Save an output each simulation

17 次查看（过去 30 天）
Sergio Rueda
Sergio Rueda 2019-7-30
编辑： Sergio Rueda 2019-8-1
Hi, I built a model in simulink, wich is feed with a variable input using this code:
mdl = 'PSDfaulty';
x = [0.8:0.01:0.95];
for i = 1:numel(x)
set_param([mdl '/FrontFault'] , 'Value' , num2str(x(i)));
simout = sim(mdl);
end
and it works perfectly, now I need to save in the workspace the output of the model for each simulation, if possible by modifying the code. Im using a simout block but it only saves the last value, Any advice? Thanks.
  6 个评论
显示 4更早的评论
Walter Roberson
Walter Roberson 2019-7-31
I am not certain but I suspect that you will need 3 outputs from the sim() command and that all of the interesting values are muxed together in the third output. However at the moment I am not sure what datatype that third output would be or how the values would be arranged for it.
Sergio Rueda
Sergio Rueda 2019-7-31
Ah OK I understand. If this can help, the data I am looking for is the acceleration data, I have recorded it manually and it is a double.
Name Size Bytes Class Attributes
acc 6251x1 50008 double
Thanks again.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Fangjun Jiang
Fangjun Jiang 2019-7-31
In your model, you have a "To Workspace" block logging four signals and writing to a workspace variable "simout". Of course, the workspace variable "simout" is going to be over-written in every for-iteration.
In your script, your also specified a return variable "simout" when calling sim(). This is probably a unintended mistake. Not to mention the name conflict (both are called simout but they are logging different contents). simout=sim() can return values but the contents are dependent on the "Data Import/Export" setting in the model Configuration Parameters. You can't use [out1, out2, out3, out4] = sim(mdl) to expect to return those four signals that you want to log.
I suggest the following and you can take a look at one cell of "Loggings"
mdl = 'PSDfaulty';
x = [0.8:0.01:0.95];
for i = 1:numel(x)
set_param([mdl '/FrontFault'] , 'Value' , num2str(x(i)));
sim(mdl);
Loggings{i}=simout; % simout is the variable name specified in the "To Workspace" block
end
  3 个评论
显示 1更早的评论
Fangjun Jiang
Fangjun Jiang 2019-7-31
编辑：Fangjun Jiang 2019-7-31
No. You need to keep the "To Workspace" block but not to return variable in sim() call as indicated in my answer. You got 16 cells because "simout" already exists in workspace but all cells are the same.
To acchieve variable name as acc1, acc2, ... (not recommended), you could add a set_param() line in your for-loop to change the variable name of the "To Workspace" block. Then you just need to run the loop with sim(), no need to copy to annother variable e.g. Loggings.
Sergio Rueda
Sergio Rueda 2019-7-31
编辑：Sergio Rueda 2019-8-1
Sorry, but I checked the cells and are not the same, they have different data, and they are the data I need. Only these are more useful to me by having them in different variables. Thanks for responding, it has been very useful.
Edit: actually just typing Loggins{n,n} I can acces to the info and use it as I need. Thanks for the reply.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Variable Initialization 的更多信息

标签

产品


版本

R2019a

Community Treasure Hunt

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

Start Hunting!

Translated by