Robots That Can Never Die : The End of Mechanical Death

Engineers at Northwestern University have created a first modular robot with atheltic intelligence called “legged metamachaine.” These robots are made of small, Lego-like parts. Each part is actually a complete mini robot with its own motor, battery, and computer. On its own, one part can move, roll, and jump. But when many parts join together, they become much stronger and more capable.

The interesting part is how these robots are designed. The team used AI to come up with new shapes and structures instead of copying animals or humans. This metamachine can move in unusual ways, like sliding like a seal, jumping like a kangaroo, or crawling like a lizard.

Northwestern’s Sam Kriegman, who led the study said, “These are the first robots to set foot outdoors after evolving inside of a computer.” These robots are very tough and assembles rapidly. If they fall over, they can flip back up by themselves. Even if a part breaks off, the rest of the robot keeps moving. Even the broken piece can still move and come back to join the group. To build them, scientists used a computer program that works like evolution in nature. It creates many designs, tests them, keeps the best ones, and improves them over time. This helped the team find the best robot shapes for moving on rough ground like sand, grass, and mud.

Kriegman said, “We simulated the Darwinian process of mutation and selection within a virtual, physical environment,” “This is survival of the fittest accelerated by computers and made real by athletic modular building blocks.”

In real-world tests, these robots could run, jump, spin, and move over difficult surfaces without needing extra adjustments. Unlike normal robots, which stop working if something breaks, these can adapt and continue working. Kriegman said. “Metamachines can be rapidly assembled, repaired, redesigned, and recombined.”

Overall, these metamachines are a big step forward. They are not just machines that follow fixed designs but they can adapt, survive damage, and work in changing environments, almost like living creatures. Kriegman said. “But they still taught us a lot about how evolution works and how to distill those lessons into useful technologies.”

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