加速度基线漂移频域处理方法的对比研究

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (13) : 66-71.

论文

加速度基线漂移频域处理方法的对比研究

缪惠全，王闯，李杰

作者信息 +

Research on frequency domain processing methods of acceleration baseline drift

Miao Huiquan Wang Chuang Li Jie

Author information +

文章历史 +

摘要

针对加速度积分速度和位移中的基线漂移问题，对比研究了三种频域处理方法，即低频截止算法、低频衰减算法和基于滤波器的处理方法，分析了不同处理方法的原理、参数选择和校正效果，指出了不同方法存在的问题，并针对滤波器滤波所导致的数据弥散问题，提出了两种不同的改进方法，具有物理意义明确且操作简单的特点。通过对信号群延时的对比分析表明了该方法的有效性。研究表明，低频截止算法存在频率敏感性问题和信号突然截断所导致的能量泄露问题；低频衰减算法不同参数组合会产生相同的校正效果，参数缺乏明确的物理意义；滤波器尽管设计较为复杂且存在数据弥散问题，但采用本文的改进方法之后能够很好的改善信号的弥散问题，进而通过合理的参数选择能够较好的消除速度和位移基线的漂移问题。

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

关键词

基线漂移 / 低频截止 / 低频衰减 / 滤波器 / 相位延时 / 弥散

Key words

baseline drift

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

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缪惠全，王闯，李杰. 加速度基线漂移频域处理方法的对比研究[J]. 振动与冲击, 2016, 35(13): 66-71

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

参考文献

[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.