Failure in initial objective function evaluation. FSOLVE cannot continue.

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nilesh patel 2018-10-16

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/424341-failure-in-initial-objective-function-evaluation-fsolve-cannot-continue

评论： nilesh patel 2018-10-16

Function File

function [G]=SteadyStateMillFUN(X)
%These are the algebraic equations for solving the steady-state mill
%balance
global S1 S2 S3 DB21 DB31 DB32 DB41 DB42 DB43 F X0 V rho
XF1=X(1);
XP1=X(2);
XP2=X(3);
XP3=X(4);
XP4=X(5);
P=X(6);
R1=X(7);
R2=X(8);
R3=X(9);
R4=X(10);
XF2=0;
XF3=0;
XF4=0;
G=[1-(XF1+XF2+XF3+XF4);
    1-(XP1+XP2+XP3+XP4);
    F*XF1-P*XP1 + R1;
    F*XF2-P*XP2 + R2;
    F*XF3-P*XP3 + R3;
    F*XF4-P*XP4 + R4;
    -S2*XP2+XP1*S1*DB21-R2/rho/V;
    -S3*XP3+XP1*S1*DB31+XP2*S2*DB32-R3/rho/V;
    XP1*S1*DB41+XP2*S2*DB42+XP3*S3*DB43-R4/rho/V;
    R1+R2+R3+R4];
end

CODE TO RUN FUNCTION FILE

clear all;close all;clc
global S1 S2 S3 DB21 DB31 DB32 DB41 DB42 DB43 F X0 V rho
S1=.03;
S2=.02;
S3=.01;
DB21=1/3;
DB31=1/3;
DB32=.5;
DB41=1/3;
DB42=.5;
DB43=1;
V=20;
F=1;
rho=1500;
%tf=200;
%X0=[0.80 0.1 0.1 0];
Xguess=[1, 0, 0, 0, 0, 1, 0, 0, 0, 0];
Xguess=Xguess';
%OPTIONS = odeset('AbsTol',1e-8,'RelTol',1e-8); %Sets tolerences
%[t,X] = ode15s(@MillModelFUN,[0:.03:tf],X0,OPTIONS); %Solves diff e for the milling
[X,FVAL]=fsolve(@SteadyStateMillFUN,Xguess)
FVAL
X
%sprintf('Feed in Bin 1=%8.5f\nProduct in Bin 1=%8.5f\nproduct in Bin 2=%8.5f\nproduct in Bin 3=