Rotor craft noise cancellation system and method

    公开(公告)号:US11657795B2

    公开(公告)日:2023-05-23

    申请号:US17492617

    申请日:2021-10-03

    Abstract: Rotor noise cancellation through the use of mechanical means for a personal aerial drone vehicle. Active noise cancellation is achieved by creating an antiphase amplitude wave by modulation of the propeller blades, by utilizing embedded magnets through an electromagnetic coil encircling the propeller blades. A noise level sensor signals the rotor control system to adjust the frequency of the electromagnetic field surrounding the rotor and control the speed of the rotor. An additional method comprises of incorporating a phase lock loop within the control system configured to determine the frequencies corresponding to the rotors and generate corrective audio signals to achieve active noise cancellation.

    ROTOR CRAFT NOISE CANCELLATION SYSTEM AND METHOD

    公开(公告)号:US20230377548A1

    公开(公告)日:2023-11-23

    申请号:US18136308

    申请日:2023-04-18

    CPC classification number: G10K11/178 B64C39/024 G10K2210/1281 B64U20/10

    Abstract: Rotor noise cancellation through the use of mechanical means for a personal aerial drone vehicle. Active noise cancellation is achieved by creating an antiphase amplitude wave by modulation of the propeller blades, by utilizing embedded magnets through an electromagnetic coil encircling the propeller blades. A noise level sensor signals the rotor control system to adjust the frequency of the electromagnetic field surrounding the rotor and control the speed of the rotor. An additional method comprises of incorporating a phase lock loop within the control system configured to determine the frequencies corresponding to the rotors and generate corrective audio signals to achieve active noise cancellation.

    Rotor craft noise cancellation system and method

    公开(公告)号:US12033608B2

    公开(公告)日:2024-07-09

    申请号:US18136308

    申请日:2023-04-18

    Abstract: Rotor noise cancellation through the use of mechanical means for a personal aerial drone vehicle. Active noise cancellation is achieved by creating an antiphase amplitude wave by modulation of the propeller blades, by utilizing embedded magnets through an electromagnetic coil encircling the propeller blades. A noise level sensor signals the rotor control system to adjust the frequency of the electromagnetic field surrounding the rotor and control the speed of the rotor. An additional method comprises of incorporating a phase lock loop within the control system configured to determine the frequencies corresponding to the rotors and generate corrective audio signals to achieve active noise cancellation.

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