...
There were several problems with the motion capture data. For the second experiment, one of the LED trackers, used to calculate the wrist joint angle, was covered by another link on the exoskeleton for most of the motion. This caused the data to be invalid for that section of the motion. Another problem was non-consistent x and y axis when we calibrated the PhaseSpace system. This caused the joint angles to be shifted by 90° or 180°.
Figure 1: Two L.E.D. markers are placed at each joint to estimate the true joint location.
Figure 2: Using motion capture to record the positions when shooting a basketball.