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    Incredible Footage Shows Drone Swarm Navigate Thick Forest With Eerie Precision

    A swarm of 10 bright blue drones lifts off in a bamboo forest in China, then swerves its way between cluttered branches, bushes, and over uneven ground as it autonomously navigates the best flight path through the woods.

     

    The experiment, led by scientists at Zhejiang University, evokes scenes from science fiction – and the authors in fact cite films such as Star Wars, Prometheus, and Blade Runner 2049 in the opening of their paper published Wednesday in the journal Science Robotics.

    “Here, we take a step forward (to) such a future,” wrote the team, led by Xin Zhou.

    In theory, there are myriad real-world applications, including aerial mapping for conservation and disaster relief work. But the technology has needed to mature so that flying robots can adapt to new environments without crashing into one another or objects, thus endangering public safety.

    Drone swarms have been tested in the past, but either in open environments without obstacles, or with the location of those obstacles programmed in, Enrica Soria, a roboticist at the Swiss Federal Institute of Technology Lausanne, who was not involved in the research, told AFP.

    “This is the first time there’s a swarm of drones successfully flying outside in an unstructured environment, in the wild,” she said, adding the experiment was “impressive”.

    The palm-sized robots were purpose-built, with depth cameras, altitude sensors, and an on-board computer. The biggest advance was a clever algorithm that incorporates collision avoidance, flight efficiency, and coordination within the swarm.

     

    Since these drones do not rely on any outside infrastructure, such as GPS, swarms could be used during natural disasters.

    For example, they could be sent into earthquake-hit areas to survey damage and identify where to send help, or into buildings where it’s unsafe to send people.

    It’s certainly possible to use single drones in such scenarios, but a swarm approach would be far more efficient, especially given limited flight times.

    Another possible use is having the swarm collectively lift and deliver heavy objects.

    There’s also a darker side: swarms could be weaponized by militaries, just as remote-piloted single drones are today. The Pentagon has repeatedly expressed interest and is carrying out its own tests.

    “Military research is not shared with the rest of the world just openly, and so it’s difficult to imagine at what stage they are with their development,” said Soria.

    But advances shared in scientific journals could certainly be put to military use.

    Coming soon?

    The Chinese team tested their drones in different scenarios – swarming through the bamboo forest, avoiding other drones in a high-traffic experiment, and having the robots follow a person’s lead.

    “Our work was inspired by birds that fly smoothly in a free swarm through even very dense woods,” wrote Zhou in a blog post.

     

    The challenge, he said, was balancing competing demands: the need for small, lightweight machines, but with high-computational power, and plotting safe trajectories without greatly prolonging flight time.

    For Soria, it’s only a matter of a few years before we see such drones deployed in real-life work. First, though, they will need to be tested in ultra-dynamic environments like cities, where they’ll constantly come up against people and vehicles.

    Regulations will also need to catch up, which takes additional time.​

    © Agence France-Presse

     

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