Sunday, February 9, 2025

Bird Inspired Robot For Multimodal Locomotion

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Researchers at EPFL introduced a crow-inspired robot capable of springing into flight, promising efficient aerial mobility.

RAVEN. Image credit: EPFL/Alain Herzog with CC-BY-SA 4.0 license.

Roboticists from the École Polytechnique Fédérale de Lausanne (EPFL), in collaboration with the University of California, have developed an innovative bird-like robot named RAVEN (robotic avian-inspired vehicle for multiple environments). Modeled after the energy-efficient movements of crows, this robot uses spring-loaded legs to leap into flight, a significant departure from conventional drone designs.

Unlike typical drones that rely on rotors or runways for lift-off, this robot incorporates a unique propulsion system inspired by birds. The researchers drew inspiration from observing crows, which use their legs to launch into the air. This approach reduces energy consumption compared to solely wing-based flight mechanisms. “The design appears to be a viable solution to achieving multimodal locomotion for unmanned aerial vehicles,” noted Aimy Wissa, aerospace engineer in her commentary on the project.

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To mimic avian behaviour, the robot was equipped with features beyond its flight capabilities. Its spring-loaded legs allow it to walk, run, and hop, replicating how birds use their limbs for versatile ground movement. This makes it particularly appealing for researchers in fields like wildlife monitoring, where silent and efficient drones are essential. Additionally, first responders and environmental agencies might find its adaptability useful for navigating diverse terrains and responding to emergencies. Unlike flapping-wing designs, the robot employs fixed wings and a split-V tail structure, powered by a front-mounted propeller.

The development process involved rigorous testing to refine the robot’s design. The robot demonstrated its ability to leap while its rotor spun, making smooth airborne transitions. This capability, combined with its ground mobility, positions the robot as a multifunctional innovation in aerial robotics.

Wissa suggested that such technology could be applied to improve drones used in challenging environments, from disaster response to wildlife observation. The crow-inspired approach might offer solutions for energy efficiency and adaptability in unmanned vehicles.

The research team’s findings highlight the potential for biological insights to transform engineering solutions. With the robot, the boundaries of robotics are being redefined, emphasising the interplay of ground and aerial mobility.

Tanya Jamwal
Tanya Jamwal
Tanya Jamwal is passionate about communicating technical knowledge and inspiring others through her writing.

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