In some of the simulations(person running) we are conducting we are asking the software for a lower tolerance, i.e. changing the tolerance from 1e-3 to 1e-6. I was able to get the study to converge after making a few changes to the Srel vector around the markers on the foot. However, the results from this show a sharp dip in the GRF force (Fig1), which is different to what was measured in the experiment. Is it possible that asking for a lower tolerance may hamper the simulation instead of improving it?
Another observation was that in some cases, the person appears to penetrate the force plate(Fig 2) and turning the optimization at the foot markers as ON leads to the person floating and a zero GRF in some simulations. Is setting all markers close to the experimental marker using the Srel option not a good idea?
Any advice would be appreciated.
Thanks a lot,