Until recently, being paralyzed from the waist down meant using a wheelchair to get around. And although daily life is more accessible to wheelchair users, they still face physical and social limitations. But University of California, Berkeley’s Robotics and Human Engineering Laboratory has been working to change that.
Steven Sanchez, who was paralyzed from the waist down after a BMX accident, wears SuitX’s Phoenix. “If I had this it would change a lot of things,” he says. Photo courtesy of SuitX.
The robotics lab, a team of graduate students led by mechanical engineering professor Homayoon Kazerooni, has been working for more than a decade to create robotic exoskeletons that allow those with limited mobility to walk again.
Recently, a new, lighter and more agile exoskeleton, for which the Kaz lab developed the original technology, was unveiled: The Phoenix, by SuitX, a company that has spun off the robotics lab. Prof. Kazerooni is its founder and CEO.
The Phoenix is lightweight, has two motors at the hips and electrically controlled tension settings that tighten when the wearer is standing and swing freely when they’re walking. Users can control the movement of each leg and walk up to 1.1 miles per hour by pushing buttons integrated into a pair of crutches. The Phoenix exoskeleton powered for up to eight hours by a battery pack worn in a backpack.
“We can’t really fix their disease,” says Prof. Kazerooni. “We can’t fix their injury. But what it would do is postpone the secondary injuries due to sitting. It gives a better quality of life.”
Prof. Kazarooni and his team have developed a series of exoskeletons over the years. Their work in the field began in 2000 with a project funded by the Defense Advanced Research Projects Agency to create a device, now called the Berkeley Lower Extremity Exoskeleton (BLEEX), that could help people carry heavier loads for longer. At that time, Prof. Kazerooni also realized the potential use for exoskeletons in the medical field, particularly as an alternative to wheelchairs.
The Phoenix is one of the lightest and most accessible exoskeletons to become commercially available. It can be adjusted to fit varied weights, heights and leg sizes and can be used for a range of mobility hindrances. And, although far from inexpensive at $40,000, it’s about the half the cost of other exoskeletons that help restore mobility.
Article reprinted from materials provided by the University of California, Berkeley. ##