why opensim laiulchlrich model is not giving same ik result as its opencap kinematics

[Neha Sahu]

Hello sir, i have use the laiUlchlrich model in opensim and used the scaling file Setup_scaling_RajagopalModified2016_withArms_KA.xml
and used this maker file
RajagopalModified2016_markers_augmenter.xml
uses a scaling tool with neutral.trc file
then with this scale model, have done inverse kinematics for some marker data trc for squat
but I am finding that its not match with the mot file produced by opencap kinematics.
could you tell me why this is happening?

[Antoine Falisse]

It should be close, but you could have differences if for instance you used different time windows of the neutral trial when scaling your model.

[Neha Sahu]

Hello, thank you for reply. Its matching for knee but for pelvic tilt, hip flexion and lumbar flexion its difference is 10' degree . what time range window one should use to get the same value.

[Antoine Falisse]

sorry, but we do not have enough information to help you solve this problem.
You can compare the setups we use in OpenCap with yours https://github.com/stanfordnmbl/opencap ... rms_KA.xml