force-length-velocity surface

[Mohammadhossein Akhavanfar]

Hi All,

I have two questions and appreciate if someone could help me with them.
Based on confluence's documents, for static optimization procedure in OpenSim, we could consider force-length-velocity properties of muscles.
https://simtk-confluence.stanford.edu/d ... tion+Works
It's just been noted in the confluence that f(Fm,lm,vm) is the force-length-velocity surface which is used in the Static Optimization, but my first question is that what is the exact function that OpenSim uses?
My second question is that can we access to the value of this function at each time step by OpenSim API?

Best,

Mohammad

[jimmy d]

There is information on the muscle curves here; https://simtk-confluence.stanford.edu/d ... don+Curves

Static optimization analysis doesn't have in built methods to get the force-length or force-velocity multipliers directly. You would have to write your own API function similar to Static Optimization that sets the current model configuration and asks the muscles for their multipliers (the relevant documentation for muscles is here;https://simtk.org/api_docs/opensim/api_ ... uscle.html)