find and set simulink parameters for several blocks

14 views (last 30 days)
I have a simulink model with number of subsystems. For example I have used simpower systems MOSFET in multiple places within my model.
At the moment I use the following code. But limitation is, that the bock paths/Names should be known.
for x=1:4 %debug_14.slx is the file name%
Now what if I have several Mosfet blocks, then it hard to specify the block path individually. I need to set Ron=3 for all Mosfets within my model. How can I programatically search mosfet blocks and set_param.

Answers (4)

Debarati Banerjee
Debarati Banerjee on 17 Oct 2014
Regarding this question:
Find the attached sample model (‘trial_model.mdl’)where there are multiple ‘Gain’ blocks in the top model and also in subsystem. The path and names of all the ‘Gain’ blocks present in the model ‘trial_model’ can be found by the following command:
>>block_name = find_system('trial_model', 'BlockType', 'Gain')
Here block_name will be an n*1 cell array containing the names of all the ‘Gain’ blocks present in the model ‘trial_model.mdl’.
Then you can consider to run the following loop to change the parameters of each of the block. You can refer to the following sample code:
>> n=length(block_name)
for i=1:1:n
set_param(block_name{i,1},'Gain','15') %%Changing ‘Gain’ of all the ‘Gain’ blocks to 15
  1 Comment
Rashmil Dahanayake
Rashmil Dahanayake on 17 Oct 2014
The problem with MOSFET is it comes with sysmpower systems tool box. The block type appears to be a subsystem. Hence what should I specify for the keyword search for 'Blocktype'. Updated mdl file attached with MOSFETs in top level and subsystems.

Sign in to comment.

Rashmil Dahanayake
Rashmil Dahanayake on 17 Oct 2014
Edited: Rashmil Dahanayake on 17 Oct 2014
A temporary way around this. Works only if a Tag is specified under block properties.
cc=find_system('trial_model','Regexp', 'on','Tag', 'mo(.*)');
for x=1:length(cc)
limitation: Once off Tag set up for blocks required

Orion on 17 Oct 2014
Edited: Orion on 17 Oct 2014
try this
MyMosfetBlock = find_system('trial_model','SourceType','Mosfet')
specific property of your Mosfet block
then you use set_param to change the parameter you want.
  1 Comment
Rashmil Dahanayake
Rashmil Dahanayake on 17 Oct 2014
it returns an empty cell array. Which means the search criteria unable to locate mosfets.

Sign in to comment.

Orion on 17 Oct 2014
I tried
MyMosfetBlock = find_system('trial_model','SourceType','Mosfet')
with the mdl you attached, and I got the result
MyMosfetBlock =
i have Matlab 2014a, but this command line should work with every version.
Do you use Libraries, Masks ?

Community Treasure Hunt

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

Start Hunting!

Translated by