Crosstalk elimination method in OTPA using sensors’ combination

WU Xianjun

Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (17) : 10-15.

PDF(869 KB)
PDF(869 KB)
Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (17) : 10-15.

Crosstalk elimination method in OTPA using sensors’ combination

  • WU Xianjun
Author information +
History +

Abstract

Transfer path analysis (TPA) is an effective method to analyze contributions of noise sources. A new TPA called the operational transfer path analysis (OTPA) does not need to measure force, but only needs to measure response for completing measurement and analysis of noise source contribution on-line under operational condition of a power unit. However, crosstalk has a great impact on response measurement accuracy. Here, a crosstalk elimination method in OTPA using sensors’ combination was proposed. Sensors were arranged near vibration sources, and signals measured with sensors were combined in frequency domain to express the sensor signal near a certain source. Through step operation, vibration and noise data near each source were measured and used to establish equations. Combination coefficients were obtained by solving equations when the combined signal of the sensor near a certain source was zero and it was caused by other sources. Linear combination of sensor signals was taken as the reference source’s signal to join OTPA. Then crosstalk was eliminated or reduced to correctly obtain contributions of various sources. Simulation of two sound sources and a plate test of two vibration sources showed that the crosstalk elimination method using sensors’ combination can improve identification accuracy of excitation sources. Finally, effects of sensor number were discussed.

Key words

transfer path analysis(TPA) / crosstalk / contribution / operational transfer path analysis (OTPA)

Cite this article

Download Citations
WU Xianjun. Crosstalk elimination method in OTPA using sensors’ combination[J]. Journal of Vibration and Shock, 2020, 39(17): 10-15

References

[1]吴跃卿, 张占一, 周永才. 冰箱侧壁振动传递路径分析试验研究[J]. 噪声与振动控制, 2018, 38(S1):449-452.
WuYueqing , Zhang Zhanyi , Zhou Yongcai.Experimental Study on Vibration Transfer Path Analysis (TPA) of Refrigerator[J].Noise and Vibration Control,2018, 38(S1):449-452.
[2]谭晶晶, 杜建科, 李洪亮, et al. 基于传递路径分析的乘用车路面噪声优化控制[J]. 汽车技术, 2017(3):19-23.
Tan Jingjing, Du Jianke, Li Hongliang, Su Lili, Xia Hongbin.Passenger Car Road Noise Optimization and Control based on Transfer Path Analysis[J]. Automobile Technology,2017(3):19~23.
[3]Magrans F X . Method of measuring transmission paths[J]. Journal of Sound and Vibration, 1981, 74(3):321-330.
[4] De Klerk D , Ossipov A . Operational transfer path analysis: Theory, guidelines and tire noise application[J]. Mechanical Systems & Signal Processing, 2010, 24(7):1950-1962.
[5] Gajdatsy P , Janssens K , Desmet W , et al. Application of the transmissibility concept in transfer path analysis[J]. Mechanical Systems & Signal Processing, 2010, 24(7):1963-1976.
[6] Janssens K , Gajdatsy P , Gielen L , et al. OPAX: A new transfer path analysis method based on parametric load models[J]. Mechanical Systems & Signal Processing, 2011, 25(4):1321-1338.
[7]陈剑 , 邓支强 , 曾维俊 , et al. 基于扩展工况传递路径分析的驾驶室振动传递路径二级建模应用研究[J]. 振动与冲击, 2018,37(3) :72~78,90.
Chen Jian,Deng Zhiqiang,ZengWeijun,Shu Hongchao,Li Shiai,RongFangming.Transfer path two-level modeling for cab vibration based on OPAX method[J].Journal of Vibration and Shock,2018, 37(3):72~78,90.
[8]杨旭, 李冰, 陈少江. 传递路径分析方法用于农用车振动控制的研究[J]. 机械设计与制造, 2018(4): 33-36.
Yang Xu,Li Bing,Chen Shaojiang.Research on Transfer Path Analysis Method on Vibration Control of Agricultural Vehicles[J].Machinery Design & Manufacture,2018, 2018(4): 33-36.
[9] David Lennström, Frédéric Wullens, Olsson M , et al. Validation of the blocked force method for various boundary conditions for automotive source characterization[J]. Applied Acoustics, 2016, 102:108-119.
[10] Guasch O . Direct transfer functions and path blocking in a discrete mechanical system[J]. Journal of Sound & Vibration, 2009, 321(3):854-874.
[11]屠翔宇, 蒋伟康, 朱志勇, et al. 乘用车油箱的燃油晃动噪声工况传递路径分析[J]. 振动与冲击, 2017(18):189-193.
Tu Xiangyu,Jiang Weikan,Zhu Zhiyon, et al. Operational transfer path analysis on the fuel tank sloshing noise of automotives[J]. Journal of Vibration and Shock,2017(18):189-193.
[12]胡涵, 史正文, 闫鹏, et al. OTPA方法在压路机驾驶室振动分析上的应用[J]. 噪声与振动控制, 2018, 38(S1):143-145.
Hu Han, Shi Zhengwen, Yan Peng, Mi Yongzhen, ZhengHui.Application of Operational Transfer Path Analysis on Vibration Analysis of Roller’s Cab[J].Noise and Vibration Control, 2018, 38(S1):143-145.
[13]刘念斯, 张志达, 陈玮, et al. OTPA结合传函分析在路噪研究中的应用[J]. 科学技术与工程, 2017,17(12):14-20.
Liu Niansi,Zhang Zhida,Chen Wei,Bi Jinyan.Application of OTPA and Transfer Function Analysis in the Research of Road Noise.Science Technology and Engineering.2017,17(12):14-20.
[14] 仲典, 蒋伟康. 工况传递路径分析用于辨识车内噪声源[J]. 噪声与振动控制, 2016,36(3):110~114,146.
Zhong Dian,Jiang Weikang.Identification of Vehicle’s Interior Noise Sources by Using Operational Transfer Path Analysis[J].Noise and Vibration Control,2016,36(3):110~114,146.
[15]伍先俊, 吕亚东, 隋富生. 工况传递路径分析法原理及其应用[J]. 噪声与振动控制, 2014, 34(1):28-31.
Wu Xianjun,Lv Yadong,Sui Fusheng.Basic theory of operational transfer path analysis and its application[J].Noise and Vibration Control,2014, 34(1):28-31.
[16]成玮, 卢英英, 陆建涛, et al. Tikhonov正则化在运行工况传递路径分析的应用[J]. 振动、测试与诊断, 2017,37(1):57~64,199.
Cheng wei,Lu Yingying,Lu Jiantao,Zhang Zhousuo.Tikhonov Regularization for Operational Transfer Path Analysis[J].Journal of Vibration,Mearsurement & Diagnosis.2017,37(1):57~64,199.
[17] Gajdatsy P, Janssens K, Gielen L, et al. Critical assessment of operational path analysis: mathematical problems of transmissibility estimation[J]. Journal of the Acoustical Society of America, 2008, 123(5):38~69.
[18]董建超, 杨铁军, 李新辉, et al. 主分量分析在激励源识别中的应用研究[J]. 振动与冲击, 2013, 32(24):157-163.
Dong Jianchao,Yang Tiejun,Li Xinhui, et al.Applications of principal component analysis in excitation source identification[J].Journal of Vibration and Shock,2013, 32(24):157-163.
PDF(869 KB)

377

Accesses

0

Citation

Detail

Sections
Recommended

/