The control scheme of the BLEEX seeks to minimize the use
of sensory information from the human/exoskeleton
interaction, and instead, utilizes mainly sensory information
from the exoskeleton. Similarly to a bipedal robot,
the exoskeleton can balance on its own, but the human
wearer must provide a forward guiding force to direct the
system during walking. The control system utilizes the
information from eight encoders and sixteen linear accelerometers
to determine angle, angular velocity, and angular
acceleration of each of the eight actuated joints, a foot
switch, and load distribution sensor per foot to determine
ground contact and force distribution between the feet
during double stance, eight single-axis force sensors for
use in force control of each of the actuators, and an inclinometer
to determine the orientation of the backpack
with respect to gravity [18].