The world of drones has consistently amazed with its ingenuity and creativity, but a new prototype developed by the EPFL’s Laboratory for Intelligent Systems (LIS) in collaboration with the BioRobotics Laboratory and the Neuromechanics Laboratory at the University of California, Irvine, pushes the boundaries of conventional drone design. Instead of merely taking off, this vehicle quite literally jumps into the air.
A new way to launch: Inspired by nature
The drone, dubbed RAVEN (Robotic Avian-inspired Vehicle for multiple ENvironments), combines walking, jumping, and flying capabilities, making it one of the most versatile and peculiar drones ever developed. The engineers behind RAVEN took direct inspiration from birds, particularly crows and ravens, renowned for their agility and adaptability in challenging environments.
Much like its biological counterparts, RAVEN’s design includes legs equipped with three toes, enabling it to walk on uneven terrain, cross obstacles, and achieve stable take-offs and landings.
These features make it especially suited for environments that conventional drones might struggle to navigate. RAVEN’s ability to jump into the air mirrors the movement of real birds, leveraging an efficient and dynamic launch mechanism that improves stability during take-off.
Engineering innovation: From observation to execution
According to Won Dong Shin, a researcher at LIS, early aircraft designs were heavily influenced by the observation of birds, but modern drones still fall short of matching the flexibility and adaptability of their natural counterparts. By integrating features inspired by bird anatomy and behavior, RAVEN represents a significant step toward narrowing this gap.
At its current prototype stage, RAVEN can jump up to 26 centimeters a modest feat for now. However, this represents a critical proof of concept for a drone that combines multimodal capabilities. While it is not yet capable of carrying cargo or traveling long distances, its potential applications are vast.
For example, its unique design could make it highly effective in search-and-rescue operations, ecological surveys, or military reconnaissance in rugged terrains where traditional drones might falter.
Challenges and future development
Despite its promise, RAVEN is still in its infancy. Engineers are focused on refining the coordination between its legs and wings to enhance efficiency and expand its range of motion. This includes improving its ability to adapt to different environments and increasing its payload capacity.
The ultimate goal is to create a drone that can seamlessly switch between walking, jumping, and flying, making it the most “multimodal” drone ever developed. Achieving this will require overcoming significant technical hurdles, such as improving the durability of its components, optimizing energy efficiency, and ensuring reliable control mechanisms for its complex movements.
Broader context: A growing trend in biomimetic design
RAVEN is not the first attempt at designing a bird-like vehicle. A few years ago, the South African startup Phractyl unveiled the concept for its Macrobat transport vehicle. While similar in its bird-inspired design, the Macrobat is envisioned as an eVTOL (electric vertical take-off and landing) vehicle capable of transporting people. Unlike RAVEN, the Macrobat remains a concept, with no working prototype yet developed.
The exploration of bird-inspired designs reflects a broader trend in biomimicry—a field that seeks to replicate the efficiency and adaptability of natural organisms. By studying how birds balance their bodies, coordinate their movements, and interact with their environment, engineers are discovering innovative ways to overcome limitations in modern robotics.
The promise of RAVEN
While RAVEN’s capabilities are currently limited to laboratory experiments, its development represents an exciting glimpse into the future of drone technology. With further research and refinement, drones like RAVEN could play a pivotal role in applications ranging from disaster relief to precision agriculture. By combining walking, jumping, and flying, RAVEN pushes the boundaries of what drones can achieve, opening the door to entirely new possibilities.
For now, this bird-like machine stands as a testament to the power of biomimicry and the potential of robotics to adapt and evolve in response to real-world challenges. As engineers continue to perfect its design, RAVEN could very well redefine the way we think about drones.
Source: epfl.ch
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