How do I input a time dependent variable from one function to fsolve function equations?

2021 6 3
1 个回答
回答已采纳
更新时间：2021 6 3
4 次查看（30 天）

0 个投票

function F = A_U_G(x)
a = 2360000000;
b = 1610000000;
c = 700000;
d = 4640000000;
F(1) = x(1) - (u/b) + (b*x(2)); % qAmm
F(2) = x(2) - ((u/c)*(c/(c + d))); % qUrd
F(3) = x(3) - (u/Yd) - (x(1)*t); % qGln
end
Above is the fsolve function
x0 = [0,0,0];
x = fsolve('A_U_G',x0);
qA = x(1);
qU = x(2);
qG = x(3);
Above is the call
Now in the same function where call is made for fsolve function lies variable u, t that changes with time after each iteration.
And I want them to also change their values in function F. So, what changes need to be done?

请先登录，再回答此问题。

 采纳的回答

Walter Roberson
Walter Roberson 2021-6-3
Ran in:

0 个投票

Ran in:
u = randn();
x0 = [0,0,0];
x = fsolve( @(x) A_U_G(x,u), x0);
Unrecognized function or variable 'Yd'.

Error in solution>A_U_G (line 16)
F(3) = x(3) - (u/Yd) - (x(1)*t); % qGln

Error in solution (line 4)
x = fsolve( @(x) A_U_G(x,u), x0);

Error in fsolve (line 260)
fuser = feval(funfcn{3},x,varargin{:});

Caused by:
Failure in initial objective function evaluation. FSOLVE cannot continue.
qA = x(1);
qU = x(2);
qG = x(3);
function F = A_U_G(x, u)
a = 2360000000;
b = 1610000000;
c = 700000;
d = 4640000000;
F(1) = x(1) - (u/b) + (b*x(2)); % qAmm
F(2) = x(2) - ((u/c)*(c/(c + d))); % qUrd
F(3) = x(3) - (u/Yd) - (x(1)*t); % qGln
end

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Nonlinear Dynamics 的更多信息

产品

版本

R2020b

标签

Community Treasure Hunt

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

Start Hunting!

Translated by