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Active control method for road noise

An active control, one-way technology, applied in active noise control, sound-generating devices, instruments, etc., to solve interference problems and reduce computing power consumption

Pending Publication Date: 2021-07-13
AUTOMOBILE RES INST OF TSINGHUA UNIV IN SUZHOU XIANGCHENG +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no mass-produced model equipped with road noise ANC system

Method used

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  • Active control method for road noise
  • Active control method for road noise
  • Active control method for road noise

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Embodiment 1

[0028] Embodiment 1: Based on the needs of industrialization and aiming at lower computing consumption, a road noise active control method combined with virtual multi-point mapping is proposed to solve the problem of positional interference between the microphone and the listener.

[0029] A road noise active control method for realizing active road noise cancellation in the passenger compartment of an automobile is shown in the attached figure 1 shown in figure 1 Among them, 1 is the speaker used for control, 2 is the microphone used to collect the sound signal, and the position of microphone 2 is the actual measurement point in the car. There are also several virtual points in the car, and the positions of the virtual points are distributed near the ears of passengers.

[0030] The road noise active control method is as follows: through the microphone 2, the measured point sound signal e is collected at the measured point in the car. p (n), obtain the reference signal x(n)...

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Abstract

The invention relates to an active control method for road noise, which is used for realizing active elimination of the road noise in a passenger compartment of an automobile and comprises the following steps of: acquiring an actual measurement point sound signal at an actual measurement point in the automobile, acquiring a reference signal in the automobile, acquiring an excitation signal of a loudspeaker arranged in the automobile, and sending the actual measurement point sound signal and an excitation signal of the loudspeaker to a virtual multi-point mapping estimation link to obtain a virtual point sound signal, wherein the excitation signal of the loudspeaker is obtained by sending a reference signal and the virtual point sound signal to a time-frequency double-thread self-adaptive filtering link. According to the invention, through a time-frequency dual-thread adaptive filtering mode, the computing power consumption of the algorithm is reduced, and the algorithm can be effectively carried on a low-cost chip; and the problem of interference between the microphone and passengers in road noise control is solved through a virtual multi-point mapping estimation mode, and it is guaranteed that the algorithm can be industrially implemented.

Description

technical field [0001] The invention belongs to the field of active control of noise, in particular to a control method capable of realizing active elimination of road noise in an automobile passenger compartment. Background technique [0002] Under the general trend of light weight and electrification, major OEMs are "few measures are too difficult" to control road noise. After balancing cost, weight, performance and development cycle, the development of active and passive road noise has gradually become the mainstream. solution. [0003] Active Noise Control (ANC for short) was first proposed by German physicist Paul in 1933, and then fell into a blank period of development due to the limitations of modern control theory and electronic technology level. After the 1980s, the rapid development of large-scale integrated circuits and digital signal processing technology has enabled unprecedented development of active noise control. [0004] In terms of algorithm research, th...

Claims

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Application Information

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IPC IPC(8): G10K11/178
CPCG10K11/17815G10K11/17817G10K11/17853G10K11/17883G10K2210/1282
Inventor 彭博范佳亮韩强郑四发
Owner AUTOMOBILE RES INST OF TSINGHUA UNIV IN SUZHOU XIANGCHENG
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