Hi We have walking data with two force plates. After running an RRA, I found that the model is sinking a little bit into the ground, and I would guess this is related to the external force missing. While the right leg is stepping (heel-contact) onto the 1st force plate, the left leg is still on the ...

Hi I am trying to convert experimental c3d data (from Qualisys) into OpenSim compatible files using c3d2opensim https://simtk.org/projects/c3d2opensim_btk When I load the c3d file, it displays the path and file name, but when I run animation (to view the extracted c3d data), an error dialog appears ...

Thanks for your response. We have used forward dynamics using the CMC results as input data (cmc_states.sto and cmc_controls.xml). We have modified muscle property (e.g. reduced optimal force) and run the forward dynamics to see if the center of mass is changed. However, the model looks very unstabl...

Thanks for your response Carmichael. We have modified the muscle property of the hip abductors in opensim and to see if the whole-body CoM is changed. However, we found that it's not changed at all. It looks like the OpenSim model locates a optimal position of the CoM even one of the muscle is signi...

Thanks, one more question.
Are we also able to export 3d markers trajectories from the opensim?

Hi Is there anyway we can export whole-body CoM trajectories data (e.g CoM velocity and acceleration at every time frame) during dynamic movement from OpenSim? For instance, after simulating our model, we want to see if there is any change of CoM afterward. Any advice would be greatly appreciated. T...