摘要
针对困扰工程使用的软件积分在加速度积分为速度和位移时的误差原因进行详细分析,并且汇总提出一些相应的改进方法。将高通滤波、分段多项式拟合以及经验模态分解(empiricalmodedecomposition)技术应用于消除数值积分的误差影响,并详细论述各种处理方法的优缺点。用巴东大桥实测的地脉动数据进行数值积分处理,取得满意的积分效果,说明文中消除趋势项的方法是有效可行的。
The cause of the errors brought by the software integral that troubles the engineering application for measuring velocity and displacement is analyzed in detail, Some corresponding improved methods are summarized. High-pass filter, piecewise polynomial fitting and empirical mode decomposition（EMD） are applied to eliminate the error effect of numerical integral and their corresponding merits and demerits are detailedly reviewed. The satisfying integral effects for the numerical integral of Badong bridge earth pulsation data show that the proposed method to removal of trends is effective.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2006年第3期419-423,共5页
Journal of Mechanical Strength
基金
科技部科技型中小企业技术创新基金(05C26213100459)
江苏省软件和集成电路产业专项经费项目(桥梁建筑物安全与健康检测平台软件)资助。~~
关键词
数值积分
趋势项
高通滤波
分段多项式拟合
经验模态分解技术
Numerical integration
Trend
High pass filter
Piecewise polynomial fitting
Empirical mode decomposition
