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A versatile jellyfish-like robotic platform for effective underwater propulsion and manipulation

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SCHOOL OF MEDICINE
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Wang, Tianlu
Joo, Hyeong-Joon
Song, Shanyuan
Hu, Wenqi
Keplinger, Christoph

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Underwater devices are critical for environmental applications. However, existing prototypes typically use bulky, noisy actuators and limited configurations. Consequently, they struggle to ensure noise-free and gentle inter-actions with underwater species when realizing practical functions. Therefore, we developed a jellyfish-like robotic platform enabled by a synergy of electrohydraulic actuators and a hybrid structure of rigid and soft components. Our 16-cm-diameter noise-free prototype could control the fluid flow to propel while manipulat-ing objects to be kept beneath its body without physical contact, thereby enabling safer interactions. Its against -gravity speed was up to 6.1 cm/s, substantially quicker than other examples in literature, while only requiring a low input power of around 100 mW. Moreover, using the platform, we demonstrated contact-based object ma-nipulation, fluidic mixing, shape adaptation, steering, wireless swimming, and cooperation of two to three robots. This study introduces a versatile jellyfish-like robotic platform with a wide range of functions for diverse applications.

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Amer Assoc Advancement Science

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Multidisciplinary sciences

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Science Advances

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10.1126/sciadv.adg0292

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