清空筛选条件
清空筛选条件

Matlab ODE Solvers - Paramater Question

1 次查看（过去 30 天）
Joe
Joe 2024-5-17
评论： Torsten 2024-5-17
Greetings,
I working with a system of differential equations that model amount of components as a reaction proceeds. I want to pass a variable parameter through one of matlab's ode solvers (probably 45/15). This is in addition to time bounds, so it would be like ode45(function, times, [X1(0),X2(0),...X5(0)],... ). I want to find λ given something like X1(final) = 0.35. How to include this information?
Thank you (:

请先登录，再回答此问题。

回答（2 个）

Walter Roberson
Walter Roberson 2024-5-17
To pass an additional parameter, use http://www.mathworks.com/help/matlab/math/parameterizing-functions.html
However... for the task of finding X1(final) = 0.35 you should be using one of the Boundary Value Problems solvers; https://www.mathworks.com/help/matlab/boundary-value-problems.html
Torsten
Torsten 2024-5-17
移动：Torsten 2024-5-17
You mean
ode45(@(t,y)fun(t,y,lambda),times,[X1(0),X2(0),...X5(0)])
function res = fun(t,y,lambda)
...
end
? But what do you mean by "variable parameter" ? This is a contradiction in itself: A parameter isn't variable.
  2 个评论
Joe
Joe 2024-5-17
Thanks! How I include the extra final condition? Would that go in ode45 line?
Torsten
Torsten 2024-5-17
If you have a final condition for one of the unknown functions, you should use "bvp4c" instead of "ode45".

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Ordinary Differential Equations 的更多信息

标签

产品


版本

R2023b

Community Treasure Hunt

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

Start Hunting!

Translated by