Hello everybody,
I am using OpenSim along with some sensors to simulate arm movement. Recently, I have come across a problem.
When I apply an arm flexion to my model (on shoulder joint) manually, the arm rotates about "Z" axis. Now, if I initiate this angle to zero and apply -90 degrees of arm adduction (arm comes up perpendicular to the previous movement) and then again apply the same arm flexion, the arm will still rotate about "Z" axis whereas it is supposed to rotate about "Y" axis (because of -90 degrees adduction rotation).
I believe this is a problem because the other DoF (arm rotation) does not have this problem.
I have also attached two pictures to make the problem more clear.
Any helps will be appreciated.