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In this paper we deal with the ill-posed problems of whole-cycle ambiguities estimation by damped singular value decomposition (DSVD). First, we presented a singular normal equation matrix of whole-cycle ambiguities estimation, and then added synthetic noises to the right hand side to create two “noisy problems”. Second, we performed DSVD in conjunction with some parameter-choice approaches (e.g.,...
Wavelet multi-resolution (WMR) and a bandpass digital Butterworth Alter were both proposed to extract structural vibration signal embedded in noisy GPS observables. The noisy observables were simulated by artificially adding random noises to a de-noised GPS time series with the sampling rate of 5 Hz. Modal parameters such as frequency, damping ratio, and modal shape coefficient were identified by...
To improve insufficiently available satellite and solve the anomaly geometry, normal GPS system and its mentioned drawbacks are simulated. Based on the analysis of anomaly examples, singular value decomposition (SVD) is applied to settle the anomaly and its effect on precision is investigated. Then pseudolites with proper geometry are laid to increase the number of measurements and advance the geometry...
Many laboratory or indoor tests have revealed the advantages of the kinematic positioning of robotic tachemoeteric systems (RTS), and outdoor applications of the RTS kinematic positioning in the high dynamic tracking are still in study. An ambient vibration test with a Leica TCA2003 total station was conducted to study the feasibility in measuring the dynamic characteristics of cable-stayed bridges...
With the development of global positioning system (GPS) receiver technology for high recording rate, it allows reliable monitoring of engineering structures, such as bridges, towers and tall buildings. A structural monitoring system based on the technology of real-time kinematic GPS (RTK-GPS) is devised for the high pylon of a cable-stayed bridge. The vibration data are collected and processed by...
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