Target and reference model with the same joint configurations

[darios93]

Good afternoon,

In the paper it is specified that reference and target models should have the same joint configuration. What do you mean by '' joint configuration '' ? Is it the joint angles? For example, what if the coordinates differ in terms of range (min and max) ? If it is an issue, what do you suggest in this specific case?

Thank you for your time and help,
Dario

[modenaxe]

Hi Dario,
the key aspect here is that in the mapping process ideally you would like to have the same "normalized" contractile conditions for the same joint configurations. What I mean is that in the reference model you are sampling an existing function f(coordinates) -> normalized contractile parameters, and then in the optimization process you look for the optimal fibre length and tendon slack length that reproduce the value of f as well as possible at the same joint coordinates and for the same muscle but in the new model. In order for the mapping to be meaningful, you have to be sure that the combination of joint coordinates used in the sampling and in the optimization correspond.
I hope this answers the question appropriately.
Luca