Stance Phase Control - Nabtesco NK-6 Symphony Mode D'emploi

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2-3 Stance Phase Control

● p-MRS system (Polycentric-Mechanism of
Stance-Flexion Stiffness Sensing)
The 6-bar linkage detects the floor reaction
force position and controls the stance
phase. The center of rotation of this linkage
system, the sensing point is located around
the toe break. If the floor reaction force is
applied on the heel side from the sensing
point, the knee joint geometrically locks the
knee flexion, and if it is applied on the toe
side from the sensing point, the lock is
released. Since the stance phase is
controlled according to the position of the
floor reaction force, the stance phase
control works reliably at a low heel
contact load and is released smoothly at
the push-off stage. This leads to the user's
relief and smooth shifting to the swing
phase.
Fig. 3 p-MRS System
● Stance-Flexion
The knee joint provides a stance flexion
during from the heel-contact to the mid-
stance. This feature results in absorbing
shocks at the heel-strike and reducing
bobbing of center-of-mass.
The amount of the stance flexion can be
easily adjusted to maximum 10°.
Fig. 4 Stance-Flexion
EN – 8
P.10