Research on frequency domain processing methods of acceleration baseline drift

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (13) : 66-71.

Miao Huiquan Wang Chuang Li Jie

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Abstract

Aiming at the the baseline drift problem of velocity and displacement integrated from acceleration, this paper studied three kinds of frequency domain processing methods, namely low frequency cut-off algorithm, low frequency attenuation algorithm and the method based on filter , and analyzed the different theorems, parameters choice, correction effects, and the existing problems of different processing methods. At he same time, against the filter dispersion, this paper suggested two kinds of improved methods, owning the characteristics of clearly physical meaning and simple operation. The analysis of signal group delay showed the method was effective. Studies showed that the low frequency cut-off algorithm had the problem of frequency sensibility and energy leak problem caused by sudden truncation. The low frequency attenuation algorithm had the problem that different parameters combination could produce the same correction effect and the parameters lacked clear physical meaning. The method based on filter might be more complicated and cause signal dispersion, but by using the improved methods suggested by this paper could improve the signal dispersion well, and then through the reasonable parameters selection could eliminate the baseline drift problem of velocity and displacement.

Key words: baseline drift ; low frequency cut-off; low frequency attenuation; filter; phase delay; dispersion

Key words

baseline drift

/ low frequency cut-off / low frequency attenuation / filter / phase delay / dispersion

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Miao Huiquan Wang Chuang Li Jie. Research on frequency domain processing methods of acceleration baseline drift[J]. Journal of Vibration and Shock, 2016, 35(13): 66-71

References

[1] Converse A, Brady A G. BAP: basic strong-motion accelerogram processing software, version 1.0[M]. Colorado: US Department of the Interior, US Geological Survey, 1992.
[2] Boore D M, Bommer J J. Processing of strong-motion accelerograms: needs, options and consequences[J]. Soil Dynamics and Earthquake Engineering, 2005, 25(2): 93-115.
[3] 于海英, 江汶乡, 解全才, 等. 近场数字强震仪记录误差分析与零线校正方法[J]. 地震工程与工程振动, 2009, 29(6): 1-12.
YU Hai-ying, JIANG Wen-xiang, XIE Quan-cai, et al. Baseline correction of digital strong- motion records in near field[J]. Journal of Earthquake Engineering and Engineering Vibration, 2009, 29(6): 1-12.
[4] 郑水明, 周宝峰, 温瑞智, 等. 强震动加速度记录基线校正问题探讨[J]. 大地测量与地球动力学, 2010, 30(3): 47-50.
ZHENG Shui-ming, ZHOU Bao-feng, WEN Rui-zhi, et al. Discussion on baseline correction of strong motion data[J]. Journal of Geodesy and Geodynamics, 2010, 30(3): 47-50.
[5] Douglas J, Boore D M. High-frequency filtering of strong-motion records[J]. Bulletin of Earthquake Engineering, 2011, 9(2): 395-409.
[6] 程佩青. 数字信号处理教程[M]. 北京市: 清华大学出版社, 2001.
[7] 周英杰. 加速度测试积分位移算法及其应用研究[D]. 重庆：重庆大学, 2013.
ZHOU Ying-jie, A study on integral algorithm for acceleration test to get displacement and application[D]. Chongqing: Chongqing University, 2013
[8] Hong Y H, Kim H K, Lee H S. Reconstruction of dynamic displacement and velocity from measured accelerations using the variational statement of an inverse problem[J]. Journal of Sound and Vibration, 2010, 329(23): 4980-5003.
[9] 江志红. 深入浅出数字信号处理[M]. 北京: 北京航空航天大学出版社, 2012
[10] 纪跃波, 秦树人, 汤宝平. 零相位数字滤波的方法与实现[J]. 振动. 测试与诊断, 2000 (z1): 167-172.
JI Yue-bo, QIN Shu-ren, TANG Bao-ping. The method and realization of zero phase digital filter[J]. Journal of Vibration, Measurement & Diagnosis, 2000 (z1): 167-172.