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Rapid Soil Displacements from MEMs Accelerometers
The use of measured accelerations to derive ground displacements can result in large signal drift during numerical integration. To overcome this, a digital high pass filter based on Frequency-sampling Design is proposed to attenuate the drift. The filter is benchmarked against other methods in small (< 3 mm) and large displacement (> 5 mm) testing. The proposed algorithm results in calculated displacements that have a very small discrepancy from measured displacements for both the small and large displacements respectively. The performance of the MEMs accelerometers are found to compare favourably with traditional piezoelectric technology. The implementation of a MEMs based ground array to detect the geometry of soil failure mechanism associated with foundation uplift was successful. The peak displacements derived from the measured accelerations corroborate with the laser displacement measurements with an error less than 10%.
Rapid Soil Displacements from MEMs Accelerometers
The use of measured accelerations to derive ground displacements can result in large signal drift during numerical integration. To overcome this, a digital high pass filter based on Frequency-sampling Design is proposed to attenuate the drift. The filter is benchmarked against other methods in small (< 3 mm) and large displacement (> 5 mm) testing. The proposed algorithm results in calculated displacements that have a very small discrepancy from measured displacements for both the small and large displacements respectively. The performance of the MEMs accelerometers are found to compare favourably with traditional piezoelectric technology. The implementation of a MEMs based ground array to detect the geometry of soil failure mechanism associated with foundation uplift was successful. The peak displacements derived from the measured accelerations corroborate with the laser displacement measurements with an error less than 10%.
Rapid Soil Displacements from MEMs Accelerometers
Conf.Proceedings of Society
Caicedo, J.M. (editor) / Catbas, F.N. (editor) / Cunha, A. (editor) / Racic, V. (editor) / Reynolds, P. (editor) / Salyards, K. (editor) / Levy, F. M. (author) / Richards, D. J. (author)
2012-03-06
12 pages
Article/Chapter (Book)
Electronic Resource
English
Rapid Soil Displacements from MEMs Accelerometers
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