Force-driven forward dynamics

[pauline pechereau]

Hi everyone,

I'm new to OpenSim and I was wondering if it is possible to prescribe muscle forces instead of muscle excitations as input for a forward dynamics simulation.
Any help would be greatly appreciated.

Kind regards,
Pauline

[Carmichael Ong]

It would likely be very difficult to try to set the exact force using muscles, since they have complicated force-length and velocity relationships, as well as excitation-activation dynamics. To simplify the problem, it may be better to use PathActuator's instead (documentation). Some information about how an OpenSim Model works can be found on its documentation page.