Design and Fabrication of a Robotic Knee-Type Prosthetic Leg with a Two-Way Hydraulic Cylinder

This paper presents a prosthetic leg using a two-way hydraulic cylinder. Depending on the walking pattern of people and the walking environment required, it is necessary to adjust the prosthetic leg according to the conditions. The two-way hydraulic cylinder can adjust the tension and compression force separately, and therefore it can be fine-tuned according to the walking conditions. The two-way hydraulic cylinder is actively controlled through the stepping motor so that the human with the developed prosthetic leg can walk similar to a temporarily able-bodied person.