Multi-rotor tonal noise control for UAV
US10946953B2 · kind B2 · utility
1Cited by
6References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2017 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Mar 13, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3044
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A technique of controlling tonal noises produced by an unmanned aerial vehicle (UAV) includes generating thrust with a plurality of rotor units mounted to the UAV to propel the UAV into flight. Each of the rotor units includes a bladed rotor. A rotation rate or a phase delay of at least one of the rotor units is adjusted relative to another of the rotor units. The adjustment causes a spread in the tonal noises generated by the rotor units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.