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.


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    Title :

    MULTI-ROTOR TONAL NOISE CONTROL FOR UAV


    Contributors:
    PANTALONE GIULIA (author) / WOODWORTH ADAM (author) / TELLER ERIC (author) / KIM EALGOO (author) / HUFFMAN JACOB (author) / KUBIE MARTIN (author)

    Publication date :

    2019-06-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES



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