Can I link optimization code with Simulink file?

I want to link my m.file with simulink file to cut the complex equations and codes.

I just want to know, Can I define my specific parameter as variables and link the file with smulink?

cost =zeros(size(popmatrix,1),1);
for ii= 1:size(popmatrix)

P=popmatrix(ii,2);
I=popmatrix(ii,1);

LowerBand = [-400 -400];
UpperBand = [400 400];
Xls=.19; 
Rs=.003; 
Xd=1.8; 
Rfd=.000929; 
..

sim('PMSM')

Answer 1

[Fangjun Jiang]

In the most common case, you run the code above, all the variables will be created in the base workspace. If your Simulink model PMSM uses any of these variables in its block diagram, then, Yes, the Simulink model will use the updated variable value for its simulation. In your word, they are "linked".

[Morteza Moslehi]

Dear Fangjun Jiang

Thank you to reply me. yes, at first it does, but after changing them I encounter with this code:

Error using My_Model_P

Error evaluating parameter 'P' in 'MyModel/PID Controller'

Caused by:

Error using My_Model_P

Unrecognized function or variable 'P'. - Show complete stack trace

Error using My_Model_P

Variable 'P' has been deleted from base workspace.

Suggested Actions:

• Undo the deletion. - Fix

• Load a file into base workspace. - Fix

• Create a new variable. - Fix

- Show complete stack trace

[Fangjun Jiang]

You might have command like "clear" somewhere else that clears the variable. For this error, go to MATLAB Command Window and type "P", you should be able to verify whether variable "P" exists or not in base workspace.

[Morteza Moslehi]

I define the workspace from here. When I define workspace I will encounter with not enough input arguments. Is there another way to define my workspace?

[Fangjun Jiang]

Is your code a function? For this error, go to MATLAB Command Window, Type Kc or E if there are values. If not, that is the problem.

[Morteza Moslehi]

yes, at first, i give them measure and run. it works correctly.

but when I put them in the function of Optimization and run, it gives me error. I defined the file in the model workspace part, and reinitialize from source, it gives me again the error of Not enough input arguments.

is it possible to send you my code here or email for you to check it ?

[Fangjun Jiang]

"I defined the file in the model workspace part". It seems that a few things are not clear to you.

base workspace, model workspace, function workspace

If your code is inside a function, all variables are in function workspace. They are not accessible in base workspace and model workspace.

Most common case is to use base workspace. I assume you don't know what is model workspace from your statement above.

The simple solution is for you to create those variables in the base workspace and the problem will be resolved.

[Morteza Moslehi]

Would you please give me a link to read or watch that? or would you please give me an example to find out that?

[Fangjun Jiang]

Search those terms in doc

[Morteza Moslehi]

function workspace is in the model explorer?

[Morteza Moslehi]

I think, I found out that. I have to go under mask of PID block. But I go there but I really can't find specific part to upload my cost function file.

[Fangjun Jiang]

No need to touch the mask of the PID controller. You will be confused by yet another term: mask workspace.

Design your cost function as

function [Kc, E]=MyFun(x,y,z)
%some code here
end

And then run this in Command Window and you will get Kc and E in base workspace

[Kc, E]=MyFun(x,y,z)

[Morteza Moslehi]

@Fangjun Jiang thank you so much to give your time to fix my code.

But, my problem was in the simulink, I had to put Fobj for controlling. Thank you so much for your kind again.

Answer 2

[Morteza Moslehi]

Can I do it by Matlab?

function cost = Curve_Pth_Pattern1_P_I(popmatrix)

global LowerBand UpperBand
for ii = 1:length(LowerBand)
 popmatrix(:,ii) = LowerBand(ii)+(UpperBand(ii)-LowerBand(ii))*popmatrix(:,ii);
end
% change the bounds of x from 0<=x<=1 to a<=x<=b
cost =zeros(size(popmatrix,1),1);
for ii= 1:size(popmatrix)

P=popmatrix(ii,2);
I=popmatrix(ii,1);

LowerBand = [1 1];
UpperBand = [4 10];
%equations
sim('PMSM')
end

[Morteza Moslehi]

FIrst, We have to descibe a block as objective function to model and make a circle in the simulink and after that define m.files for parameters as workspace. it is completely okay.

[Fangjun Jiang]

"descibe a block as objective function", "make a circle in the simulink"

I am sorry I couldn't understand these. Now I think I didn't understand your question at all.