2024-04-20 06:37:00
[서울신문 나우뉴스]The first walking robots generally had four legs. Indeed, walking on two legs without falling like a human is actually not easy. However, with recent developments in robotic technology, robots that walk on two legs like humans are becoming a reality. Looking at humanoid robots that walk skillfully on two legs, the future in which robots replace human labor no longer seems so distant.
Regardless, for a robot to walk stably or move quickly, it seems reasonable to have an even number of legs, such as two or four, like an animal. But some scientists don’t think that’s necessary. Three bridges may also be a reasonable alternative depending on the situation. A research team from ETH Zurich in Switzerland also considered a three-legged robot.
SpaceHopper, a three-legged robot that started as a student project two and a half years ago, has three long, thin legs like those of an insect. The body here is also triangular. The reason for this strange appearance is that it was designed to move in a celestial body with extremely low gravity, such as an asteroid. If it has three legs, it is stable when standing like a tripod, but it tends to fall over immediately. because he takes a step back. However, on the surface of an asteroid, where there is almost no gravity, there is no need to worry about a fall. In fact, the biggest problem is that gravity is so low that you can’t walk properly no matter how many legs you have. In the case of low-mass asteroids, if the robot pushes the ground with its legs, it may bounce directly into space and become a child lost in space.
The goal of the Spacehopper is not to walk, but to bounce as its name suggests. Press the ground, jump lightly, and when you land back on the ground, use all three legs to balance yourself like a tripod. It may not land all at once and bounce several times. Taking this into account, the legs are designed to withstand impact, even though they are thin. Since the top and bottom are the same and the shape is the same in all three 360-degree directions, completing the mission is no problem no matter which side you land on. The research team tested the Spacehopper robot by creating a simulated microgravity environment. in the laboratory. And to test it in a near-weightlessness environment, we teamed up with the European Space Agency and French company Nobspace to fly the robot aboard the Air Zero G weightless aircraft. Air Zero G is a modified Airbus A310 aircraft that repeatedly freely falls from high altitudes for approximately 30 seconds to provide a weightlessness/microgravity environment for astronauts and onboard laboratories.
Gordon Jeong Science Columnist [email protected]
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