Dear All,

I have a basic question about inverse kinematic processing. I previously used V3D software for calculating Inverse Kinematics (mainly joint angles), in this software it was possible to filter the marker trajectories (low pass) before calculating the kinematics, so the final results was smooth enough and there was no need to filter the inverse kinematic results.

Now I am working with Opensim software, so I am not able to filter the trajectories before calculating the inverse kinematics and the results are noisy, I should apply the lowpass filter on the results.

From a biomechanical point of view, does the results differ when i filter trajectories at first, in compare with the situation that the filtering is applied on angle data after calculating inverse kinematics ?

...Any help would be very appreciative.

Farzaneh Yazdani

PhD Candidate, SUMS School of Rehabilitation Sciences

I have a basic question about inverse kinematic processing. I previously used V3D software for calculating Inverse Kinematics (mainly joint angles), in this software it was possible to filter the marker trajectories (low pass) before calculating the kinematics, so the final results was smooth enough and there was no need to filter the inverse kinematic results.

Now I am working with Opensim software, so I am not able to filter the trajectories before calculating the inverse kinematics and the results are noisy, I should apply the lowpass filter on the results.

From a biomechanical point of view, does the results differ when i filter trajectories at first, in compare with the situation that the filtering is applied on angle data after calculating inverse kinematics ?

...Any help would be very appreciative.

Farzaneh Yazdani

PhD Candidate, SUMS School of Rehabilitation Sciences

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