Problem with simscape model

Question

Andrea Ongaro 2019-7-23

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https://ww2.mathworks.cn/matlabcentral/answers/473014-problem-with-simscape-model

关闭： MATLAB Answer Bot 2021-8-20

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?

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Nikhil Sonavane 2019-8-5

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

Andrea Ongaro 2019-8-5

Recovery2.slx

I'am sorry, you are right!

Now it's here!

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Answer 1

Nikhil Sonavane 2019-8-9

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https://ww2.mathworks.cn/matlabcentral/answers/473014-problem-with-simscape-model#answer_386872

ModifiedRecovery2.slx

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.