How to run Matlab function inside simulink?

Asked by Babak on 30 Oct 2016

Latest activity Answered by Danilo Teran on 4 Dec 2018

68 views (last 30 days)

I have a written code of motor which works very well in Matlab. I need to connect this code to Simulink and for this, I am using Matlab function block inside SIMULINK.

My code has a sub-function. I need to define some parameters for my sub-function but every time I will get an error.

Any idea?!

I wrote this code inside the Matlab function block:

function y = fcn(u)
global B_bank DLarbr_bank DLbrcr_bank DLarcr_bank DLrarc_bank DLrbrc_bank Rr DLSR Ras Rbs Rcs
load('B_bank.mat');load('DLarbr_bank.mat');load('DLarbr_bank');load('DLbrcr_bank.mat');load('DLarcr_bank.mat');load('DLrarc_bank.mat');load('DLrbrc_bank.mat');load('Rr');load('DLSR');
Va=u(1)
Vb=u(2)
Vc=u(3)
t=u(4)
[result]=ode45('Sub_Func',t,zeros(50,1));  % Maine code
y = result;

The error is :

Global declaration not resolved to a Data Store Memory block registered via the Ports and Data Manager.
Function 'MATLAB Function' (#50.115.121), line 4, column 1:"B_bank" Launch diagnostic report.

Thanks for your help.

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2 Answers

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Answer by Walter Roberson on 30 Oct 2016

You need to take extra steps for global data. See https://www.mathworks.com/help/simulink/ug/using-global-data-with-the-matlab-function-block.html

1 Comment

Babak on 1 Nov 2016

Thank you, Walter, for the link. I spent one day to figure it out but still get an error. I made a one minute video about the procedure. I appreciate if you have a look and let me know what is wrong. ( Apologies in advance for trademark) https://www.youtube.com/watch?v=RAnTjvzRdcY

Error is: "Variable 'B_bank' is resolved in the workspace ('base') for block 'test1/MATLAB Function' but it is not a 'Simulink.Signal' object."

Some explanation about my code: I have 9 matrixes with different sizes which I need to make them global.

The function (sys_FINAL) inside the MATLAB Function, calls these matrixes.

Link

Answer by Danilo Teran on 4 Dec 2018

I am sorry how did you resolve this problem. I am having a similar problem and i didn't find a way to solve it.

Thanks in advance

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How to run Matlab function inside simulink?

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