Hi Thomas,

Thank you for your answer.

It works !
Last question : Just for curiosity, how could I have known that I should use setMinimumActivation() before calling initSystem() ?
I have found the information on the OpenSim API page.

Thanks in advance,

Regards

Hi Thomas, Thanks for your answer. I adapt your code for MatLab : import org.opensim.modeling.* model=Model(); muscle=Millard2012EquilibriumMuscle('muscle', 1.0, 0.1, 0.1, 0.0); vec1=osimVec3FromArray([0 0 0]); vec2=osimVec3FromArray([0.2 0 0]); %muscle.addNewPathPoint('p1', model.getGround(), osimV...

Hi Thomas, Thanks for your answer. As you can see in my previous post (the 7th of this topic), I did use setMinimumActivation(). Nevertheless, by comparing with your code, I did not use realizeVelocity (Could you explain to me why you add this line?). So, I added this line too. My code is now : for ...

Hi Thomas, Thanks for your answer. Of course, I read the documentation for the Millard2012EquilibriumMuscle class. But may be, I did not understand it well. The quote you made specify that this condition of a non-zero activation is for "an elastic tendon without fiber damping". Nevertheless in my mo...

Here is the code that I'm using: for i=0:num_muscles-1 MuscMill=Millard2012EquilibriumMuscle.safeDownCast(muscle_set.get(i)); MuscMill.setMinimumActivation(0); MuscMill.setActivation(state,0); MuscMill.getActivation(state); %muscle_set().get(i).setActivation(state,0); %muscle_set().get(i).getActivat...

Hi Ratna, Sorry for reopening this topic, I won't be able to answer to your questions, but I'm facing a problem that it seems you were able to suceed. Indeed, I would like to set the activation of my muscles to 0. As you, I'm using : model.getMuscles().get(i).setActivation(state,0); But, when I'm us...

Hi Thomas,

Thank you for your answer. It works well now, I can obtain the passive fiber elastic force along the tendon.

Nevertheless, I am still not able to set my muscle activation to 0.

Do you have any idea of what I'm doing wrong ?

Thanks in advance,

Regards

Hi, I try to implement the code suggest by Carmichael, using the function from the Muscle parent class, to compute the muscle forces at each time point in the motion by updating the state and setting the muscle activation to 0. Unfortunately my code doesn't work. Below you can find a snippet of it :...

Hi Youngmin Chun,

Sorry for reopening this topic, but I'm also looking for this kind of model.
Have you finally suceed to find a model with 3 DOF for knee joint and the subtalar joint.

Thanks in advance,

Regards

Hi Carmichael, Thank you for your reply. I'm already aware of this page, which indeed can help me. Nevertheless, there is a grey area on how I should operate to get the passive moments. The thing is we compute experimentally by inverse dynamics this passive moments during an ankle mobilization and w...