Adaptive Noise Cancellation System for Low Frequency Transmission of Sound in Open Fan Aircraft

Adaptive Noise Cancellation System for Low Frequency Transmission of Sound in Open Fan Aircraft

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This paper describes the use of a structural/acoustic model Bottom Bracket Kit of a section of a large aircraft to help define the sensor/actuator architecture that was used in a hardware demonstration of adaptive noise cancellation.Disturbances considered were representative of propeller-induced disturbances from an open fan aircraft.Controller on and controller off results from a hardware demonstration on a portion of a large aircraft are also included.

The use of the model has facilitated the development of a new testing technique, closely related to modal testing, Neff N90 C18FT56N1B Steam Oven that can be used to find good structural actuator locations for adaptive noise cancellation.