I am using a sample project 'paf-anybody-example-main' with qualisys motion capture systems and anybody.
We were able to load data from qualisys where we have a modelled lower limb, placing markers only on the pelvis and lower limbs.
During the simulation, the movement of the pelvis and lower limbs appears to be correct based on the trajectory of the markers.
Unfortunately, we can't turn off the upper body (head and trunk), which deforms during the simulation - it moves inertly.
Will the inclusion of the upper body affect the simulation results?
How can we solve this problem? How can we switch off the upper body?
Katarzyna Nowakowska-Lipiec
Silesian University of Technology, Poland
The trunk and head are always included in the model. There is no easy way to switch them off.
Firstly, if you have forceplate data, then having the trunk and head would make no difference to the lower extremity result as you would have the ground reaction force from the force plate on the foot and the residuals on the pelvis.
To ensure you have somewhat sensible visualization of the model, you could add extra weak mannequin drivers in the file ExtraDrivers.any, which you can access through LabSpecificData.any, to ensure that the trunk and the head are kept in neutral position (or another angle of your choice). You can add the following lines, for example:
#define BM_MANNEQUIN_DRIVER_NECK ON
#define BM_MANNEQUIN_DRIVER_PELVIS_THORAX_LATERAL_BENDING ON
#define BM_MANNEQUIN_DRIVER_PELVIS_THORAX_ROTATION ON
#define BM_MANNEQUIN_DRIVER_PELVIS_THORAX_EXTENSION ON
