Artificial Knee Joints Actuators with Energy Recovery Capabilities: A Comparison of Performance

Figure 3

Efficiency maps of the IVT (a) and of the HD gear (b) obtained through detailed efficiency models which distinguish the performance of the transmission devices in forward (), revrse (), and irreversible motion conditions. In (a) is given as a function of whereas is given as a function both of the output motor speed and of the torque at the output shaft normalized to the Rated Torque (RT) of the HD gear selected.

(a)

(b)