What is it about?
Flying robots normally depend on rapidly beating wings or spinning propellers — parts that are hard to shrink, heavy, and wear out. We built a flying microrobot weighing just 36.7 milligrams (lighter than a honeybee) that is pushed through the air by 'ionic wind': thrust generated by electrically charging the air, with no moving mechanical parts at all. An onboard motion sensor (IMU) continuously feeds flight data back to the controller, so the robot can steady itself in the air — cutting pitch and roll wobble by 83% and 89% — and hover for a full hour. With a thrust-to-weight ratio of 5:1, it has plenty of spare lifting power to carry a miniature camera and a fiber-optic strain sensor.
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Why is it important?
Two long-standing barriers have kept ion-propelled microrobots confined to the lab: too little payload capacity and poor controllability. This work resolves both. The spare lifting capacity allows the robot to carry real sensors and complete practical tasks such as environmental surveillance and material identification, while closed-loop control turns unsteady drifting into stable, directed flight. Equally important, the robot is assembled rapidly from origami-inspired metal–polymer composites at a disposable cost — removing the final barrier to deploying large swarms. This opens a path toward autonomous microrobotic swarms for searching collapsed buildings, inspecting confined spaces, and exploring hazardous environments where conventional robots cannot go.
Perspectives
Our dream was to build a flying robot with no moving parts at all — and the moment our 36.7 mg robot held a stable hover for a full hour, guided only by ionic wind and an onboard motion sensor, that dream felt real. What excites me most is not just the flight, but the making: origami-inspired design and simple metal–polymer composites bring the cost of each robot down to something you would not mind losing. Swarms of disposable micro-sentinels that can slip into collapsed buildings, gas leaks, or disaster zones are no longer science fiction — they are an engineering task, and this paper is our first step.
Professor Wei Li
Huazhong University of Science and Technology
Read the Original
This page is a summary of: Controlled flight of high-thrust ultralight ion-propelled microrobot with integrated sensing, Nature Communications, August 2026, Springer Science + Business Media,
DOI: 10.1038/s41467-026-76462-y.
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