Inversion of Material Parameters of Composite Fiberglass Box Structure

Hui Chen; Feng Wang; Hua Liu; Jian Zhang

doi:10.4028/www.scientific.net/AMR.1095.258

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1095Inversion of Material Parameters of Composite...

Inversion of Material Parameters of Composite Fiberglass Box Structure

Abstract:

For composite fiberglass box structure, the approximation equations of Kalman filtering processor was studied. The necessary observation revision equation and Kalman regenerative matrix were derived. The determinations of the initial values of material parameters and the error covariance matrix were solved. The Kalman filtering steps of material parameters of composite fiberglass box structure were presented and the analytical procedure was compiled. From results of typical examples, it is indicated that the Kalman filtering processes are steady and convergent to the true values when the initial filtering values are properly selected, which demonstrates that the analytical method is correct and the developed procedure are reliable. The Kalman filtering processes of material parameters are quite dependent on the determination of initial filtering values, which indicates that the initial filtering values should be set with practical engineering experiences instead of arbitrary selection.