MATLAB Answers

How to send continuous data from simulink block

12 views (last 30 days)
Rahul kumar
Rahul kumar on 17 Aug 2012
Hello,
I have to develop a model in Simulink which can send data continuously, the sent data should be stored in a block and if it reaches some predetermined value. It should trigger the next block.
I increase the value of a constant block by this code..!
for a=1:0.1:10
set_param('MyModelName/Constant','Value',num2str(a)) %send a to the model
pause(1) %pause for 1 second
end
but it is not sending the data continuously, everytime i have to press Run button.
let me know ur idea
Thanks in advance

  9 Comments

Show 6 older comments
Rahul kumar
Rahul kumar on 20 Aug 2012
To explain more clearly..
first i have a constant block which should to send data continuously ( 1 to 10 with interval 0.2)
The next block should take this data continuously and store it.. and if it reaches a threshold value (say 6)..! it should trigger the next block :)
Rahul kumar
Rahul kumar on 20 Aug 2012
yes it is a signal coming out of that conditional block, not data

Sign in to comment.

Answers (3)

Ryan G
Ryan G on 17 Aug 2012
I don't think this code does what you think it does. There is no real-time operations between MATLAB and Simulink, so when you pause for 1 second it could take 1.5 seconds to process the next point in the sim or it could take 100 seconds in the sim depending on how fast it moves.
Try pre-packaging the data with a Time and Data vector and utilizing a To Workspace block or an Inport. For continuity you want to enable interpolation.

  1 Comment

Kaustubha Govind
Kaustubha Govind on 17 Aug 2012
I think Ryan meant to say "From Workspace" instead of "To Workspace" block. :)

Sign in to comment.


Albert Yam
Albert Yam on 17 Aug 2012
Why do you need the 'pause'? If you want an input to 'change over time', use a look-up table, or signal generator.
hm..deja vu

  1 Comment

Albert Yam
Albert Yam on 21 Aug 2012
You still have yet to explain why you need to store the value, and you just reiterated your wording, almost verbatim, so no, not more clear.
clock -> Look-up(n-D) -> Compare to Constant ---> Scope(2)
--------------------------> Scope(1)
Where
Look-up(n-D)
table dimensions = 1
First input (row) = 0:length(a)-1
Table data = a %where in workspace: >> a = 0:0.1:10;
Compare to Constant
Operator = >
Constant value = 5

Sign in to comment.


Rajan
Rajan on 20 Aug 2012
I don't think you can change a value used in constant block ,as the name of the block suggests ,it is a constant value through out the execution.
Don't sent the data from a constant block , instead make a simple addition which increments by 0.2 every time with in the model(not from the code) and send the output of sum block to your data store block . Or compare the output of sum block with comparator block (==6).
I hope this serves your cause.

  1 Comment

Rahul kumar
Rahul kumar on 20 Aug 2012
yes this makes more sense..! i ll try to this ! thank you :)

Sign in to comment.

Tags

Products

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!