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Related Experiment Video

Updated: Sep 10, 2025

Measurement of Dynamic Force Acted on Water Strider Leg Jumping Upward by the PVDF Film Sensor
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Water Strider-Inspired, Responsive Jumping Robot Driven by Electro-Ribbon Actuator.

Jianhao Liu1, Yangyang Zhao1, Wanqiu Zhang1

  • 1School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|August 21, 2025
PubMed
Summary

This study introduces a biomimetic water strider robot that uses surface tension for jumping, achieving rapid, high leaps with minimal disturbance. This innovation offers new design principles for dynamic fluid surface interactions.

Keywords:
biomimetic robotelectro‐ribbon actuatorsurface tensionwater strider

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Area of Science:

  • Robotics
  • Biomimetics
  • Fluid Dynamics

Background:

  • Water striders exhibit remarkable agility on water surfaces for predator evasion.
  • Existing bioinspired jumping robots use water pressure, leading to slow responses and significant hydrodynamic disturbances.

Purpose of the Study:

  • To develop a centimeter-scale jumping biomimetic water strider robot utilizing surface tension.
  • To achieve rapid actuation and high-performance water surface locomotion.

Main Methods:

  • Design of a water strider robot employing an electro-ribbon actuator.
  • Analysis of the dynamic contact mechanism between the robot's legs and the liquid-air interface.

Main Results:

  • The robot achieved vertical leaps of 128 mm with sub-second kinetics response.
  • Demonstrated minimal surface perturbation during actuation.
  • Exhibited significantly higher gravitational potential energy compared to existing robots.

Conclusions:

  • The electro-ribbon actuator enables high-performance, rapid jumping on water surfaces.
  • Provides new design principles for biomimetic systems interacting with fluid surfaces.
  • Highlights the potential of surface tension for advanced robotic locomotion.