Problem with simscape model

Hi everyone,

i'am a beginner with matlab and simulink, and for a thesis project i'am trying to set some simulations to have base results for the successive experimental tests.

In this specific case, i'am trying to simulate a very simple system, the will become more complex in the successive steps: a force source that is emulating a force given by a compression spring, and i have to verify if the spring force is enough to overcome a load, that is given by the other force source. In the middle i have a Loaded-Contact Translational Friction to simulate the load that i given by a torsional spring on my physical system.

When i try to simulate, i have the errors that are showed in the image, and i don't what is the problem. Could be related to a missing degree of freedom between the 2 sources?

[Nikhil Sonavane]

Can you share your Simscape model here so that I can help you debug it.

[Andrea Ongaro]

Should be visible in the attachements! there are 3 images attached to the main question!

[Nikhil Sonavane]

Please share .slx file of your model and not the images.

[Andrea Ongaro]

I'am sorry, you are right!

Now it's here!

Answer 1

[Nikhil Sonavane]

From your model I understand that you have not connected any mass blocks to your Loaded Contact Translational Friction block. Without these mass blocks the Loaded Contact Translational Friction block becomes a mass less system and hence cannot converge. I suggest you add these blocks to your model and try again. I have attached the modified model file.

[Andrea Ongaro]

Thanks a lot for your advice. Can you share the file with the R2018b matlab version? i have some problems in my pc with the R2019a.

[Nikhil Sonavane]

Attaching MATLAB R2018b version of your model. I have checked it for MATLAB R2018b version.