Publication :


Title:

Paris law parameter identification based on the Extended Kalman Filter

Authors: C. Melgar, M. Gomez-jimenez, L. Cot, S. Dejean, C. Mabru and J. Martinez-vega
Year: novembre 2016
Proceedings de : MATEC Web Conf. Volume 83, 2016 CSNDD 2016 - International Conference on Structural Nonlinear Dynamics and Diagnosis .
Pages 03003

DOI: 10.1051/matecconf/20168303003

Abstract:
Aircraft structures are commonly subjected to repeated loading cycles leading to fatigue damage. Fatigue data can be extrapolated by fatigue models which are adopted to describe the fatigue damage behaviour. Such models depend on their parameters for accurate prediction of the fatigue life. Therefore, several methods have been developed for estimating the model parameters for both linear and nonlinear systems. It is useful for a broad class of parameter identification problems when the dynamic model is not known. In this paper, the Paris law is used as fatigue-crack-length growth model on a metallic component under loading cycles. The Extended Kalman Filter (EKF) is proposed as estimation method. Simulated crack length data is used to validate the estimation method. Based on experimental data obtained from fatigue experiment, the crack length and model parameters are estimated. Accurate model parameters allow a more realistic prediction of the fatigue life, consequently, the remaining useful life (RUL) of component can be accurately computed. In this sense, maintenance performance could be improved.

Bibtex citation :
@INPROCEEDINGS{Melgar2016,
Author={Melgar, C. and Gomez-jimenez, M. and Cot, L. and Dejean, S. and Mabru, C. and Martinez-vega, J.},
Title={Paris law parameter identification based on the Extended Kalman Filter},
Booktitle={ MATEC Web Conf. Volume 83, 2016 CSNDD 2016 - International Conference on Structural Nonlinear Dynamics and Diagnosis },
Pages={ 03003},
Year={2016}}


INSTITUT CLEMENT ADER, 3, rue Caroline Aigle F-31400 Toulouse, France.
Livraisons : +33 (0)5 61 17 10 07
Secrétariat ICA: +33 (0)5 61 17 10 85 ou +33 (0)5 61 17 10 82
Fax : +33 (0)5 61 17 10 80