Hypogravity simulation

[Shivangi Giri]

Hello Team,
I wanted to simulate hypogravity using the full-body model by Rajagopal et al. Before going forward with it, I wanted to ask whether I need to change the value of gravitation in the model's .osim file and then implement hypogravity GRF data or just implement the hypogravity GRF data and the RRA will modify the weights of segments accordingly?

Regards,
Shivangi

[Thomas Uchida]

Mass and inertia are properties of rigid bodies, not weight. Gravity affects weight not mass, so it would be more appropriate to adjust the "gravity" property (https://simtk.org/api_docs/opensim/api_ ... 704abb04cd) rather than adjust masses using RRA.