Forward Kinematics

Provide easy-to-use, extensible software for modeling, simulating, controlling, and analyzing the neuromusculoskeletal system.
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Ali Forouzanfar
Posts: 24
Joined: Thu Dec 15, 2022 11:21 pm

Forward Kinematics

Post by Ali Forouzanfar » Thu May 23, 2024 8:30 am

Hi everyone,

I have a set of absolute segment angles obtained from IMU sensors, and I need to compute the marker locations using forward kinematics (FK). Could anyone guide me on how to achieve this? Is there a specific function in OpenSim that can be used for this purpose?

Any detailed instructions or examples would be greatly appreciated.

Thank you!

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Thomas Uchida
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Joined: Wed May 16, 2012 11:40 am

Re: Forward Kinematics

Post by Thomas Uchida » Sat May 25, 2024 10:55 am

Please take a look at OpenSense (https://simtk.org/projects/opensense). Once you have the kinematics of the model, you could write a script to pose the model, store the location of each marker with respect to ground, and iterate over all time points.

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Ali Forouzanfar
Posts: 24
Joined: Thu Dec 15, 2022 11:21 pm

Re: Forward Kinematics

Post by Ali Forouzanfar » Wed May 29, 2024 12:42 am

Thank you for the suggestion! To help me understand, could you please share some detailed instructions or examples related to my use case?

Also, I'm working on verifying joint angles I obtained through inverse kinematics in OpenSim. I'd like to verify these angles using forward kinematics within OpenSim itself. Specifically, is it possible to input my calculated joint angles and perform forward kinematics to compare the resulting pose with my original data?

If so, could you point me towards the relevant functions or workflows to implement this verification process? Any assistance would be greatly appreciated!

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