Update: According to the literature and discussions on the forum, I noticed that scaling is not needed for the new bodies, but I had a drift on the FY and Pelvis Y. To fix this issue, I performed the following steps: 1) I relaxed the weights of marker associating with the pelvis and performed new In...

I tried three different scenarios: 1) scaling the bodies without changing the original subject mass, 2) scaling the bodies with changing the overall subject mass, 3) adding bodies without performing any scale. Results are: - Joint Moment for 1st and 2nd scenarios are very similar, but the second sce...

Dear Dr. Stanev, I have two other questions about the scaling tool confusing me. In order to scale the added body I am performing the following procedure which I am not sure if it is correct or not: 1)I am adding the new body and attaching it with weldjoint to a proper body. 2) for instance, if the ...

Dear Dr. Dimitar Stanev,
Thanks for your reply,
I noticed that my added bodies were not properly scaled, after scaling them, this drift on the residual force has been solved.
Sincerely,
Ali.

Dear Professor Ayman, Thanks for replying, my problem is exactly on those offline interpretations of the data. I am trying to reproduce the result of the paper titled " Simulated Assistive Devices for Loaded Walking" https://simtk.org/projects/assistloadwalk which the gait events are provided for ea...

I am still struggling with it and would be grateful if anyone can help me.
Sincerely,
Ali.

Dear OpenSim Experts, I am trying to reproduce the "Loaded Walking Project'" data, but I have serious difficulty in shifting the simulations' raw data to the proper gait cycle duration. Based on what I noticed from the provided data, the simulation time and gait cycles are different, and they need t...

Dear Opensim experts, I added some bodies to my model lower extremities, and I am trying to perform RRA and CMC using this model with the bodies added to the model. However, I am getting large FY residual force which on average is 22 N, and in peak, it is 50 N. I followed the provided troubleshootin...

Dear Dimitar Sranev,
Thanks for your complete and helpful answer,
Sincerely,
Ali.

Dear Opensim experts, Hi, I am adding a new body to my musculoskeletal model which is a passive element with a predetermined weight, inertia, and geometry. I have some question according to modeling a new body on the musculoskeletal model : 1) First of all, since this body was already designed and a...