ROC and Cost Curves for SHM Performance Characterization in a Multilevel Damage Classification Framework: Application to Impact Damage in Aircraft Composites Structures

摘要

In this paper, the optimization of maintenance schemes for aircraft structures is treated by a Bayesian updating approach. A built-in structural health monitoring system for multilevel damage detection based on ultrasonic guided waves is considered. Statistical evaluation of the SHM performances are dealt by means of multi-class ROC analysis, probability of detection and false alarm maps. Two methods, based on the minimization of the service life cost statistics are implemented. An application on a square panel of side 1.2m subjected to random impacts is considered.