This asymmetrical design means that one end of the robot exerts more force on the ground than the other end. One half of the robot is shaped like a twisted ribbon that extends in a straight line, while the other half is shaped like a more tightly twisted ribbon that also twists around itself like a spiral staircase. However, while the previous version of the soft robot had a symmetrical design, the new robot has two distinct halves. This induces a rolling motion the warmer the surface, the faster the robot rolls. When the robots are placed on a surface that is at least 55 degrees Celsius (131 degrees Fahrenheit), which is hotter than the ambient air, the portion of the ribbon touching the surface contracts, while the portion of the ribbon exposed to the air does not. Physical intelligence refers to dynamic objects - like soft robots - whose behavior is governed by their structural design and the materials they are made of, rather than being directed by a computer or human intervention.Īs with the earlier version, the new soft robots are made of ribbon-like liquid crystal elastomers. And it's all done using physical intelligence, rather than being guided by a computer." "We've developed a new soft robot that is capable of turning on its own, allowing it to make its way through twisty mazes, even negotiating its way around moving obstacles. In practical terms this meant that the robot could sometimes get stuck, bouncing back and forth between parallel obstacles. "However, it was unable to turn unless it encountered an obstacle. "In our earlier work, we demonstrated that our soft robot was able to twist and turn its way through a very simple obstacle course," says Jie Yin, co-corresponding author of a paper on the work and an associate professor of mechanical and aerospace engineering at North Carolina State University.
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