Simulink - Excel

Hello

Does anyone know if it's possible to run an excel file in Simulink? I have a column with a variable in excel, and don´t know if there is a block that I can get in simulink to run this variable.

Regards

Answer 1

[Guy Rouleau]

The Signal Builder block allows you to import a signal directly from Excel:

http://www.mathworks.com/help/simulink/slref/signalbuilder_cmd.html

Answer 2

[Arnaud Miege]

What do you mean "run this variable" and why do you need to do that? Depending on what you want to do, it might easier to just import the data in MATLAB using xlsread and then use the From Workspace block to use the variable in the Simulink model.

HTH,

Arnaud

[Pat]

i have a variable b which consists of values [ 2 3 4].if i enter b to pass these values to fuzzy logic controller as input i get an error.can any one help

the error is 'expression b does not evaluate to valid FIS'

[Sajjad Khan]

I have been facing the same problem. Could some one explain it?

Answer 3

[Tiago]

Thanks to booth for your replay.

I import to workspace. I see the block Arnaud said.

Now... What I put in data in block parameters?

[Arnaud Miege]

Read the documentation. It depends on the format of your data in the workspace, but typically something like [time_vec data_vec], where time_vec is the name of your time vector and data_vec is the name of the your data vector. Both vectors need to be the same size, and need to be column vectors (Nx1).

[Tiago]

well... I try but can´t make that work.

Anyone have any example or tutorial to I see how this work?

[Arnaud Miege]

It's not particularly difficult. What's your data like? Can you copy and paste the output of whos at the command line? What error message are you getting?

[Tiago]

I will try explain step by step to you understand me and my error.

I have two columns in excel: Time and Values

Import the file to workspace. Stand now with two files: data and textdata.

Next what I need to do?

[Gia]

Hi Tiago,

The variable data should contains all numerical values of your excel file -- a time column and a data column.

You can create a look up table using time as x-axis. Feed the clock as input.

[Tiago]

yes, I have in file data per example 22x2. 2 columns with 22 values.

My question is how make simulink run that.

Using the "simin" right?

[Arnaud Miege]

Assuming your time values are in the first column, you just need to enter data in the block (if data is the name of your variable).

[Tiago]

not understand..

In simulink I put per example:

simin x constant = simout ??

[Arnaud Miege]

Instead of simin, just enter the name of your variable, i.e. 'data' in your case (without the quotes) and that's all there is to it!!

Answer 4

[Tiago]

Thanks all for your help. I´m a noob in Simulink, it´s my first contact with this software, I need to go step by step if not I get lost.

In Simulink I put per example simin x constant = simout, is right that part?

[Arnaud Miege]

Why do you want to do simin x constant? What are you trying to achieve? You may want to look at the Simulink tutorials at:

http://www.mathworks.co.uk/academia/student_center/tutorials/simulink-launchpad.html

and also read the documentation.

[Tiago]

I don´t now if the correct way is simin x constant. I have one constant and one file in excel with one variable with time. And want multiply this variable by the constant over time.

[Arnaud Miege]

Did you have a look at the tutorials I suggested? You really need to get up to speed with the basics of Simulink. Have a look at the following snapshot:

https://picasaweb.google.com/lh/photo/e5izz3VrVIYHyZnnq3oc6A?feat=directlink

Answer 5

[Tiago]

Need help please ^^

Answer 6

[Tiago]

Hello

Sorry don´t say more nothing but I was out of office in last days. In this moment I still don´t know how to solve this problem.

I understand for you guys it is very simple, but for me it is a hell :)

For example I have in workspace: Time 1 2 3 4 5 Values 5 8 9 4 2

And need multiplicate this values with a constant

What blocks I need to use to make that operation?

Best Regards

[Arnaud Miege]

Again, have a look at the snapshot I mentioned in my earlier comments, read through the documentation and look at the tutorials I pointed you towards. This is really basic stuff. Failing that, you need to go for a training course:

http://www.mathworks.co.uk/services/training/courses/SLBE_1.html