A BallJoint, a GimbalJoint or any CustomJoint with rotational degrees of freedom will not dislocate. Can you explain what you mean by "implemented a no-dislocation constraint of the glenohumeral joint"? OpenSim can report Joint reaction forces for any joint type so it is generally unnecessary to emp...

The controls computations are performed and then updated every control time window (e.g. 0.001) which is a periodic event. The integrator is variable step and more (e.g. intermediate) steps can be necessary to achieve the desired accuracy.

What are the problems/errors you are getting?

Post the parameters and the values you are trying to apply.

That is good that you have vertical forces. My second comment was referring to the requirement for actuators during SO/CMC for otherwise unactuated DOFs because of small errors introduced by processing the input data. For example, if I drop a block with no forces other than gravity and feed the coor...

4cm of error in the static case is excessive. 9cm during motion could be that the marker data and the model are not correctly expressed in the same reference frame or the model is a poor fit for the task. Is your model physically capable of reaching the marker in question? For example, if your model...

A couple of things: 1. There are no actuators controlling the Y (vertical) direction as far as i can tell from your naming convention. What is preventing the block from falling since you enabled gravity? 2. It is also possible that after filtering and/or splining the coordinates (which SO does), tha...

If your experimental motion is isokinetic then an inverse analysis (including static optimization) or a forward simulation that tracks those kinematics (CMC) will also reflect the isokinetic nature of the task, since these methods depend on the experimental motion. If you wish to perform a forward s...

The SpatialTransform describes a single Transform X = [R(q), p(q)] between the child and parent frames. In forming the translation, p, and rotation, R, the user can specify the spatial "transform axes", and for rotation it defines a successive Body-fixed rotation sequence about these axes in the ord...

Have you tried: given a state from your simulation?