Inverse Kinematics

[Yuya Miyazaki]

Hello, I am university student.

I would like to create a motion that uses a bicycle.
However, IK does not work, the limbs and body become shaky.
What should I do in such a case?
https://www.youtube.com/watch?v=V4h10GzsSG0
I am using a translator.

[Najoua Assila]

Hi,

You can start by verifying your experimental marker data.
Also, while running your inverse kinematics, you obtain error values at each time frame with the name of the marker with max error between brackets, which should give you an idea why the model is extra-shaky at some time frames.
Finally, you can play with the marker weights to minimize your tracking error.
You should find additional information here: https://simtk-confluence.stanford.edu/d ... leshooting

Regards,

Najoua

[Ayman Habib]

Thanks Najoua,

It appears that some frames are solved correctly while others are not. Some reasons to explain:
1. Model has coordinate bounds that prevents IK solver from matching markers well.
2. Missing or mislabeled Markers for the specific frames where solution fails.

If you preview experimental data and show/hide specific markers that are in question you'll be able to tell which is the case.

Hope this helps,
-Ayman

[Yuya Miyazaki]

Dear Najoua Assila, Ayman Habib.

Thank you for reply.
I have confirmed that this error is caused by the camera losing sight of the marker.
This problem was solved by interpolating the missing markers.

Thank you very much.