Stepping Out in Style: Toward an Artificial Leg with a Natural Gait

Humans rarely walk the straight and narrow; something’s always in the way. So Michigan Tech scientists are developing a computer-controlled prosthesis to make it much easier for amputees to turn as they walk.

In cooperation with a Mayo Clinic scientist, researchers at Michigan Tech are taking a giant step toward solving the problem. They are making a bionic foot that could make an amputee’s walk in the park feel, well, like a walk in the park.

The secret lies in the ankle. Mo Rastgaar, an assistant professor of mechanical engineering–engineering mechanics, and PhD student Evandro Ficanha are working on a microprocessor-controlled ankle-foot prosthesis that comes close to achieving the innate range of motion of this highly complex joint.

These computerized artificial legs have pressure-sensitive sensors on the bottom of the foot that detect how the amputee is walking. The sensors instantaneously send signals to a microprocessor, which in turn adjusts the prosthesis to make walking more natural.

For the full story see Michigan Tech News

Published in Tech Today by Marcia Goodrich, magazine editor