Hi, I just tested your minimum working example in IPython console (py10, osim4.5.1), and it works. Your motion seems to be a static pose, and I think that's why you set the final time to zero as well. The warnings suggest that the motion file doesn't contain all coordinates. Some people have reporte...

Hi, if I understand correctly, you are asking about whether the pipeline is ok when there is only one force plate.
Yes, that's totally fine, and the outputs of ID, SO, and JR of the leg the GRF has been applied to are still valid.
Hope this helps.

Hi, you can rotate/translate the model through pelvis coordinates (some adjustments in range of motion or unclamping the coordinates might be required): https://opensimconfluence.atlassian.net/wiki/spaces/OpenSim/pages/53089256/Coordinate+Controls+and+Poses#CoordinateControlsandPoses-CoordinateContr...

Hi, it might be out of the scope of this post; you can also get angular momentum through OutputReporter.
An example in GUI can be found here: https://opensimconfluence.atlassian.net ... Simulation

Thanks a lot for the correction. I wonder why there is no corrigendum for that paper.

Hi, the following paper and the MATLAB example might help: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4404026/ https://github.com/opensim-org/opensim-core/blob/main/Bindings/Java/Matlab/examples/plotMuscleFLCurves.m You can also search for MomentArmSolver and the relevant methods in the source cod...

Hi, you might need to add a MocoContactTrackingGoal to your problem. An example can be found in the example2DWalking.

If you have large residuals in ID, then it is unlikely that you will be able to achieve fully smooth controls by tracking the markers and GRFs tightly. Since you are enforcing the residuals to be small, the dynamic inconsistencies have to be made up somewhere. This is indeed a nice justification. I...

Hi Nick, thanks a lot for your response. The residual forces/moments in ID are huge (<380N, <50Nm). However, I don't want the simulated joints moments match the ID output. I just want actuators control to be smooth and natural (without spikes) given that the kinematics and GRF look good. I just foun...

Hi, I'm aiming to run a torque-driven marker + contact tracking simulation with weak [1N(m)] residual and strong [200N(m)] reserve actuators. The simulations converged successfully, and the markers and GRF were tracked well with the max abs residual actuation of 0.01 N(m). However, the actuators con...