EPFL develops RAVEN: A drone that can run, jump, and fly
A research team from EPFL has developed an innovative drone that can move with bird-like legs. The model RAVEN (Robotic Avian-inspired Vehicle for multiple ENvironments) is inspired by corvids that effortlessly switch between ground and air movement. The specially designed robotic legs allow the drone to autonomously take off and operate in environments inaccessible to conventional flying drones.
The design is based on a detailed analysis of bird legs and combines mathematical models, simulations, and experimental tests. The drone weighs only 0.62 kg, as heavy components are kept close to the body, while springs and motors mimic the function of bird tendons and muscles. Through an elastic joint in the feet, the drone can walk, hop, and jump, overcoming obstacles up to 26 cm high.
The jump start is particularly efficient: tests showed that it consumes the least energy as it optimally combines kinetic and potential energy. Compared to previous walking robots, which were mostly too heavy to jump, and jumping robots, which couldn't walk, RAVEN offers a unique combination of locomotion modes.
This technology could revolutionize drone inspections, disaster relief, and delivery services in rough or confined areas. Future research will focus on further improving control and landing capabilities. According to Prof. Dario Floreano, RAVEN represents an important step in better understanding the interplay of legs and wings in nature and transferring it to agile, energy-efficient drones.
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