Tiny drones could one day crawl through collapsed buildings to help find survivors after earthquakes. These micro-robots, inspired by insects, now show flight skills close to the real thing. In lab tests, they zipped and flipped with a speed and agility that would have amazed even the most nimble bug.<\/p>\n
From Fragile Flyers to Fast Fliers<\/p>\n
For years, small flying robots \u2014 often called aerial microrobots \u2014 hovered slowly along smooth paths. They lacked the agility of real insects and often struggled whenever conditions got tricky. That changed thanks to work by researchers at MIT<\/a>.<\/p>\n They built a tiny robot no bigger than a matchbox, with flapping wings driven by soft, flexible muscles. The hardware was ready. What held it back was its brain \u2014 the controller that tells it how to move. Until recently, that controller had to be tuned by hand. That limited how fast or how sharply the robot could fly.<\/p>\n Overview of flight maneuvers performed by a 750-mg flapping-wing aerial robot. (CREDIT: Science Advances) Teaching the Robot to Fly Like a Bug<\/p>\n The breakthrough came when the team switched from manual tuning to artificial intelligence. Instead of hand-crafting every motion, they built a two-part control system. First, a high-powered mathematical planner maps out exactly how the robot should move to perform a maneuver. That planner works offline. Then the team uses that data to train a fast AI controller to fly in real time.<\/p>\n This approach captures the best of both worlds: the precision of advanced planning and the speed needed to react in mid-air. The result is a robot that can do aerobatic tricks \u2014 including 10 somersaults in 11 seconds \u2014 anything from tight turns to sharp pitches. Even gusts of wind that would knock many drones off course barely slowed it down.<\/p>\n \u201cWe want to be able to use these robots in scenarios that more traditional quad copter robots would have trouble flying into, but that insects could navigate,\u201d said Kevin Chen, associate professor at MIT\u2019s Department of Electrical Engineering and Computer Science and one of the lead authors.<\/p>\n Performance That Rivals Nature<\/p>\n In their tests, the microrobot\u2019s flight performance exploded. Speed increased by 447 percent. Acceleration jumped 255 percent compared with prior versions. The robot never strayed more than a few centimeters from its planned path.<\/p>\n Controller design and body saccade demonstration. (CREDIT: Science Advances) <\/p>\n The team also demonstrated \u201csaccade\u201d \u2013 fast, abrupt motion insects use to stabilize vision<\/a> and avoid obstacles. That kind of movement could help future versions carry cameras or sensors and move through cluttered, unstable terrain without crashing.<\/p>\n For you, that matters because it hints at a future where tiny robots do jobs too risky or too tight for people or larger machines. Think searching through collapsed buildings for survivors, exploring cramped tunnels after disasters, or reaching remote places in collapsed mines.<\/p>\n From Carbon Copy to Real-World Use<\/p>\n