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Active vehicle noise reduction control method and system thereof

A technology of active noise reduction and control methods, which is applied to vehicle components, circuits or fluid pipelines, transportation and packaging, etc. It can solve the problems that the denoising signal cannot always match the reading, noise signals, etc., to shorten the response time and simplify the Logic algorithm to ensure the effect of active noise reduction

Active Publication Date: 2019-07-16
ZHENGZHOU YUTONG BUS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object 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 noise reduction signal generated by the existing active array noise device cannot always match Read Noisy Signal Problems

Method used

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  • Active vehicle noise reduction control method and system thereof
  • Active vehicle noise reduction control method and system thereof
  • Active vehicle noise reduction control method and system thereof

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Experimental program
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Effect test

Embodiment 1

[0029] 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 ears of the seat 4 and are connected to the control system 3 through a wiring harness. The control system 3 It includes a memory, a processor, and a computer program that is stored on the memory and can run on the processor. When the processor executes the computer program, the vehicle active noise reduction control logic in this embodiment can be implemented.

[0030] The control system 3 in this embodiment is mainly composed of an audio analysis module 31, a noise data module 32, and a signal generation module 33. The audio analysis module 31 mainly confirms that the microphone 1 reads the phase parameters of the noise signal, and the noise data module 32 is used for storage For the noise amplitude parameters of the engine under normal operating conditions of the whole v...

Embodiment 2

[0044] The difference between this embodiment and Embodiment 1 is that this embodiment also includes a process of reducing the noise of the drive bridge.

[0045] In this embodiment, the noise data module 32 is also used to store the noise amplitude parameters of the drive axle under normal operating conditions of the entire vehicle; accordingly, the signal generation module 33 is based on the phase parameters and noise of the engine and drive axle transmitted from the audio module 31 The amplitude parameters of the engine and the drive axle in the data module 32 generate matched engine and drive axle noise reduction signals, which are sent out through the speaker 2 to offset the noise of the engine and the drive axle in the vehicle.

[0046] The specific operation steps of the control method in this embodiment are as follows Figure 5 Shown:

[0047] ①According to the various operating conditions of the engine noise in the vehicle, such as image 3 As shown, the amplitude parameters...

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Abstract

The invention relates to an active vehicle noise reduction control method and a system thereof. The control method includes the following steps that (1) a noise signal at a target position is read; (2) frequency parameters of engine noise are calculated according to an engine revolving speed signal, and phase parameters of the engine noise are extracted from the noise signal according to the frequency parameters; (3) amplitude parameters of the engine noise are obtained according to the engine revolving speed signal and a vehicle accelerator signal; (4) a noise reduction signal is generated according to the frequency parameters, phase parameters and amplitude parameters of the engine noise; and (5) the noise reduction signal in the step (4) is used for reducing the noise at the target position. According to the active vehicle noise reduction control method and the system thereof, the phase parameters of the engine noise are extracted from the noise signal, the engine amplitude parameters are obtained from the engine revolving speed signal and the vehicle accelerator signal, in this way, a logical algorithm can be simplified greatly, reaction time is shortened, no time difference between the noise reduction signal and the noise signal can be guaranteed, and the effect of active noise reduction is effectively ensured.

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 enhance the brand effect of the car. 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 inside the car. For pure electric passenger cars, because the motor noise is low, the drive Bridge noise has become the main factor affecting pure electric passenger vehicles. Therefore, for transmission passenger vehicles and pure electric passenger vehicles, reducing engine noise and drive axle gear noise can significantly improve the noise level in the vehicle and enhance the comfort of the vehicle. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R16/037
CPCB60R16/0373
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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