An extensive wind tunnel test campaign has been conducted to investigate the acoustic emissions of small unmanned aerial systems. An L26H propeller was tested with and without two upstream wing configurations to determine the effect inflow disturbance has on acoustic emissions. A range of propeller revolution rates, wind tunnel speeds, and yaw angles were investigated, and a subset of the results are documented here. Also documented is an acoustic detection calculation method that was used to determine the effect inflow disturbance on the propeller system has on acoustic detection of UAS vehicles. The data clearly proves that full vehicle aerodynamics are required to predict acoustic detection metrics for UAS vehicles, as upstream bodies provide a tactically significant increase in acoustic emissions of the vehicle.


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    Title :

    Acoustic Signature Measurements and Modelling of sUAS Vehicles


    Contributors:

    Publication date :

    2021


    Size :

    40 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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