In another work, BLEEX is controlled by means of a hybrid controller
[71]. During swing phase, the exoskeleton leg is controlled
by a positive feedback sensitivity amplification force controller.
When the leg enters stance phase, a position controller is enabled,
aiming to decrease the differences between human joint angle and
BLEEX joint angle. The two legs are controlled independently and
the switch between the two controllers is decided according to the
gait states. The successful implementation of the stance-phase position
proportional controller is due to the compliant mechanical
connection mechanism between the pilot and BLEEX.