Science Advances New Soft Actuator: How a Fiber with Grooves Can Redefine the Driving Logic of Soft Robots

A research team led by Tural Khudiyev from the National University of Singapore published a study in Science Advances, introducing a new type of pneumatic actuator called the f-VGB (folding volume-programmable fiber). This fiber achieves multiple preset deformations through an asymmetric groove structure, without the need for multiple chambers or complex control systems. Its working principle is inspired by the geometric expansion mechanism of baleen whales, achieving reversible deformation through two stages: wrinkling expansion and elastic inflation. It offers advantages such as low-pressure driving, high expansion ratio, and weak scale dependency, providing a new driving paradigm for soft robots.