model of a point in the space

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Davy Marinier 2015-7-30

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评论： Sebastian Castro 2015-7-31

Hello, With Simulink, how can I modelize a point in the space and get back (in outputs of the block), the 3 coordinates, x, y, z of this point. Thanks for answers

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Answer 1

Sebastian Castro 2015-7-30

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编辑：Sebastian Castro 2015-7-30

I would start with good old Newton's 2nd Law: F = m*a

For each coordinate (X, Y, and Z), you can implement this relationship with two Integrator blocks; one that integrates from acceleration to speed, and one right after it which integrates from speed to position.

What you put into the input (the forces, or the "F" part) is up to you.

For reference, I would start by looking at the Bouncing Ball example for a few different ways you can model the 1-D system. Then, you can extend that to 3-D.

- Sebastian

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Davy Marinier 2015-7-30

Thanks a lot one more time ! (please excuse my horrible English) I think I have understood this very interesting study. But it concerns the "z" axis, and, how does it works for the "x" and "y" axis, because in these case, the gravity is not at 90°

Sebastian Castro 2015-7-31

Well, the gravity could be replaced with any other forces... whether they be zero, or components (sine-cosine) of gravity, or anything else. The left side of the first integrator is the sum of all input forces to the system.

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