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Identification strategy in the presence of corrupted measurements

2005; Emerald Publishing Limited; Volume: 22; Issue: 5/6 Linguagem: Inglês

10.1108/02644400510602989

1758-7077

Olivier Allix, Pierre Feissel, H.M. Nguyen,

Ultrasonics and Acoustic Wave Propagation

Abstract Purpose – To propose and develop an identification method of material parameters from dynamics test in the presence of extensively corrupted measurements. Design/methodology/approach – The method we propose, which is based on the use of the error in constitutive relation for identification problems in the framework of transient dynamics, leads to nonstandard wave propagation problems. For solving this numerical difficulty, we used the transition matrix method for short‐duration tests and the combined Riccati constant/transition matrix approach for long‐duration tests. Findings – A numerical strategy adapted to the problem. Results obtained appears to be insensitive to perturbation of measurements up to a very high level of perturbation. Research limitations/implications – Only simple case of elastic bar have been treated so far. Originality/value – Without any a priori information on the level of perturbation, this method is robust with respect to the perturbation. A coupling of two resolution methods allows to deal with problem of arbitrary duration.