Hi Roger,

I am also using the implicit form of the dynamic solver. I am stuck with it as I am not being able to introduce ground reaction forces as an input to inverseDynamicsSolver for gait2354 model. Can you please post your code or give some clues how you added grfs?

Regards,
Sujash Bhattacharya

Please help!!

Sir/Ma'am, We are trying to use MATLAB-OpenSIM API commands for our code to get the joint moments at each time instant of gait motion. We are using Inverse Dynamics Solver for this. The issues we are facing are, 1. We used states (generalized coordinates and velocity) and generalized acceleration (u...

Hi Ton, I am trying to write my own code in MATLAB to know all the details how Opensim works. I have calculated joint angles using gait2354 model. As I am trying to calculate joint torques using inverse dynamics formulation, all flexion moments are matching well, but there seems to be a problem with...

I am currently doing a static optimization to get the activations in upper limb muscles. CAn anyone suggest me some reliable source or papers from where I can get, how muscle length, fiber length and tendon length changes with elbow flexion angles. How Opensim get those data? Thanks in advance