| 基于PCA及提升小波组合算法提取建筑物结构振动信号 |
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| 引用本文： | 吴丰波,岳国森,梁敬祖,李业坤,董显富.基于PCA及提升小波组合算法提取建筑物结构振动信号[J].大地测量与地球动力学,2016,36(9):808-812. |
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| 作者姓名： | 吴丰波 岳国森 梁敬祖 李业坤 董显富 |
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| 摘 要： | 针对监测结果受测量噪声和多路径等GPS误差影响的问题，提出基于PCA及提升小波的组合算法来提取建筑物结构振动信号。利用PCA空间滤波分离区域站点相关的共模误差，然后利用提升小波变换对振动信号进行降噪，用于提取结构振动信号。以香港某高楼在台风荷载作用下的观测数据为例进行实验，结果表明，此算法有效提高了变形监测的精度。
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| 关 键 词： | GPS监测 PCA 提升小波 建筑物结构振动 信号提取 |
A Combination Algorithm Based on PCA and Lifting Wavelet to Extract Vibration Signal of Building Structure |
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| WU Fengbo,YUE Guosen,LIANG Jingzu,LI Yekun,DONG Xianfu.A Combination Algorithm Based on PCA and Lifting Wavelet to Extract Vibration Signal of Building Structure[J].Journal of Geodesy and Geodynamics,2016,36(9):808-812. |
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| Authors: | WU Fengbo YUE Guosen LIANG Jingzu LI Yekun DONG Xianfu |
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| Abstract: | In order to weaken the influence of GPS errors in vibration monitoring results affected by measurement noise and multipath etc. in the deformation monitoring of buildings, a combined algorithm based on PCA and lifting wavelet transformation is proposed. The PCA spatial filtering method is used to separate the common-mode error, which eliminates the inter-station correlated error. Then, the lifting wavelet transformation is used to de-noise the building structure vibration signal, which is then used to extract structural vibration signals. Taking a tall building in Hong Kong as an example, the results show that the algorithm can effectively improve the accuracy of deformation monitoring. |
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| Keywords: | GPS monitor PCA lifting wavelet building structure vibration signal extraction |
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