Muscle forces as inputs?

[Ryan Frost]

Hello,

I've been playing around with OpenSim for a little bit and I'm wondering if I can use just muscle forces as an input to a tool, and get kinematics as the result. Forward dynamics is the closest to what I'm looking for, however it seems like it needs some sort of neural excitation data as well. I'm looking for a tool that simulates movement just from muscle forces data. Thank you.

[jimmy d]

Hi Ryan,

Muscles are a subset of actuators in OpenSim. All actuators require a control signal, so you could replace the muscles with generic path actuators and set the gain to 1 and input your force as the control signal.

The documentation for path actuators can be found here;
https://simtk.org/api_docs/opensim/api_ ... uator.html

Cheers,
-james