South Korean researchers develop wearable robot to help paraplegic users walk

A team of researchers at the Korea Advanced Institute of Science and Technology (KAIST) has unveiled a groundbreaking wearable robot designed to help paraplegic users walk, manoeuvre obstacles, and even climb stairs. The lightweight powered exoskeleton, named WalkON Suit F1, is a major advancement in assistive technology for individuals with mobility impairments.

The exoskeleton, which weighs 50 kg (110 lbs) and is made from aluminium and titanium, is powered by 12 electronic motors that replicate the natural movements of human joints during walking. One of the most distinctive features of the device is its ability to approach users, lock onto them, and help them stand up from a seated position, making it particularly useful for individuals in wheelchairs.

Kim Seung-hwan, a paraplegic member of the KAIST team, demonstrated the WalkON Suit F1 in action. He showcased the robot’s ability to walk at speeds of up to 3.2 kph (2 mph), climb a flight of stairs, and take sideways steps, such as when sliding into a bench. Kim expressed the significance of the technology, saying, “It can approach me wherever I am, even when I’m sitting in a wheelchair, and be worn to help me stand up.”

The robot’s design integrates advanced sensors to maintain balance and anticipate the user’s movements. Equipped with sensors in the soles and upper body, the WalkON Suit F1 processes 1,000 signals per second, ensuring stability and fluidity of movement. Lenses on the front of the exoskeleton act as “eyes,” analysing the surroundings, identifying obstacles, and gauging the height of stairs to help compensate for the lack of sensory feedback in individuals with complete paraplegia.

The inspiration for this innovative project came from the film Iron Man, according to Park Jeong-su, another member of the KAIST team. “After watching Iron Man, I thought it would be great if I could help people with a robot in real life,” Park said.

Kim Seung-hwan’s use of the WalkON Suit F1 earned him a gold medal in the exoskeleton category at Cybathlon 2024, an event where developers with varying physical disabilities demonstrated assistive robots across eight categories. Kim shared an emotional sentiment about his achievement, saying, “I wanted to tell my son that I also used to be able to walk. I wanted to share a diverse range of experiences with him.”