MATLAB: Simulink input output from m file

simulink

Given an input a=[1 2 3] in an m file.

how do I run simulink WITH THE INPUT? Please dont suggest using workspace.

the obvious way to run simulink is sim('model',..) but how do I insert my input? In fact, the depreciated method is exactly what I need..

[T,X,Y] =sim('model',Timespan, Options, UT)

where UT is a matrix of time and input, T, X,Y is output. This is just like a matlab function. If it is depreciated what is the equivalent way to do it? The new sim command has syntax

SimOut = sim('model', Parameters)

is there any way to place my input into parameters?

Thanks!

Best Answer

I suppose you could use the Input parameters to specify inputs with the ExternalInput property. You might also want to set 'SrcWorkspace' to 'current' if you want Simulink to look for those input variables in the calling function's workspace.

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MATLAB: Calling SimMechanics which requires input variables from matlab function

You need to pass in some additional options to the SIM command to make sure that the model reads and writes to the function workspace instead of the base workspace.

options = simset('SrcWorkspace','current', 'DstWorkspace', 'current');
sim('mymodel.mdl', options);

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You can always write MATLAB code that loops through variable values and runs the Simulink model multiple times:

http://www.mathworks.com/help/simulink/ug/using-the-sim-command.html

The best way to do this is to create variables for the two Constant block values. This lets you easily make modifications in your script:

C1 = 1;
C2 = 1;
simOut = sim('model', ... );
C1 = 5;
C2 = -42.675; % why not?
simOut = sim('model', ... );

... and so on.

- Sebastian

Best Answer

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