Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/20492
Title: An integrated GPS-accelerometer data processing technique for structural deformation monitoring
Authors: Chan, WS
Xu, YL 
Ding, XL 
Dai, WJ
Keywords: Accelerometer
Adaptive filter
Empirical mode decomposition (EMD)
GPS structural deformation monitoring
Integrated data processing
Static and dynamic displacements
Issue Date: 2006
Publisher: Springer
Source: Journal of geodesy, 2006, v. 80, no. 12, p. 705-719 How to cite?
Journal: Journal of geodesy 
Abstract: Global Positioning System (GPS) is being actively applied to measure 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 measurement. On 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 decomposition (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 position. The proposed data processing techniques are applied to the recorded GPS and accelerometer data to find both static and dynamic displacements. These results are compared with the actual displacement motions generated by the motion simulation table. The comparative results demonstrate that the proposed technique can significantly enhance the measurement accuracy of the total displacement of a structure.
URI: http://hdl.handle.net/10397/20492
ISSN: 0949-7714
EISSN: 1432-1394
DOI: 10.1007/s00190-006-0092-2
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