i;
a=p(i,1);
b=p(i,2);
phi=atan(1-a)*V1/(1+b)/omiga/r;
F=2/pi*acos(exp(-B/2*(R-r)/r*sin(phi)));
S=8*pi*a*F*(1-a*F)*sin(phi)*sin(phi)/(1-a)^2/cos(phi);
C=S*r/B/Cl;
Cp=2/lamb0^2*b*(1-a)*F*lamb^4;
fprintf(fid,'%f\t%f\t%f\t%f\n',F,phi,C,Cp);
end
fclose(fid);

objfun.m
function f=objfun(x)
global r;
global R;
global phi;
global lamb;
B=2;lamb0=7;
c=B/2*(R-r)/r/sin(phi);F=2/pi*acos(exp(-c));
f=-8/lamb0^2*x(2)*(1-x(1))*F*lamb^3;

confun.m
function[g,ceq]=confun(x)
global r;
global R;
global phi;
global lamb;
B=2;
c=B/2*(R-r)/r/sin(phi);F=2/pi*acos(exp(-c));
g=[];
ceq=x(1)*(1-x(1)*F)-x(2)*(1+x(2))*lamb^2;

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