The researchers developed a theory that proposes adding pairs of legs to the robot increases its ability to move robustly over challenging surfaces — a concept they call spatial redundancy.
A team of physicists, engineers, and mathematicians at the Georgia Institute of Technology are
to develop a new theory of multilegged locomotion. Through their experiments, they discovered that robots with more legs could move across uneven surfaces with agility without any additional sensing or control technology.“When you see a scurrying centipede, you're basically seeing an animal that inhabits a world that is very different than our world of movement,” said Daniel Goldman, the Dunn Family Professor in the School of Physics.
“Our movement is largely dominated by inertia. If I swing my leg, I land on my foot, and I move forward. But in the world of centipedes, if they stop wiggling their body parts and limbs, they basically stop moving instantly.”The team of researchers developed a theory that proposes that adding leg pairs to the robot increases its ability to move robustly over challenging surfaces — a concept they call spatial redundancy.
“But in applications such as search and rescue, exploring Mars, or even micro-robots, there is a need to drive a robot with limited sensing. There are many reasons for such sensor-free initiative. The sensors can be expensive and fragile, or the environments can change so fast that it doesn’t allow enough sensor-controller response time.
“It's truly impressive to witness the multilegged robot's proficiency in navigating both lab-based terrains and outdoor environments,” said“While bipedal and quadrupedal robots heavily rely on sensors to traverse complex terrain, our multilegged robot utilizes leg redundancy and can accomplish similar tasks with open-loop control.”
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