A team of roboticists from École Polytechnique Fédérale de Lausanne, in collaboration with a researcher from the University of California, has created a bird-inspired robot capable of launching itself into the air using spring-like legs. This innovative robot is detailed in a paper published in Nature, accompanied by a commentary from Princeton University aerospace engineer Aimy Wissa, who explores potential real-world applications for the technology.
A New Take on Drone Launch
Unlike traditional drones that rely on vertical takeoff rotors or require runways for forward-thrust engines, this robot employs a unique method: jumping into flight. The researchers drew inspiration from crows observed near their workplace, noting how these birds use their legs to spring into the air, conserving energy compared to using their wings alone.
Design Inspired by Crows
The team designed a robot that mimics the multifunctional use of crow legs—not only for launching into flight but also for walking, running, and hopping. To streamline the design, they opted for fixed wings instead of flapping ones and incorporated a split-V tail. The robot, powered by a front-mounted engine driving a single propeller, combines simplicity with efficiency.
Testing the RAVEN
Named RAVEN (Robotic Avian-inspired Vehicle for multiple ENvironments), the robot demonstrated its ability to walk, hop, and jump in tests. With some adjustments, it successfully launched into the air by springing off its legs while its rotor spun to provide lift.
Wissa described the design as a promising solution for achieving multimodal locomotion in unmanned aerial vehicles, offering potential for diverse applications in robotics and aviation.
Significance
This innovation opens doors to more energy-efficient, versatile drones capable of adapting to various environments, combining ground mobility with aerial capabilities in a single platform.
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