Ankle Torque and Contact Forces
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Natalie Fragnito
- Posts: 5
- Joined: Fri May 15, 2020 6:55 pm
Ankle Torque and Contact Forces
Hello! I am working to calculate the ankle torque for a gait cycle. I am very new with this program. The issue I am facing is that my values in the swing phase are way too high. I believe it is because I am not considering the contact forces in the model and with the floor. How would I go about applying contact forces to a model. Right now I am using the standard 2392 model and normal.mot file given in the beginners tutorial. Thank you for your time.
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Dimitar Stanev
- Posts: 1096
- Joined: Fri Jan 31, 2014 5:14 am
Re: Ankle Torque and Contact Forces
Hi Natalie,
As you correctly pointed out, you must include the forces that are applied on the model by the ground (ground reaction forces -> grf). I am not sure if the tutorial that you are referring is intended for inverse dynamics. In the pipeline example:
https://github.com/opensim-org/opensim- ... 54_Simbody
you can use the subject01_walk1_grf.mot file along with the motion file (subject01_walk1_ik.mot) to perform inverse dynamics. For convenience, the tool setup files (.xml) are also provided.
As you correctly pointed out, you must include the forces that are applied on the model by the ground (ground reaction forces -> grf). I am not sure if the tutorial that you are referring is intended for inverse dynamics. In the pipeline example:
https://github.com/opensim-org/opensim- ... 54_Simbody
you can use the subject01_walk1_grf.mot file along with the motion file (subject01_walk1_ik.mot) to perform inverse dynamics. For convenience, the tool setup files (.xml) are also provided.