Apparatus and method for active controlling of noise using a medium fluid in a pipe

摘要

The present invention relates to an apparatus and method for controlling active noise of a noise by measuring a noise generated in a pipeline of a trap and generating a control signal capable of suppressing the noise to thereby actively reduce the noise, . The active noise control apparatus for noise using a fluid inside a pipe according to the present invention comprises a pair of noise measurement sensors 11 and 12 spaced apart from each other on a pipe P through which fluid flows in a vessel, A directional signal separation unit 21 for separating a progress signal propagated from the signal sensed by the noise measurement sensors 11 and 12 to the outside of the ship and a reflection signal reflected from the end of the pipe, An acoustic feedback signal correcting part 25 for compensating a control signal in the noise signal separated by the noise canceling part 21 to recover an address sound signal and a noise canceling part 25 for restoring the noise signal restored in the time domain using a plurality of notch filters arranged in a cascade manner A frequency estimator 22 for estimating a frequency component, a reference signal generator 23 for generating a reference signal for noise control using the estimated frequency, and a plurality of adaptive filters, A control signal generator 24 for generating a control signal by using the residual noise signal and the generated reference signal using the control signal generator 24 and a control noise generator 24 for radiating a signal output from the control signal generator 24 to the pipe P, (26).