The mean and SD for the unbalanced moment about the handle-fixed
Y axis MY (black bars) and the
magnitude of the net unbalanced moment |M| (white bars) are
shown. The following six moments are analyzed: (1) initial steady-state (IniSS),
(2) the maximum during the aperture opening phase (Max Open), (3) the minimum
during the aperture opening phase (Min Open), (4) the maximum during the
aperture closing phase (Max Close), (5) the minimum during the aperture closing
phase (Min Close), and (6) the final steady-state (FinSS).