Body Kinematics Output

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Ranjan Das
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Joined: Wed Jan 25, 2023 1:54 am

Body Kinematics Output

Post by Ranjan Das » Sun Dec 10, 2023 9:56 pm

I'm trying to get the Centre of Mass position, velocity and acceleration of each body segments, using OpenSim GUI Analyze tool. While using the tool I use the Inverse Kinematics output file with the scaled model of my subject. (both files are attached below). I get the respective plots of position, velocity and acceleration of Centre of Mass of each segment. I have attached the plot file of Pelvis COM. To my surprise the acceleration plots are way high in magnitude. When I used the positional data to verify the velocity and acceleration plots, the velocity profile matches but the acceleration profile is way high in magnitude. What is the cause for this? is it correct.
I have used the default setting of getting all respective values with respect to global frame. It would be of great help in finding out the cause of this. Is there any setting which needs to be tweaked. I would really appreciate any light and help in this matter.

Thanks in Advance.
Ranjan.
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Nicos Haralabidis
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Joined: Tue Aug 16, 2016 1:46 am

Re: Body Kinematics Output

Post by Nicos Haralabidis » Mon Dec 11, 2023 1:16 am

Hey Ranjan,

See the answer to this thread here: viewtopicPhpbb.php?f=91&t=17211&p=0&sta ... 737f58abd5

Thanks,

Nicos

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Ranjan Das
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Joined: Wed Jan 25, 2023 1:54 am

Re: Body Kinematics Output

Post by Ranjan Das » Mon Dec 11, 2023 3:13 pm

Thanks @Nicos Haralabidis.
It clear out the doubt.

Regards,
Ranjan

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