How to connect a simscape block with add_line?

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Thomas Knapp
Thomas Knapp 2015-1-20
评论： Francisco Williams 2021-1-29
Hey there, I want to connect a PMC port in SimMechanics automatically with a Matlab-Script. Using the 'add-line' command works fine for common simulink-connections, but not for Simscape-ports. For example if I want to connect the block 'World Frame' with 'Rigid Transform' I use
% code
add_line('mysystem','World Frame/1','Rigid Transform/1')
But then I always get the message:
Invalid Simulink object name: World Frame/1
Does anbody know how to connect these ports in a good way?
Thanks in advance, Thomas

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采纳的回答

Steve Miller
Steve Miller 2015-1-21
Hi Thomas,
add_line() works with Simscape ports. You have to refer to the ports differently. Try this command:
add_line('mysystem','World Frame/RConn1','Rigid Transform/LConn1');
There is a submission on the MATLAB Central File Exchange that shows how to use MATLAB to automate the construction of a SimMechanics model. The submission "SimMechanics Model from MATLAB Code" shows how to add blocks and connect them using MATLAB commands. The same commands work for Simscape blocks, too.
http://www.mathworks.com/matlabcentral/fileexchange/45410-simmechanics-model-from-matlab-code
Hope this helps! --Steve
  2 个评论
Francisco Williams
Francisco Williams 2021-1-29
Hi,
I know this is an old question but I can't find a newer thread.
I'm having the same problem with Matlab2020b. Is there a way to query the names of the blocks?
I created a Subsystem (With Simscape multibody blocks inside) and I want to connect it to another block. But I can't manage to get the proper name of the ports.
Thanks in advance
Francisco Williams
Francisco Williams 2021-1-29
Oh I found a workaround for this:
% Select the first subsystem
>>h1 = get_param(gcb,'PortHandles')
struct with fields:
Inport: []
Outport: []
Enable: []
Trigger: []
State: []
LConn: 333.0016
RConn: []
Ifaction: []
Reset: []
% Select the second subsystem
>>h2 = get_param(gcb,'PortHandles')
struct with fields:
Inport: []
Outport: []
Enable: []
Trigger: []
State: []
LConn: 572.0040
RConn: 974.0093
Ifaction: []
Reset: []
% Or instead of entering gcb, enter the path of the subsystem. The first
% subsystem has only 1 output port and the second one 2
% add the connection between blocks with:
add_line(gcs,port_h1.LConn,port_h2.LConn)

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更多回答（1 个）

Thomas Knapp
Thomas Knapp 2015-1-21
Hi Steve,
thank you very much! Now everything works fine :)
Thomas

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