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- W1508823657 abstract "In pavement engineering, good estimation of layer moduli from nondestructive method is important for scheduling rehabilitation plan. Although many back calculation methods have been developed, some of them are highly sensitive to seed values and sometimes yield unreasonable results. For this reason, a new method based on constrained Extended Kalman Filter (EKF) is proposed for back-calculating layer moduli. In numerical example with layer elastic model, it is found that the proposed method converges to true layer moduli with high accuracy in three, four, and five layer pavements and with very different seed values. The constrained EKF method is then applied to back calculation of layer moduli using actual falling weight deflectometer (FWD) data. It is shown that the proposed constrained EKF method is able to find reasonable layer moduli that fit surface deflection very well. Further more, the back-calculation results do not depend on seed values for most cases even when subgrade is treated as non-linear material." @default.
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- W1508823657 date "2007-01-01" @default.
- W1508823657 modified "2023-09-23" @default.
- W1508823657 title "Application of Constrained Extended Kalman Filter in Layer Moduli Backcalculation" @default.
- W1508823657 hasPublicationYear "2007" @default.
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