This report outlines the need of assistance for a child with dysfunctional knee
joint. We present the design, fabrication and control of knee exoskeleton to enhance
the strength and endurance to impaired knee joint.
When human knee is viewed from a modelling standpoint, the lower limb
motion is essentially a rocking motion. This report documents the details of selection,
synthesis and analysis of the mechanism. In particular, a slider crank mechanism is
selected to imitate the dominant motion of knee joint, extension and flexion.
A CAD model of the knee exoskeleton is developed later which incorporated
the housing for lead screw, DC motor, microcontroller and the motor driver. An
accelerometer is placed on the chest of a child to record the gait cycle.