how do compute muscle excitations by using full body model with dumbbell

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Bojun Huang
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Joined: Tue Dec 04, 2018 7:25 pm

how do compute muscle excitations by using full body model with dumbbell

Post by Bojun Huang » Tue Aug 31, 2021 6:20 am

Hi, OpenSim community,

I would like to study muscle excitations when subjects grab dumbbells from the ground and keep it stable.

Considering the dumbbell will be changed after executing Scale Model, I added the dumbbell model into the model files after executing Scale Model. And the dumbbell is connected to hand_r by WeldJoint. The model file and all configuration files are modified based on the files from https://simtk.org/projects/full_body .

Everything was fine until the RRA was executed, like fig.1.
fig1.png
fig1.png (736.5 KiB) Viewed 177 times
After that, the whole model floated in the air, and the action didn't meet the desired kinematics, like fig.2.
fig2.png
fig2.png (368.23 KiB) Viewed 177 times
Because of the limitation of uploading, the whole project is uploaded to Google Drive https://drive.google.com/file/d/1IWpBkg ... sp=sharing

What might cause this problem, or is there an example like this application? Please someone could show me.
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