Wind noise control method and device for vehicle

Abstract

The invention discloses a wind noise control method and device for a vehicle.The wind noise control method comprises the following steps of: S1, sampling vehicle window opening degree information in real time or regularly; S2, calculating the inherent frequency of a Helmholtz resonator formed by the carriage and the vehicle window according to the vehicle window opening degree information; S3, determining whether a wind vibration noise modal mark signal is generated or not according to the inherent frequency, and executing the following step S4 when the wind vibration noise modal mark signal is generated; S4, generating a reference signal according to the inherent frequency, updating filter parameters according to the reference signal and a noise signal in the vehicle, and outputting a stable control signal; and S5, driving a loudspeaker to generate an active control sound field according to the stable control signal, and coherently superposing the active control sound field with a noise field. The active noise reduction mode is adopted to solve the problem of wind vibration noise, and the vehicle structure does not need to be changed excessively.

Description

technical field [0001] The invention belongs to the technical field of vehicle noise reduction, and relates to a wind noise control method and device for vehicles. Background technique [0002] Noise is a key issue in automotive NVH (Noise, Vibration, Harshness). At present, the application of active control to reduce the noise inside the car has become a hot topic. But the current research is mainly concerned with the problem of noise control in the sealed car interior. However, in the actual driving environment, the drivers and passengers in the car often open the windows for ventilation. At this time, there will be relatively obvious noise, which is called wind buffeting noise, or wind noise for short. [0003] The principle of wind vibration noise is as follows: when the window is opened, a cavity is formed in the compartment; when the car is driving at high speed, a shear layer is formed between the airflow flowing at high speed outside the car and the relatively stil...

AI Technical Summary

Problems solved by technology

Although the patent document CN107195294 provides an active noise reduction method and device for vehicles, the method is aimed at the active control of the environmental noise transmitted to the interior and exterior of the vehicle through the open window, and the method reduces the noise outside the vehicle. ambient noise

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