# A Bio-Inspired Flapping Wing Rotor of Variant Frequency Driven by Ultrasonic Motor

> Research article (Applied Sciences, 2020) · cited 25× · AI/ML

**Wikidata**: [openalex:W2998303321](https://www.wikidata.org/wiki/openalex:W2998303321)  
**Source**: https://4ort.xyz/entity/a-bio-inspired-flapping-wing-rotor-of-variant-frequency-driven-by-ultrasonic-motor