I believe the ground-pelvis moments is where the ground reaction forces, from the force plates, are applied since your first parent/child joint needs to be connected to the ground. pelvis_tx_force, pelvis_ty_force, pelvis_tz_force are the forces on the pelvis relative in the x-, y-, and z-directions...

I understand that you can use Inverse Kinematics to run CMC. I was wondering what difference there is between using the Inverse Kinematics and the Inverse Kinematics results from RRA, especially how they can affect the force range. If someone is able to explain, I would greatly appreciate it. Thank ...

You are correct with the coordinates forces as tx, ty, and tz mean that the pelvis translates along those axes. As for the moments, those are only applied to the pelvis. In terms of forces and moments applied to the ground-pelvis joint, those will be defined as Fx, Fy, Fz, Mx, My and Mz. Hope this h...

I'm responding to my own post as I have resolved the issue and am sharing the solution in case anyone else comes across this problem. I added constraints for the lumbar and cervical spines.

Hello all, I am trying to execute RRA on my model. As you can see in the first image, the L3 and L4 vertebras begin deviating. Screenshot (89).png At a certain time step, my model freezes and I notice that the whole lumbar spine clumps together. Which can see in the next image. Screenshot (90).png E...

Thank you, I will take a look at it.

I believe I figured it out. It involved editing the translations in the spatial transform of the L3_L4_IVDjoint

With the current full body/upper body models, I have noticed that the body of the torso usually contains at least the thoracic vertebrae and rib cage. I was wondering if anyone else on here separated them where they become individual joints (ie. T9 joint_x, T9_joint_y, T9_joint_z (rotational/transla...

Thank you for your help. What I have done so far is change the location of the L3 IVD joint so it aligns with the lower extremities. I then ran the IK tool and what happened was the upper body, starting from the L3 IVD joint location going up, translated down towards the sacrum.

Hello all, I scaled a model but it resulted in separating the body in half at the lumbar spine. Screenshot (80).png I have been trying to figure out how to fix this issue but seem to be stuck. I imagine it might have something to do with the IVD joint between L3 and L4, but am not sure if that is th...