Researchers have built a lizard robot to study how geckos slip and fall to the ground
These findings could help improve robotic mobility and make robots stronger.

There are many examples of gliding animals: for example, flying squirrels, as well as snakes, lizards and frogs. Now we can add geckos to that list. According to an article in the September issue of Nature Communications Biology, researchers caught Asian flat-tailed cranes gliding in nature in high-speed video and found that they used their tails to stabilize the descent after colliding with tree trunks. They validated its biomechanics by building a small helical robot and simulating sliding behavior in a laboratory.

There is rarely time to write about any interesting science fiction that comes to us. So this year, we're once again launching a series of twelve-day Christmas specials, highlighting a vanished sci-fi story in 2020 every day from December 25 to January 5. Today: Wild flat-tailed Asian geckos use their tails to stabilize landings after hitting tree trunks.

As already mentioned, small lizards can do unusual things, easily pressing along vertical walls, and even running in the water over short distances. Exactly how these masterpieces are executed has always been the focus of scholars' interest. Jackets, for example, are known as expert climbers who can stick to any surface thanks to the delicate hair-like structures on the bottom of their feet. Small lizards can also rotate at high speeds along the surface of the water to escape from predators. They can't do this for long. The required power consumption is enormous.

A 2018 study found that rat-sized lizards use a combination of surface tension and slap motion to cross water. In the past year, Researchers have found insights into the fundamental question of why gaco toes are multiple. The ability of levers to change the direction of their flex toes appears to be a major factor in repositioning and resetting with changes in gravity (load).

Continue reading Geko Finger Hair to help stick to different surfaces

Both studies were conducted by Robert Foley, a biophysicist at the University of California, Berkeley, who co-authored the article. This time around, Voll and his colleagues — Ardian Josefi and Rob Sidal — both at the Max Planck Institute for Intelligent Systems in Stuttgart, Germany, and Greg Bern of Sina College — were fascinated by field reports of flat geckos. and skydiving, although this behavior has never been studied quantitatively. Previous research has placed lizards in a wind tunnel and found that the animals can indeed glide slowly and often use their tails to help their bodies rotate through the air. It has been hypothesized that the Asian flat-tailed lizard not only glides slowly. In its natural habitat, it also uses its tail to rotate and maneuver towards its chosen landing site. This species lives in trees and can jump several meters from one tree trunk to another, usually to deter predators. Josephine suggested trying lizards at a wildlife sanctuary in the Singapore rainforest. src="" alt=" Researchers have built a lizard robot to study how lizards slide and fall to the ground" srcset=" content / uploads / 2021/12 / gecko3-crash.jpg 2x "> Zoom / Image lizard (FAR) Reaction stopped. Under V

first, they collected several geckos (both with and without them). Tail). They set up a platform a few meters off the ground from which geckos jumped and approached a tree. High-speed cameras recorded frustrating jumps and showed that a typical jumping gecko can reach speeds of about 6 meters per second (about 13.4 miles per hour).

These tailed lizards can constantly land on the ground. The target torso did not fall, while those without a tail could not hold their fists after landing. The team expected the geckos to make a "controlled collision" landing, like a flying reptile. Instead, the lizards wound up on tree trunks and used their tails to stabilize the landings.

“Our efforts to photograph the tiny lizards camouflaged in the rainforest showed that no one thought these lizards could stop them from falling, but stopped responding. It was previously thought that contact tails were used to maintain stickiness while running,” said Josefi. quickly on the wall, while the results presented here show that lizards show their behavior to improve success.” comes after their guided aerial landing. A tree stump in the laboratory." src="" alt=" Researchers have created a lizard robot to study how lizards slip and fall to the ground" srcset="https://cdn. < p> In particular, when a lizard falls, it bends its torso back to curb the impact, sometimes as high as 100. This means that the front legs lose their adhesion and the legs become stuck. Background gel for a long time. When the lizard bounces back, it pushes its tail into the trunk to dissipate the energy of the collision. The tail essentially acts as a fifth leg and helps stabilize the animal after landing. The jackets, which naturally lost their tails, could not consume enough energy, which is why they fell. Advertising

Our understanding of the multifunctional tail. "Supplements that animals can rely on," Josefi said. “From inertia to tail tactile, they facilitate more intense transitions, such as frustrating flight to hitting a wall. One of the most dramatic transitions we can think of in multidimensional motion is landing on a vertical surface from a height.” — Paragliding at speed at rest . "  Image of the landing process of a lizard-inspired <b>robot</b> zoom/image of the landing operation of the robot inspired by Gaku Ella Maru Studio

To confirm their field observations, the team of a lizard-inspired robot with a soft torso and four legs compatible with Velcro pads underneath. On the wall. Push to install the landing. < p> The Researchers used the catapult to launch robot toward landing surface: A wooden board covered with a plate of felt to simulate a tree trunk, mounted just below the second plate. to the R force sensor, so that only the rear leg of the robot touches when landing. Josephi and his colleagues filmed their launches and used video to extract information about the robot's condition during descent, and the number is reduced and the work is easier. To keep the robot suspended after a crash. However, when the lizard's tail was removed, the forces on its hind legs were too great, causing the robot to lose grip and jump and fall—just like its live-tailed counterparts. So the tail is really necessary to stabilize the random high-speed landing of the lizard. According to Josephine, this may one day help improve robotic locomotion, strengthen biology-inspired robots, and make them easier to control. DOI: Nature Communications Biology, 2021. 10.1038/s42003-021-02378-6 (about DOI). Why doesn't Apple Touch return an ID to iPhone?

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