车辆悬架减振器引致的车内异响问题严重削弱了车内声品质，该异响声信号为非平稳信号且带宽特殊，致使传统的心理声学客观评价指标难以准确提取其异响特征信息。而小波分析作为一种有效的非平稳信号分析方法，能够有效克服心理声学客观评价指标的上述缺陷，经实践得以验证。但是由于经典的小波分析根植于特定基函数的叠加，导致单个基函数导出的小波函数族难以在不同尺度上准确地逼近局部信号特征。为此，在小波分析的基础上，结合经验模态分解（EMD）和Wigner-Ville分布的优点，并引入相关分析去噪的概念，提出并建立了新的减振器异响声品质评价参数SQCIMF-WVD（Sound Quality base on Choosing IMF and then proceed WVD），其与主观评价的相关系数进一步提高，更能准确反映减振器异响声品质的特点。
Abstract
The abnormal noise from vehicle suspension shock absorber compromises the vehicle interior sound quality seriously. And the traditional psychoacoustics index is difficult to extract the sound information characteristics accurately due to the abnormal noise signal is non-stationary and within a special bandwidth. As a kind of effective analysis method for non-stationary signal, However, the Wavelet Analysis can greatly overcome the defects of psychoacoustics mentioned above, which has been well proven in practice. Considering the classical Wavelet Analysis is dependent on the superposition of a certain basis function, it leads the wavelet functions to be difficult to approximate local signal signatures accurately at different scales. Therefore, on the basis of Wavelet Analysis, this paper introduces a newly developed abnormal noise objective sound quality index——SQCIMF-WVD(Sound Quality base on Choosing IMF and then proceed WVD), which not only combines the advantages from empirical mode decomposition(EMD) and Wigner-Ville distribution(WVD), but also brings in the correlated analysis noise reduction concept. The result shows that the correlation between subjective evaluation and the SQCIMF-WVD has been further improved, which can reflect the features of abnormal noise sound quality from the suspension shock absorber more accurately.
关键词
减振器异响 /
声品质 /
小波分析 /
经验模态分解 /
Wigner-Ville分布
{{custom_keyword}} /
Key words
shock absorber abnormal noise /
sound quality /
wavelet analysis /
Empirical Mode decomposition；Wigner Ville distribution
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1 ] Fouladi M H, Nahvi H, Ariffin A K. Index for vehicle acoustical comfort inside a passenger car [J]. Applied Acoustics,2008,69(4):343-353
[2 ] LEE H H, LEE S K. Objective evaluation of interior noise booming in a passenger car based on sound metrics and artificial neural networks [J]. Applied Ergonomics, 2009, 40(5)：860-869
[3 ] Redel-Macias MD, Rodriguez-Cantalejo RD, Pinzi S etal .Evaluation of sound quality in a tractor driver cabin based on the effect of biodiesel fatty acid composition [J]. FUEL, 2013.118(10):194-201
[4 ] Szatkowski, Antoni. Passenger vehicle hybrid hydraulic powertrain sound quality investigation [C]// SAE International. SAE 2013 Noise and Vibration Conference and Exhibition. May 20-23, 2013. SAE International, 400 Common wealth Drive, Warrendale, PA 15096-0001, United States.
[5 ] KIM E Y, Shin T J, Lee S K. New tonality design for non-stationary signal and its application to sound quality for gear whine sound [J]. Journal of Automobile Engineering, 2013,227(3): 311-322.
[6 ] 杨 川，于德介. 基于伪Wigner-Ville分布的汽车关门声品质评价参数研究[J]. 机械工程学报，2011，47(24)：91-96.
YANG chuan，YU Dejie. Research on the Sound Metric of Door Slamming Sound Based on Pseudo WIGNER- VILLE Distribution [J]. JOURNAL OF MECHANICAL ENGINEERING, 2011, 47(24):91-96.
[7 ] 宋睿. 汽车双筒式减振器异响的产生机理与控制方法研究[D]. 成都：西南交通大学，2012.
SONG Rui. Experimental research on Automobile shock absorber sound production mechanism and control method[D]. Cheng Du: Southwest JiaoTong University, 2012.
[8 ] 张立军，余卓平，靳晓雄等. 减振器异常噪声的试验研究与分析[J]. 振动与冲击，2002，21（1）：33-38.
Zhang Lijun，Yu Zhuoping，Jin Xiaoxiong，et al. EXPERIMENTAL RESEARCH ON THE ABNORMAL NOISE OF HYDRAULIC SUSPENSION SHOCK ABSORBER[J]. Journal of Vibration and Shock, 2002，21（1）：33-38.
[9 ] ZWICKER E, FASTI H. Psychoacoustics：Facts and models [J]. Journal of Sound and Vibration, 1991, 148(3)：530-531.
[10 ] 毛东兴. 声品质研究与应用进展[J]. 声学技术，2007，6-11.
MAO Dongxin. Progress in sound quality research and application[J]. Technical Acoustics, 2007, 6-11.
[11 ] 宋睿，丁渭平，杨明亮等. 汽车悬架减振器结构传递异响的试验研究[J]. 汽车技术，2011，39-42
SONG Rui，DING Weiping，YANG Mingliang，et al. Experimental research on structure transfer sound of Automobile suspension shock absorber [J]. Automobile Technology，2011,39-42
[12 ] 向玲，唐贵基，胡爱军. 旋转机械非平稳振动信号的时频分析比较[J]. 振动与冲击，2010,29（2）:42-45.
XIANG Ling，Tang Guiji，Hu ai-jun. Vibration signal time-frequency analysis and comparison for a rotating machinery[J]. Journal of Vibration and Shock, 2010, 29(2):43-45
[13 ] 蔡艳平，李艾华，王涛等. 基于EMD-Wigner-Ville的内燃机振动时频分析[J]. 振动工程学报，2010，24（3）:430-437.
CAI Yanping, LI Aihua, WANG Tao, et al. Engine vibration time-frequency analysis based on EMD-Wigner- Ville[J]. Journal of Vibration Engineering, 2010, 23(4):430-457.
[14 ] 王宏禹，邱天爽，陈喆. 非平稳随机信号分析与处理（第二版）[M]，国防工业出版社. 2008.
WANG Hongyu，QIU Tianshuang，CHEN Zhe. Non-stationary Random Signal Analysis and Processing (Second Edition)[M]. National Defense Industry Press. 2008.
[15 ] 胡爱军，孙敬敬，向玲. 经验模态分解中的模态混叠问题[J]. 振动、测试与诊断，2011,31(4)：429-434.
HU Aijun,, SUN Jingjing, XIANG Ling. Mode Mixing in Empirical Mode Decomposition[J]. Journal of Vibration Measurement & Diagnosis, 2011,31(4)：429-434.
[16 ] 陈志新. 脉冲噪声环境中基于FLOWVD的机械设备故障时频监测方法[J]. 振动与冲击，2013，32(10):136-140.
CHEN Zhixin. Time-frequency monitoring on machinery in impulsive noise environment based on fractional lower order Winger-Ville distribution [J]. Journal of Vibration and Shock, 2013, 32(10):136-140
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(2309 KB)
