Dam deformation monitoring data analysis using space-time Kalman filter

Authors: Dai, Wujiao; Ning, Liu; Santerre, Rock; Pan, Jiabao
Abstract: Noise filtering, data predicting, and unmonitored data interpolating are important to dam deformation data analysis. However, traditional methods generally process single point monitoring data separately, without considering the spatial correlation between points. In this paper, the Space-Time Kalman Filter (STKF), a dynamic spatio-temporal filtering model, is used as a spatio-temporal data analysis method for dam deformation. There were three main steps in the method applied in this paper. The first step was to determine the Kriging spatial fields based on the characteristics of dam deformation. Next, the observation noise covariance, system noise covariance, the initial mean vector state, and its covariance were estimated using the Expectation Maximization algorithm (EM algorithm) in the second step. In the third step, we filtered the observation noise, interpolated the whole dam unmonitored data in space and time domains, and predicted the deformation for the whole dam using the Kalman filter recursion algorithm. The simulation data and Wuqiangxi dam deformation monitoring data were used to verify the STKF method. The results show that the STKF not only can filter the deformation data noise in both the temporal and spatial domain effectively, but also can interpolate and predict the deformation for the whole dam
Document Type: Article de recherche
Issue Date: 8 December 2016
Open Access Date: 9 December 2016
Document version: VoR
Permalink: http://hdl.handle.net/20.500.11794/12728
This document was published in: ISPRS International Journal of Geo-Information, Vol. 5 (12), 236-251 (2016)
https://doi.org/10.3390/ijgi5120236
International Society for Photogrammetry and Remote Sensing, issuing body
Alternative version: 10.3390/ijgi5120236
Collection:Articles publiés dans des revues avec comité de lecture

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