清空筛选条件
清空筛选条件

SIMULINK - Solving Differential Equations

3 次查看（过去 30 天）
JOKY JOKE
JOKY JOKE 2011-10-18
Hi,
1. is it possible to solve an IMPLICIT ordinary differential equation ODE in SIMULINK. If yes, do you have an implemented example? Which solvers can be used? If it is possible, is it normal that a message appears saying that an algebraic loop exists? Am I right, that an explicit/implicit solver has nothing to do with an explicit/implicit ODE?
2. is it possible to solve a DAE system in SIMULINK?
Thank you
  2 个评论
JOKY JOKE
JOKY JOKE 2011-10-19
F(x1, x2, x3, .... xn, y, y') = 0
with x being defined by functions, which partly are also not explicit, for example:
x1 = f(x2, xn)
0 = F(x2, x4, xn)
x3 = f(x2, xn)
...

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Walter Roberson
Walter Roberson 2011-10-19
I do not know about Simulink directly; you could call a MATLAB function if you needed to. See
<http://www.mathworks.com/support/solutions/en/data/1-15S5M/index.html?product=ML&solution=1-15S5M>
  1 个评论
JOKY JOKE
JOKY JOKE 2011-10-19
Yes, there should be a way in MATLAB. However, I have to implement it in SIMULINK directly. So MATLAB probably won't help.

请先登录，再进行评论。

Fangjun Jiang
Fangjun Jiang 2011-10-19
Since you didn't provide an explicit example, it's hard to say. Maybe this post will give you a little bit of ideas.
http://www.mathworks.com/matlabcentral/answers/18742-how-to-solve-ode-with-simulink
The point is, find all the x', x'', y, y'' etc. in the equation, feed it to an Integrator block, the output will become x, x', y, y' respectively. Use other blocks such as Sum, Product, Gain, Constant to construct the equation. Set up proper initial values for those Integrator blocks. Then you can run simulations to see the dynamic response of every signal.
The solution is only to be numerical.

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

Community Treasure Hunt

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

Start Hunting!

Translated by