英文翻译.GPS.doc

毕业设计(论文)
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An integrated GPS–accelerometer data processing technique
for structural deformation monitoring
W. S. Chan · Y. L. Xu · X. L. Ding · W. J. Dai
Received: 9 November 2005 / Accepted: 11 August 2006 / Published online: 7 September 2006© Springer-Verlag 2006
Abstract Global Positioning System (GPS) is being actively applied tomeasure static and dynamic displacement responses of large civil engineering structures under winds. However, multipath effects and low sampling frequencies affect the accuracy of GPS for displacement the other hand, accelerometers cannot reliably measure static and low-frequency structural responses, but can accurately measure high frequency structural responses. Therefore, this paper explores the possibility of integrating GPS-measured signals with accelerometer-measured signals to enhance the measurement accuracy of total (static plus dynamic) displacement response of a structure. Integrated data processing techniques using both empirical mode position (EMD) and an adaptive filter are presented. A series of motion simulation table tests are then performed at a site using three GPS receivers, one accelerometer, and one motion simulation table that can simulate various types of motion defined by input wave time histories around a pre-defined static proposed data processing techniques are applied to the recorded GPS and accelerometer data to find both static and dynamic displacements. These results pared with the actual displacement motions generated by the motion simulation table. parative results demonstrate that the proposed technique can significantly enhance the measurement accuracy of the total displacement of a structure.
Keywords:GPS structural deformation monitoring ・Accelerometer ・ Integrated data processing ・ Static and dynamic displacements ・ Empirical mode position (EMD) ・ Adaptive filter
1 Introduction
Structural displacement is a key parameter to assess the