Dear OpenSim experts, I am using the Rajagopal's model and I would like to have some info about the patella movement. I understand that the knee_angle_r/l_beta coordinate, which is the coordinate related to the movement of the patella, depends on the knee angle. If you run a IK analysis or you look ...

Hello Thomas, Thank you for your return. I'm interesting in getting the passive moment of the joint in function of the joint angle. For that, for the ankle, I plot the relation between the ankle moment and the ankle angle, after having select all the ankle muscles, and setting the activation overrid...

Dear OpenSim experts, Through my work, I would like to use the Rajagopal's model on OpenSim to compute, for example, muscle-tendon units lengths during movements (gait or stretches). For that purpose, I will have to use joint angles during the movement. We already have a MatLab code which can genera...

Hi Sina,

I am sorry but I did not find any answer to this question.

Finally, I used the project shared by Mohammadreza, to which I added a function to rotate the wrapping surfaces. I can share this function with you, if you wish.

If so, I let you contact me.

Thanks in advance,

Regards

Dear OpenSim experts,

Since I have not get any answer, I take the liberty to re-post :

How do you explain that the active fiber-force of a muscle is not zero, after setting Activation override to 0 ?

Thanks in advance,

Regards

Dear OpenSim experts, I am using the Rajagopal's model and I noticed that when I plot the active fiber-force of a muscle after setting Activation override to 0, I get a non-zero active fiber-force : 241674846_152267227091066_6106137179652424090_n.png How can you explain this observation ? Thanks in ...

Hi John, Thanks for you answer. Indeed, I do use projected marker ont the floor to scale the foot. However, I have already tried to base my scaling procedure direclty on the anatomical markers of the foot, not the projected ones, and it seemed that I still had the same problem. I will give an other ...

Hi, Thank you for your return. Hereinafter you will find a little example to answer to your question. In a subject with equinus only at the left side, the scaling result does not seem correct. That make me think that the scaling procedure is failing : For this subject, we recorded a static calibrati...

Dear OpenSim experts, Dealing with biomechanical data from subjects with cerebral palsy, some of whom present equinus, I have trouble to correctly scale my model for those subjects. Indeed, before any OpenSim workflow (IK, ID, and so on...), I have to scale my model to my subject. However, this proc...

Hi Ross, It seems that you figured out how to solve your problem. Not using Mac 4.2, I would not have been helpful. But, I watched your video and you say that you're using a "modified version of the Rajagopal's model". Thus, I would like to know to what extent you have modified the original model. I...