The Automatic Stance-Phase Lock is the novel stance-phase control mechanism employed by the All-Terrain Knee. Gait analysis tools are often limited to controlled environments and cannot directly monitor the ASPL. The objective of this project was to design and test a sensor system to measure ASPL function and to begin to explore the effects of relevant alignment, terrain, and mobility conditions on its performance.
The results of the study indicate that the developed system is sensitive to knee lock position changes, knee extension and flexion, and gait events. Data collected by the system confirms the fundamental relationships between applied moments and knee lock engagement which defines ASPL stance-phase control. Measurable differences in ASPL function allude to its responsiveness to variable gait conditions.
The developed system has the proven potential for use in larger biomechanical and clinical studies to inform All-Terrain Knee design iterations and optimise patient-specific prosthetic alignment and set-up.