Hi! I have some problems with model scaling too. We are shooting data by Qualisys, the model in QTM looks normal, and there are no problems with the trajectories of markers. But when I load data in OpenSim, the model distorts along with the markers. It happens only on some surveys, I can not underst...

Hi! We have some problems with joint moments calculation. Early we used Visual3d and we have a knee flexion moment value from - 30 to 200 Nm and smooth chart. Now we use OpenSim. After running Inverse Dynamics tool, we have knee_angle_r_moment with values from -200 to +50. And our chart has a lot of...

Thank you for your reply! But I have new error in my next step... CMC fails with this error: " Constructing function set for tracking desired kinematics... No Actuation analysis found in analysis set -- adding one No Kinematics analysis found in analysis set -- adding one Exception: PropertyObjArray...

Hi! I'm using the gait2354 model, I have jumping data from mocap and ground reaction forces from AMTI platforms. After getting results from scaling, ik, id and static optimization, I am trying to use RRA Tool, but the results are strange. My model squats and then fly during model is getting up. What...

Hi! I have a problem - Opensim takes off without explanation most often after I`ve done Forward Dynamics, but sometimes even during a session. What problems may be here and how to correct them? And another question is about RRA. I am trying to use this tool for my model, but OpenSim show me this err...

Hi! Can you just suggest me please, how can I calculate the moment of inertia of each segment in OpenSim?

And can you just suggest me please, how can I calculate the moment of inertia of each segment in OpenSim?

Thank`s you lot for your fast feedback! I have another 2 questions, help me, please... 1) In the file "Joint Reaction Loads" is a value called, for example, "ground_pelvis_on_pelvis_in_ground_px", what is "_p"? 2) We know how to count the Moment by the Force from the platform. But how can I find the...

Hi!
I am beginner researcher in biomechanics. I am just start working with Open Sim.
Could you explaine me please what does muscle activation mean?
And could you give me links on papers about this theme?
Thank you