Hello Mr. Uchida,

Thanks for your response. I can drag the model using model offset. However, the RMS error after scaling was too high (around 10) which means the scaling is not appropriate. Is there any other suggestion to resolve this?

Hello, I am working with Vasavada model in OpenSim 3.3. However, I am not able to scale the model as the markers were misplaced after scaling (attached figure). I have used in total of 9 markers. Please note that the model does not contain any mass. Is it a problem for scaling? I really appreciate y...

Is there any tolerable range for scaling and IK?

I really appreciate your suggestion.

I am working with the combination of MASI model and Hyoid model for a neck flexion and extension simulation. I have used ground reaction forces to calculate the joint reaction forces at cervical spine (C1-C7). In addition, I performed Static Optimization to calculate the muscle activity although it ...

I am working with MASI model for a neck flexion and extension simulation. I have used ground reaction forces to calculate the joint reaction forces at cervical spine (C1-C7). However, the calculated joint reaction forces are much higher than the expected values. Please note that, the model has muscl...

Thanks Mr. Ayman. The problem is solved now.

I am preparing force plate data to calculate the joint reaction forces. The digital data shows the forces and COP along X, Y, and Z direction. However, I need ground torques (Mx, My, Mz) to prepare the ground reaction file. Can you please tell me how I can calculate this? I got a free moment from th...

Hello,

I am using OpenSim 4 and Opensim 4.1. I found some old models (Vasavada neck model or MASI moel) that are compatible with opensim 3.3. However, I am unable to open it in Opensim 4.0 or 4.1. What should I do?

How can I download OpenSim 3.3 now?

Hello,

Thanks for your reply. I tried loading the scaled model. It's the same. My original model has all bodies.

If any part is missing after scaling, is it a big issue or it is just visualization?