| GPS多路径效应影响与结构振动的小波滤波筛分研究 |
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| 引用本文： | 黄丁发,丁晓利,陈永奇,龚涛,熊永良.GPS多路径效应影响与结构振动的小波滤波筛分研究[J].测绘学报,2001,30(1):36-41. |
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| 作者姓名： | 黄丁发 丁晓利 陈永奇 龚涛 熊永良 |
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| 作者单位： | 1. 西南交通大学，四川 成都 610031
2. 香港理工大学，香港九龙 |
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| 基金项目： | 国家自然科学基金项目(49771062) |
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| 摘 要： | 当应用GPS技术进行大型工程结构监测时，由于其测定的是监测点的绝对位移，且受到诸多因素的影响，其中多路径效应和温度变化是主要影响源，要想正确分析结构的动力特性，首先必须有效地分离结构振动与各类影响项。本文采用小波分析法，对坐标序列进行多尺度分解，有效地筛分出结构微小振动和各类影响项。通过实际测试数据分析，取得了极其满意的效果。
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| 关 键 词： | 结构振动测试 多路径效应 小波分析 坐标序列 GPS技术 多尺度分解 |
| 文章编号： | 1001-1595(2001)01-0036-06 |
Wavelet Filters Based Separation of GPS Multi-path Effects and Engineering Structure Vibrations |
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| HUANG Ding-fa,DING Xiao-li,CHEN Yong-qi,GONG Tao,XIONG Yong-liang.Wavelet Filters Based Separation of GPS Multi-path Effects and Engineering Structure Vibrations[J].Acta Geodaetica et Cartographica Sinica,2001,30(1):36-41. |
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| Authors: | HUANG Ding-fa DING Xiao-li CHEN Yong-qi GONG Tao XIONG Yong-liang |
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| Institution: | HUANG Ding-fa1,DING Xiao-li2,CHEN Yong-qi2,GONG Tao1,XIONG Yong-liang1 |
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| Abstract: | The recent advances in GPS technology recording at 20 samples per second allows reliable monitoring of engineering structure, such as suspension or cable-stayed bridges and tall buildings. But the coordinates conducted from GPS trajectory estimator (i.e. epoch by epoch) usually are affected by many factors, e.g. multi-path and temperature as major. To assess stress and drift conditions of engineering structure one have to separate structure vibrations from other biases. The Wavelet analysis technique has been successfully used for this purpose, and the analysis results from practical data are presented. |
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| Keywords: | GPS vibration monitoring of engineering structure multi-path wavelet analysis |
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