Noise source recognition method for vehicle acceleration noise

An identification method and technology of noise sources, which are applied in the measurement of ultrasonic/sonic/infrasonic waves, measuring devices, instruments, etc., can solve the problems of inability to identify the noise source outside the vehicle and the vibration source of the noise source.

Inactive Publication Date: 2009-06-24
TSINGHUA UNIV
View PDF1 Cites 49 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This test does not collect the noise source and vibration source information on the vehicle, but mainly records the relationship between the acceleration noise outside the vehicle and the vehicle running speed and accelerator operation, so the identification of the noise source outside the vehic

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Noise source recognition method for vehicle acceleration noise
  • Noise source recognition method for vehicle acceleration noise
  • Noise source recognition method for vehicle acceleration noise

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] When identifying the noise of acceleration passing outside the vehicle specified by the national standard, it is necessary to collect the noise, vibration signal and driving information of the vehicle. In addition, it is necessary to collect the response point sound pressure signal of the monitoring position, the vehicle position signal, and the environmental signal on the ground. Wait.

[0038] In an embodiment of the present invention, a front-end rear-drive type automobile is subjected to an outside acceleration passing noise sound source identification test as an example to illustrate the collection process of various signals on the vehicle.

[0039] Use the acquisition device on the vehicle to collect the noise signal and vibration signal of each noise source and vibration source, and the driving information of the vehicle (such as engine speed, vehicle speed, throttle opening, etc., in the example, the engine speed signal is collected), and wireless transmission and r...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for indentifying a noise source that produces noise when a vehicle accelerates, and belongs to the technical field of vehicle noise control. The method comprises the following steps: when the vehicle accelerates or travels at a uniform speed, the noise source signal, the vibration source signal, the speed signal, the response point sound pressure signal, the vehicle position signal and the like are collected; the transfer function matrix from the noise source and the vibration source to the response point is calculated; the changing response point sound pressure during the process of acceleration is synthesized and computed; and the sensitivity and the contribution degree of each noise source and vibration source are calculated. The invention has the following advantages: the noise source signal, the vibration source signal, the vehicle travelling state signal, and the ground response point sound pressure signal, which are collected during the running of the vehicle, can be utilized for accurately identifying the noise source that produces noise during the acceleration; and the quantitative relationship between the response point noise signal and each noise source is obtained and can provide a reliable basis for the reduction of noise produced by the acceleration of a running vehicle.

Description

Technical field [0001] The invention relates to a method for identifying a noise source of vehicle acceleration noise, and belongs to the technical field of vehicle noise control. Background technique [0002] Automobile noise is the main source of noise pollution. Many countries, including my country, have formulated strict regulations to control automobile noise (such as my country’s recently formulated national standard GB1495-2002). The reduction of automobile noise is an important factor in the development of today’s automobile technology. The subject has received extensive attention from all countries and major vehicle manufacturers and parts companies in the world. Accurate identification of the sound source is the key to reducing the acceleration noise outside the car. [0003] The current noise testing, including ISO362 testing and acoustic holography testing, uses different devices and methods. The former is like B&K's PULSE system (Vehicle pass-by noise test, www.bksv....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01D21/02G01H11/00
Inventor 郑四发连小珉李克强郝鹏王彬星杨殿阁罗禹贡王建强
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap