There is increased interest in using electric motors to drive propulsors across a range of small air vehicle classes. Applications include both vertical lift and conventional takeoff and landing systems for Small Unmanned Aircraft Systems. Mission profiles call for integrating these systems into urban airspaces exposing populated areas to new noise sources. In addition to the propulsor noise from rotors and propellers, electric motors are expected to contribute to the overall sound levels and possibly human annoyance. This work presents acoustic measurements of electric motors used for small quadcopters to characterize the sound and identify sources with and without a propeller. Free field microphone measurements were used to determine directivity and a phased microphone array was used to identify sound sources. A companion paper (Part II – Source Characteristics and Prediction) compares the far field results with current probe measurements of the signal driving the motor, the structural response of the motor case, and describes prediction methods of electric motor noise.


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    Titel :

    Electric Motor Noise for Small Quadcopters: Part I - Acoustic Measurements


    Beteiligte:

    Kongress:

    AIAA Aviation Forum 2018 ; 2018 ; Atlanta,GA, United States


    Erscheinungsdatum :

    2018-06-25


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Electric Motor Noise for Small Quadcopters: Part 1 – Acoustic Measurements

    Huff, Dennis L. / Henderson, Brenda S. | AIAA | 2018



    Electric Motor Noise for Small Quadcopters: Part II - Source Characteristics and Predictions (AIAA 2018-2953)

    Henderson, Brenda S. / Huff, Dennis / Cluts, Jordan et al. | British Library Conference Proceedings | 2018


    Thrust sensor based nonlinear motor control for quadcopters

    Elliott, Steven T. / Carr, Thomas W. | IEEE | 2016


    Autonomous Takeoff and Landing for Quadcopters

    Lindberg, Robert | BASE | 2015

    Freier Zugriff