Octopus-Inspired artificial muscles boost underwater drones efficiency

Researchers at the University of Iowa have developed a novel approach to enhance the efficiency and maneuverability of underwater vehicles by mimicking the octopus's unique muscle structures. Their innovation involves integrating twisted spiral artificial muscles—synthetic coils inspired by octopus papillae muscles—into the wings of a small underwater hydrofoil. These coils, powered by small electric actuators, unspool in flowing water to reduce drag and increase lift, enabling the craft to move more smoothly and with up to 30% more lift and 10% less drag. This bioinspired design allows the vehicle to maintain stability and control even when sharply tilted against currents, addressing common challenges such as high energy consumption and limited maneuverability in underwater robotics. This research, led by Associate Professor Caterina Lamuta and funded by the U.S. Office of Naval Research, represents the first demonstration of an underwater flow-control device driven by twisted artificial muscles. The technology holds promise for a range of applications, including offshore energy, ocean exploration