Reserve Actuators

[Maurice Lang]

hi everyone,

I've a question about reserve actuators;
I've read that they are actuators that can make up for insufficient muscle strength during a simulation,
so I've performed a CMC without them but it falls
then I 've added reserve actuators to the coordinates of the model and it runs
but how I can explain the motive because it's necessary to use them and how I can evaluate the results of reserve actuators?

thanks

Maurice

[Daniel Pina]

The models used in OpenSIM are an approximation of the biological models, and the motion capture used for inverse kinematics carries errors in movement that are revealed in multi-body accelerations that would be nearly impossible for our musculoskeletal system to perform.

The reserve actuators exist to compensate the differences between virtual and real models, as well as the errors in motion capture.

A properly prepared simulation will always carry reserve actuators with values different than zero, but their force/torque values should be low.