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Related Experiment Video

Updated: Jun 5, 2025

Measuring the Flight Ability of the Ambrosia Beetle, Platypus Quercivorus Murayama, Using a Low-Cost, Small, and Easily Constructed Flight Mill
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Fast ground-to-air transition with avian-inspired multifunctional legs.

Won Dong Shin1, Hoang-Vu Phan2, Monica A Daley3

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Engineers developed RAVEN, a robotic bird, with multifunctional legs for versatile movement. This innovation enables robots to walk, hop, and jump into flight, overcoming previous limitations in aerial robot locomotion.

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Area of Science:

  • Robotics
  • Bio-inspired Engineering
  • Biomechanics

Background:

  • Birds exhibit remarkable multimodal locomotion, transitioning seamlessly between aerial and terrestrial environments.
  • Existing aerial robots face limitations in versatility due to the trade-off between mechanical complexity and flight capability.
  • Reproducing diverse gaits like walking and jumping in robots while maintaining lightweight design for flight remains a challenge.

Purpose of the Study:

  • To overcome the complexity-versatility trade-off in aerial robots by developing multifunctional legs.
  • To enable robots to perform multimodal locomotion inspired by avian capabilities, including walking, hopping, and jumping take-offs.
  • To enhance the deployment of aerial robots in complex terrains through autonomous take-offs and multimodal gaits.

Main Methods:

  • Development of RAVEN (Robotic Avian-inspired Vehicle for multiple ENvironments) with bird-inspired multifunctional legs.
  • Integration of walking, hopping, and jumping capabilities into a single robotic platform.
  • Analysis of the contribution of jumping to flight take-off speed and energy efficiency.

Main Results:

  • RAVEN successfully demonstrated multimodal locomotion: jumping into flight, walking, and hopping over obstacles.
  • Jumping take-offs were found to significantly increase initial flight speed and be more energy-efficient than non-jump take-offs.
  • Analysis revealed a mass distribution trade-off in birds, with greater leg mass in species with multimodal gait demands.

Conclusions:

  • Multifunctional robot legs can overcome the limitations of traditional aerial robots, enabling greater versatility.
  • The RAVEN system offers a novel approach to bio-inspired robotics, enhancing the applicability of aerial robots in complex environments.
  • This research paves the way for more adaptable and capable aerial robots inspired by avian locomotion.