Quadcopters these days Are very valuable. They take off and hover, take pictures or whatever, and then land, recharge; and Yes. If these drones were birds, they would be prey. But stereotyped Ariel Grasper, or SNAG, will be their biggest prey. This is the new quadcopter Legs, Each with four 3D printed talons that close around anything that communicates with them, whether it’s to rest on a branch or maybe, one day, other drones are flying over there. Where they shouldn’t go. That’s right- this is a drone that can hunt drones.
Over the years, quadcopters have mastered the skies, but not so much in landing: a drone is responsible for tipping over its routers on slightly uneven surfaces. Birds, on the other hand, can wrap their legs around anything, get a grip on their foot pads and talons, which are bought on the roughness of the branch. “Everything is a landing strip for a bird,” says David Lentinck, a biologist and robotist at the University of Groningen in the Netherlands. Science Robotics. “For us, it’s really impressive: the whole idea that if you just design different landing gear, you can sit anywhere.”
SNAG is particularly susceptible to peregrine falcons, one of the most common predators. This dive rapper drops bombs at speeds of up to 200 miles per hour, attacks other birds in mid-air and burrows its mounds into their flesh. It is the fastest animal on earth and a complete threat in the sky.
At 1.5 pounds, the SNAG is actually one-size-fits-all, though it has no wings and plenty of routers. When one of SNAG’s legs touches a branch, it begins to fall, as if you bend your knee. This effect lengthens a tendon in the leg, pulling the strings down each foot. The more the leg falls, the more tension builds up in the tendon, even the quick release mechanism triggers a spring to pull the tendon even harder, causing a tremendous increase in grip strength. happens. Both the claw and toe pads, which are made of bad rubber, covered with grip tape, help to hold the SNAG firmly.
Basically, the robot’s legs convert its impact energy into a grip energy in just 50 milliseconds along the branch. “The robot has. SpeedIt’s not like a helicopter landing, “says Lantinick.” It’s a dynamic landing, a controlled collision. “After landing, an accelerometer checks the robot’s balance in the right foot of the SNAG, and if If necessary, the motors in the hips adjust the posture. To release the grip, another motor reduces the tension in the tendon. The digits automatically return to the open position, causing the SNAG to fly.
In this video, you can see that the robot’s legs work to catch the “prey”, just as a peri-gray falcon can attack other birds from above. As objects make contact with the foot, the energy of the effect is converted into energy that the robot uses to fasten its claws.
And here’s the slow take off. SNAG relies on its routers to generate elevators, just as a hummingbird relies on the rapid fluttering of its wings to take off. (A real Perry Gran Falcon actually flutters. And Shake with your powerful legs to get off the ground.)
One of the current limitations of SNAG is that it is not independent. To perform these experiments, a pilot had to remotely control the robot. But Lentink and his colleagues are working on how to localize a branch for the robot, how to reach it, and how to land on its own.
SNAG is not the first quadcopter with legs. Caltech’s LEg ON Aerial Robotic DrOne (aka Leonardo), launched in 2019, has limbs to rest on the ground. It was designed to better explore Mars. SNAG and Leonardo are both after the same thing, though: energy efficiency. Hovering a drone over an area to monitor an area quickly drains the battery. (NASA has already sent a helicopter to Mars, but it doesn’t have legs, so its flight times are very short.)