How to save parameters of masked subsystem to workspace

Hello, I am a simulink leaner. I have one problem needs your suggestion and help. Thank you. In my simulink model A, there are several masked subsytems (a,b,c.. ), in which the parameters are defined ({x1} for a; {x2} for b;...).

The output port "Out1" of model A denotes my object result, but it should be a iterative result. I have to set a loop run for model A based on intial [{x1}, {x2}, {x3}... ]. The "Out1" should be returned to main arithmetical program, and the main program will assign updated {x1'} for masked system a; {x2'} for masked system b;...

I am using the "sim" in the circumstant, and met all these problems. Thank you. I am not sure which commands are supposed to use. Or there is more suitable command? Thank you.

Answer 1

[Fangjun Jiang]

By default, signal on output port "Out1" is logged into workspace as "yout". After every iteration of your sim() run, you can check the value of yout in the workspace. The signal for "Out1" should be the first column of yout. Based on the value, you can use set_param() to change the parameter for your masked subsystem and then repeat the simulation.

[Andreas Goser]

I just see the other question from J T. See my speculation about bas workspace vs. function workspace

[Fangjun Jiang]

You are right. Need to use return variables when calling sim() and whether the .m code is a script or a function.

[J T]

Hi Fangjun, many thanks for your help. I am still wondering if the subsystem is masked, then the workspace for all variables masked within the subsystem is different from the matlabe base workspace.

Here is problem which I met. (1). the values of variables [x] for masked susystem are defined in matlab base workspace, (2).the run the "sim" for simulink, (3). return the {output(from the output port); x} to workspace for further operation (4). the main code computes and give new [x'] for next operation of the simulink. (5). repeat the same process of step (1).

this is a little different from single call sim. The second iteration stuck after (5)

could you give me some suggestion? Again many thanks.

[Kaustubha Govind]

What is the error you receive when you say "The second iteration stuck after (5)"?

[J T]

Hi Kaustubha, Thank you.

The problem has been solved, the type of output was incorreted.