Techniques in numerical differentiation of experimentally noisy data

Lopes, Hernani; Guedes, Rui M.; Vaz, M.A.P.

http://hdl.handle.net/10198/4506

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Authors

Lopes, Hernani

Guedes, Rui M.

Vaz, M.A.P.

Abstract(s)

A comparison of different methodologies for spatial differentiation of experimental noisy data is presented. The transient displacement fields resulting from bending wave propagation on aluminum plate were measured with pulse TV-holography. A new method to perform the numerical spatial differentiation and a strategy for dealing with the border problem are presented. The method here presented results for the third order derivative and showed to be superior to the other methods tested. A good agreement between the new method and the Finite Elements Method was achieved.

Keywords

Numerical differentiation Experimental data Noisy data

URI

http://hdl.handle.net/10198/4506

Citation

Lopes, H.; Guedes, R. M.; Vaz, M.A.P. (2006). Techniques in numerical differentiation of experimentally noisy data. In 5th International Conference of Mechanical & Materials in Design. Porto, Portugal. p.27-28.