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Prof. Youngsu Cha of the Korea University School of Electrical Engineering Develops 1.3 kg Ultra-Lightweight Wearable Soft Robotic Arm Inspired by “Doctor Octopus”
관리자 2026.04.22 Views 147
▲ Prof. Youngsu Cha’s Research Team Develops Ultra-Lightweight and Highly Flexible Wearable Robotic Arm
Inspired by the villain Doctor Octopus from the film Spider-Man, the concept of an extra arm extending from one’s back is becoming a reality. A research team led by Prof. Youngsu Cha at Korea University has successfully developed a wearable robotic arm that is lightweight, highly flexible, and capable of providing strong assistive force by applying an origami-inspired structure.
Wouldn’t it be convenient to have an extra arm when two hands are not enough? Various attempts have been made to enhance human productivity by mounting robotic arms on the back. However, the weight of conventional systems has remained a major limitation, as most robotic arms are made of metal, placing a significant burden on the wearer. To overcome this challenge, the research team turned to an origami-inspired design known as the “Kresling pattern.” This structure maintains its shape while remaining flexible. Using this pattern, the team created four cylindrical structures and combined them into a single soft robotic module. By incorporating a tendon-driven actuation system, in which wires are pulled to control movement, the team achieved more precise and smooth motion. In particular, the main body is made of lightweight materials such as polyvinyl chloride (PVC), resulting in a total weight of only 1.3 kg despite a length of 77 cm. The robotic arm also demonstrates high flexibility, bending up to 90 degrees. This allows it to be mounted on various parts of the body, such as the shoulders or waist, to assist in tasks like supporting or carrying objects.
In addition to hardware development, the research team established a geometry-based modeling framework that mathematically describes the movement of the robotic arm. Due to the complex motion of origami structures, precise control can be challenging. However, this model enables accurate prediction of how the robotic arm will deform in response to specific commands, significantly improving control accuracy and allowing for highly precise manipulation.
Prof. Youngsu Cha stated, “This robot combines the lightweight characteristics of origami structures with the safety of soft robotics. It has great potential not only for assisting tasks in logistics environments, but also for use as assistive devices for the elderly and people with disabilities in everyday life.”
The results of this research were published in the April issue of the internationally renowned journal IEEE/ASME Transactions on Mechatronics (IF = 7.3, JCR top 4.1%).
Maekyung News link: https://www.mk.co.kr/news/it/12023146
Wouldn’t it be convenient to have an extra arm when two hands are not enough? Various attempts have been made to enhance human productivity by mounting robotic arms on the back. However, the weight of conventional systems has remained a major limitation, as most robotic arms are made of metal, placing a significant burden on the wearer. To overcome this challenge, the research team turned to an origami-inspired design known as the “Kresling pattern.” This structure maintains its shape while remaining flexible. Using this pattern, the team created four cylindrical structures and combined them into a single soft robotic module. By incorporating a tendon-driven actuation system, in which wires are pulled to control movement, the team achieved more precise and smooth motion. In particular, the main body is made of lightweight materials such as polyvinyl chloride (PVC), resulting in a total weight of only 1.3 kg despite a length of 77 cm. The robotic arm also demonstrates high flexibility, bending up to 90 degrees. This allows it to be mounted on various parts of the body, such as the shoulders or waist, to assist in tasks like supporting or carrying objects.
In addition to hardware development, the research team established a geometry-based modeling framework that mathematically describes the movement of the robotic arm. Due to the complex motion of origami structures, precise control can be challenging. However, this model enables accurate prediction of how the robotic arm will deform in response to specific commands, significantly improving control accuracy and allowing for highly precise manipulation.
Prof. Youngsu Cha stated, “This robot combines the lightweight characteristics of origami structures with the safety of soft robotics. It has great potential not only for assisting tasks in logistics environments, but also for use as assistive devices for the elderly and people with disabilities in everyday life.”
The results of this research were published in the April issue of the internationally renowned journal IEEE/ASME Transactions on Mechatronics (IF = 7.3, JCR top 4.1%).
Maekyung News link: https://www.mk.co.kr/news/it/12023146
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