机械科学与技术2012，Vol.31Issue(1)：167-172,6.
一种紧凑型汽车座椅水平驱动器的声音品质识别
Sound Quality Evaluation of a Kind of Compact Horizontal Driver in Advanced Automobile Seats
王奇 1刘立君 2杨克己 1李峰 3何其皓3
作者信息
- 1. 浙江大学机械工程学系,杭州310027
- 2. 浙江大学宁波理工学院,宁波315100
- 3. 宁波双林集团汽车部件股份有限公司,宁波315153
- 折叠
摘要
Abstract
By analyzing sound signal,this paper analysis the sound signal of a kind of compact horizontal driver in advanced automobile seats to evaluate the sound quality.The sym6 wavelet was employed to de-noise given sound signal,and a band-pass filter was used to acquire specific frequency band of the de-noised signal.Hilbert transform was then adopted to demodulate filtered signal the main component of the demodulated signal was the characteristic signal containing fault information of the driver;consequently,a low-pass filter was utilized to eliminate high frequency noise and the anticipated signal containing fault information thus was acquired;fourier transform was performed for the low-pass filtered signal to obtain its frequency spectrum.Finally,the amplitude of the signal at characteristic frequency was compared with a preset threshold to determine if the driver was defective or of poor sound quality.This method had high detection accuracy and anti-noise ability over the whole frequency band.关键词
驱动器/声音信号/小波降噪/希尔伯特变换/解调Key words
driver/sound signal/wavelet de-noise/Hilbert transform/demodulate分类
机械制造引用本文复制引用
王奇,刘立君,杨克己,李峰,何其皓..一种紧凑型汽车座椅水平驱动器的声音品质识别[J].机械科学与技术,2012,31(1):167-172,6.
