WASHINGTON: Researchers have taken inspiration from the cockroach to create a robot that can use its body shape to manoeuvre through a densely cluttered environment.
Fitted with the characteristic rounded shell of the discoid cockroach, the running robot can perform a roll manoeuvre to slip through gaps between grass-like vertical beam obstacles without the need for additional sensors or motors. While many terrestrial robots are developed with a view to perform a wide range of tasks by avoiding obstacles, few have been specifically designed to traverse obstacles.
“The majority of robotics studies have been solving the problem of obstacles by avoiding them, which depends on using sensors to map out the environment and algorithms that plan a path to go around obstacles,” said study author Chen Li, from the University of California. “However, when terrain becomes densely cluttered, especially as gaps between obstacles become comparable or even smaller than robot size, this approach starts to run into problems.”
In their research, the scientists used high-speed cameras to study the movement of discoid cockroaches through an artificial obstacle course containing grass-like vertical beams with small spacing.
Living on the floor of tropical rainforests, this specific type of cockroach frequently encounters a wide variety of cluttered obstacles, such as blades of grass, shrubs, leaf litter, tree trunks, and fungi.
The cockroaches were fitted with three different artificial shells to see how their movement was affected by body shape when moving through the vertical beams. The shapes of the three shells were: an oval cone with a similar shape to the cockroaches’ body; a flat oval; and a flat rectangle.
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