Design and development of the control system for power ankle prosthesis

Phase measurement is a key problem in power ankle control system because the traditional control methods is complex mechanical systems and high complicate computation systems. In this article aims to develop of a straightforward phase measurement control system using two Flexi-Force sensor SR1 and SR2, SR1 installed under the toe and sensor SR2 installed under the heel. Experiment with artificial power ankle model in 2 Km/h walking speed. Accelerometer A1 and A2 are respectively installed to healthy foot and artificial power ankle model, using digital to analog conversion NI-DAQ to record the walking data. Compared the ankle model data with healthy foot walking data. The result can shows it can accurately measure the ankle phase during the walking in real-time.