Search found 2 matches

by Ward Bartels
Thu Jan 30, 2014 12:09 am
Forum: OpenSim
Topic: Acceleration computation in BodyKinematic
Replies: 6
Views: 2673

Re: Acceleration computation in BodyKinematic

Ah, that explains the accelerations we're getting when running BodyKinematics with only a motion imposed on the model. It's still strange though that the positions and velocities correspond to the loaded motion whereas the accelerations do not. If the accelerations are calculated from F=m*a, I'd exp...
by Ward Bartels
Mon May 21, 2012 8:02 am
Forum: OpenSim
Topic: Acceleration computation in BodyKinematic
Replies: 6
Views: 2673

Re: Acceleration computation in BodyKinematic

I'm facing the same problem with several OpenSim models, as well as the examples included with OpenSim. I'm trying to determine body segment COM accelerations based on a motion file alone (so, no muscle excitations). The results are unrealistic. For example, the vertical acceleration for the pelvis ...