Dynamic wall constraint with MATLAB

Question

Federico Giannetti 2022-5-25

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回答： Ninad 2024-1-21

Hello to everyone,

I'm developing a script to analyze the motion of a quadratic object inside a box, that is pushed out with a spring. At the contact between the walls and the object, I apply the wall reactions.

If the wall reaction is strong, the object bounces and the model works, but if the wall reaction is weak, the object crosses the wall and the model fails, as in figure:

How can i bind the object on the wall in case of contact? In this way, even if the reaction is weak, the object doesn't cross the wall and the model should work.

Thanks to everyone.

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Answer 1

Ninad 2024-1-21

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Hi Federico,

As per my understanding, you are developing a script to analyze the motion of a quadratic object inside a box, that is pushed out with a spring. If the wall reaction is strong, the object bounces, otherwise it breaks the wall and the model fails.

In the Simulink Library browser go to Simscape > Multibody. Model the bodies of an articulated mechanical assembly. Refer the following documentation to understand how to select the correct blocks and tweak their physical bodies for your requirement:

https://in.mathworks.com/help/sm/bodies.html

You can refer the following article to model the contact forces between two solids:

https://in.mathworks.com/help/sm/ug/modeling-contact-force-between-two-solids.html

Hope this helps.

Regards

Ninad