A noise reduction system in a vertical takeoff and landing (VTOL) vehicle is provided. The noise reduction system is configured to: identify a noise level at which the VTOL vehicle can operate; dynamically determine a motor-specific fan RPM and a motor-specific fan pitch that will allow the vehicle to not exceed the noise level based on vehicle noise characteristics and an ambient noise level; determine whether the determined motor-specific fan RPM and motor-specific fan pitch will allow the vehicle to operate within its safety envelope; and cause a motor-specific fan RPM command and a motor-specific fan pitch command to be sent to the lifter motor controller to cause the vehicle lifter motors to operate at the determined motor-specific fan RPM and motor-specific fan pitch when it is determined that the determined motor-specific fan RPM and motor-specific fan pitch will allow the VTOL vehicle to operate within its safety envelope.


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    Title :

    NOISE SIGNATURE PROXIMITY WARNING SYSTEM AND FEEDBACK MECHANISM FOR AIRCRAFT


    Additional title:

    SYSTEM ZUR WARNUNG BEI GERÄUSCHSIGNATURNÄHE UND RÜCKMELDUNGSMECHANISMUS FÜR FLUGZEUG
    SYSTÈME D'AVERTISSEMENT DE PROXIMITÉ DE SIGNATURE DE BRUIT ET MÉCANISME DE RÉTOUR POUR AÉRONEF


    Contributors:

    Publication date :

    2025-01-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B64U



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