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People who have lost a leg have a diminished capacity to complete daily tasks. While prosthetic limbs are not a new field, adjustability of such limbs is proposed to increase the life span of the prosthesis. The increased life span of a prosthetic limb will greatly decrease the cost an amputee has to spend over the years on prosthetics; the need fo...
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Citations
... Another singleaxis manual lock knee was designed in. 10 The manual lock knee is appropriate for weak or unstable patients as well as more active individuals who frequently walk on unstable terrain, and the single-axis mechanism makes the knee relative simplicity and more economical. A biomechatronic knee prosthesis was proposed in. ...
Prosthetic knee joint (PKJ) is an important apparatus for trans-femoral amputees to regain walking ability. This study has two objectives: (1) to design a high performance and low-cost passive PKJ and (2) to evaluate the performance of the PKJ. In the proposed PKJ design, a four-bar linkage was employed as the mechanical structure, and parallel spring and damper were used as the two connecting rods of the four-bar linkage. With the parallel spring, the length of the connecting rod is variable and a buffer flexion angle can be generated, which was consistent with that of the human knee joint. The damper was used to regulate the swing speed of the shank. Through theoretical analysis, modeling, and simulation, key parameters of the mechanical structure were optimized. Finally, experimental studies were conducted to test the performance of the PKJ, including fatigue test and gait analysis. The results showed that the designed PKJ is reliable and the gait of PKJ is close to the healthy subject. Moreover, it is comfortable and showed no adverse effects on the amputee during the walking experiment.
