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Multi-functional soft-bodied jellyfish-like swimming
Summary
Researchers designed a small jellyfish-inspired swimming robot made of magnetic flexible material that can be controlled by an external oscillating magnetic field to perform multiple tasks in water. The robot demonstrates how soft, jellyfish-like designs could be used for underwater object manipulation, and may also help scientists study how real jellyfish move.
The functionalities of the untethered miniature swimming robots significantly decrease as the robot size becomes smaller, due to limitations of feasible miniaturized on-board components. Here we propose an untethered jellyfish-inspired soft millirobot that could realize multiple functionalities in moderate Reynolds number by producing diverse controlled fluidic flows around its body using its magnetic composite elastomer lappets, which are actuated by an external oscillating magnetic field. We particularly investigate the interaction between the robot's soft body and incurred fluidic flows due to the robot's body motion, and utilize such physical interaction to achieve different predation-inspired object manipulation tasks. The proposed lappet kinematics can inspire other existing jellyfish-like robots to achieve similar functionalities at the same length and time scale. Moreover, the robotic platform could be used to study the impacts of the morphology and kinematics changing in ephyra jellyfish.
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