Hello, I have a model and a motion file I would like to perform Inverse Dynamics on but am having trouble using the Matlab API. I am specifically using OpenSim 3.3. This is the code I've figured out so far, %%%%%%%%%% Inverse Dynamics %%%%%%%%%%% my_model.buildSystem() my_state = my_model.initialize...

Hello, I have a model of the human neck and my lab would like to build a head rest type device and are seeking to understand the forces that such a device would experience. What I am trying to do with OpenSim is create a new joint attached to the back of the skull and ground and then perform an inve...

Hello, In performing inverse dynamics I have two cases. The first is where muscles are enabled and the second is otherwise. The goal is from the HYOID neck model to plot the moments experienced by the joints during a flexion motion, however, I've found that having muscles enabled or disabled made no...

Hello, in the XML .osim model file, in attempting to add a Body to an existing model, I get the error: Attempting to assign an invalid SimTK::MobilizedBodyIndex in Object 'spine_offset' of type PhysicalOffsetFrame. Thrown at PhysicalFrame.cpp:73 in setMobilizedBodyIndex(). The Body I've attempted to...