This paper focuses on calculating the central distances of polycentric joints designed to replicate the natural motion of the human knee. A key aspect is the shortening of the central distance during the swing phase, which reduces tripping risk and improves gait stability. Using mathematical modeling, the study analyzes the dynamic changes in instantaneous centers of rotation and their impact on knee biomechanics. The results enable a more precise design of polycentric prosthetic joints, enhancing their functionality and adaptability for users.
Science Journal 