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Vehicle Active Noise Reduction Control Method and System

A technology of active noise reduction and control methods, applied in active noise control, musical instruments, sounding instruments, etc., can solve the problems that noise signals and denoising signals cannot be matched and read all the time, so as to simplify logic algorithms, shorten response time, and ensure The effect of active noise cancellation

Active Publication Date: 2021-07-30
ZHENGZHOU YUTONG BUS CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a vehicle active noise reduction control method and its system, which is used to solve the problem that the denoising signal generated by the existing active noise reduction device cannot always match the read noise signal

Method used

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  • Vehicle Active Noise Reduction Control Method and System
  • Vehicle Active Noise Reduction Control Method and System
  • Vehicle Active Noise Reduction Control Method and System

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specific Embodiment

[0020] Such as figure 1 As shown, the vehicle active noise reduction system in this embodiment includes a microphone 1, a speaker 2, and a control system 3. The microphone 1 and the speaker 2 are arranged at the human ear of the seat 4, and are connected to the control system 3 through a wire harness. The control system 3 It includes a memory, a processor, and a computer program stored on the memory and operable on the processor. When the processor executes the computer program, the vehicle active noise reduction control logic in this embodiment can be realized.

[0021] In this embodiment, the control system 3 is mainly composed of an audio analysis module 31, a noise data module 32, and a signal generation module 33, wherein the audio analysis module 31 mainly confirms the phase parameters of the noise signal read by the microphone 1, and the noise data module 32 is used for storing The noise amplitude parameter of the driving axle under the normal operation condition of the...

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Abstract

The invention relates to a vehicle active noise reduction control method and system thereof. The control method includes the following steps: 1) reading the noise signal at the target position; 2) calculating the frequency parameter of the drive axle according to the vehicle speed signal, and extracting the phase parameter of the drive axle noise from the noise signal according to the frequency parameter; 3) Obtain the amplitude parameter of the drive axle noise according to the vehicle speed signal and the suspension compression signal; 4) Generate the noise reduction signal of the drive axle according to the frequency parameter, phase parameter and amplitude parameter of the drive axle noise, and use the drive axle The denoised signal of is denoised at the target position. The invention extracts the phase parameter of the drive axle noise from the noise signal, and the drive axle amplitude parameter is obtained according to the vehicle speed signal and the suspension compression signal, which can greatly simplify the logic algorithm, greatly improve the operating efficiency, shorten the reaction time, and ensure There is no time difference between the noise reduction signal and the noise signal, effectively ensuring the active noise reduction effect of the present invention.

Description

technical field [0001] The invention relates to a vehicle active noise reduction control method and a system thereof, and belongs to the technical field of vehicle active noise reduction. Background technique [0002] Car ride comfort is one of the important indicators that affect the performance of the vehicle, and the control of the noise level in the vehicle is an important way to improve the brand effect of the vehicle. For passenger cars, the main noise sources in the car during driving are engine noise and drive axle gear noise, which account for more than 80% of the noise in the car. Axle noise has become the main factor affecting pure electric buses. Therefore, for transmission buses and pure electric buses, reducing the noise of drive axle gears can significantly improve the noise level in the car and improve the comfort of the vehicle. [0003] Conventional automotive noise reduction measures are often achieved by optimizing the noise of the drive axle body, impro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K11/178
CPCG10K2210/1282G10K2210/12821G10K2210/3011G10K11/17821G10K11/17857
Inventor 王占彬郜盼盼曹受天陈志恒郑灏
Owner ZHENGZHOU YUTONG BUS CO LTD
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