使用Simulink进行协同仿真：逐步执行和与外部应用程序交换参数 [英] Co-Simulation with Simulink: stepwise execution and interchange of parameters with external application

问题描述

我必须实现与Simulink和外部应用程序（LS-DYNA）的耦合仿真。领先的模拟在Simulink中完成，我想要实现一个功能块如下：

I have to realise a coupled simulation with Simulink and an external application (LS-DYNA). The leading simulation is done in Simulink, where I want to implement a function block as following:

互动是使用Windows的cmd，所以Simulink块应该做以下：

The interaction is done using the cmd of windows, so the Simulink block should do the following:

function [ x,y ] = ExternalSimlation( u,v )

% open the windows cmd and run the external simulation by passing u and v
[status,cmdout] = system( 'command for executing the external simulation -u -v');

    function [ x,y ] = readcmd( cmdout )
        %algorithm to evaluate the cmd output
    end

    [x,y] = readcmd(cmdout);

end

确切的代码在这里不应该相关。我的问题是，我如何实现接口到simulink模型？我可以只使用一个自定义功能块，使用我上面的代码，它会工作吗？

The exact code should NOT be relevant here. My question is, how can I implement the interface into the simulink model? Can I just use one of the custom function blocks, use my code above, and it will work? But which one, I don't really see the difference.

或者，我的另一个想法是构建类似下面的东西：

OR, my other idea was to build something like the following:

然后使用如下的while循环：

And then use a while-loop like this:

while ... do
[u,v] = sim('model', 'x',x,'y', y, 'some option just to run a single step');
[x,y] = ExternalSimlation( u,v )
[u,v] = sim('model' .... next step ...)

可以逐步执行simulink模拟。我怎么能认识到？ （其余的模拟包含复杂的控制算法，派生和集成）

to execute the simulink simulations step-by-step. How can I realise that? (The rest of the simulation contains complex control algorithms, derivations and integrations)

我没有在编写批处理文件的经验，但这似乎也可能为我。

I don't have experiences in writing batch files, but that seems possible for me as well.

如果你不知道为什么我不只是测试的东西，这是因为我没有外部应用程序可用（我只知道如何输入和输出工作），并且不想浪费时间编写一个替代应用程序，只是为了测试，如果它是不可能的。

If you wonder why I'm not just testing things out, it's because I don't have the external application available (I just know how the in- and output works) and don't want to waste time in coding a substitutional application just for testing, if it's not possible at all.

与simulink耦合模拟的任何提示和经验高度赞赏！
谢谢！

Any hints and experiences in coupled simulations with simulink are highly appreciated! Thank you!

推荐答案

据我所知，将simulink连接到其他应用程序的正确写
S函数。如果外部应用程序有一个C / C ++接口，这也应该是性能最好的解决方案：
http://www.mathworks.de/de/help/simulink/create-cc-s-functions.html

As far as I know the "proper" way to couple simulink to other applications would be to write S-Functions. If the external application has a C/C++ interface this should also by far be the best solution performance-wise: http://www.mathworks.de/de/help/simulink/create-cc-s-functions.html

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