Active noise reduction method, storage medium, active noise reduction controller and aircraft

Abstract

The embodiment of the invention discloses an active noise reduction method for an aircraft cabin, a storage medium, an active noise reduction controller and an aircraft, and the method comprises the steps: collecting a plurality of vibration signals of a fuselage through a plurality of vibration sensors, and determining a reference signal according to the plurality of vibration signals; determining a noise suppression signal according to the reference signal and the adaptive adjustment coefficient, and outputting the noise suppression signal through a loudspeaker in the noise reduction area; a noise residual signal of the noise reduction area is collected, the adaptive adjustment coefficient is updated according to the noise residual signal and the reference signal, and the noise residual signal is a signal formed after the noise suppression signal and the original noise signal are offset; and returning to execute the operation of determining the noise suppression signal according to the reference signal and the self-adaptive adjustment coefficient based on the updated self-adaptive adjustment coefficient until the intensity of the noise residual signal is smaller than a preset threshold value so as to achieve a good active noise reduction effect.

Description

technical field [0001] The invention relates to the technical field of aircraft, in particular to an active noise reduction method for an aircraft cabin, a storage medium, an active noise reduction controller and an aircraft. Background technique [0002] If the aircraft cabin is noisy, it will seriously affect the comfort of passengers, so it is necessary to reduce the noise of the aircraft cabin. At present, most of the noise reduction measures are only passive noise reduction. When dealing with low-frequency noise, the passive noise reduction method is to reduce noise by installing sound-absorbing materials in the cabin. However, due to the long wavelength of low-frequency noise, the required sound absorption The amount of material is relatively large, which will increase the size and weight of the aircraft, and the passive noise reduction method can only have a certain noise reduction effect for the preset frequency. Once the noise frequency fluctuates, the noise reducti...

AI Technical Summary

Problems solved by technology

At present, most of the noise reduction measures are only passive noise reduction. When dealing with low-frequency noise, the passive noise reduction method is to reduce noise by installing sound-absorbing materials in the cabin. However, due to the long wavelength of low-frequency noise, the required sound absorption The amount of material is relatively large, which will increase the size and weight of the aircraft, and the passive noise reduction method can only have a certain noise reduction effect for the preset frequency. Once the noise frequency fluctuates, the noise reduction effect will be reduced. Obvious reduction

It can be seen from this that the noise reduction effect of the current aircraft cabin is relatively poor.

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