A relevant outcome of aircraft vulnerability assessment is the identification of the vulnerability importance of components for survivability design. However, when comparing the contribution of the components to the whole aircraft vulnerability, there is no accepted criterion regarding the component vulnerability. This work is aimed at investigating how importance measures in the field of reliability can be accounted for in the ranking of vulnerable components. The traditional importance measures (e.g., Birnbaum, Fussell–Vesely, criticality, reliability achievement worth, and reliability reduction worth) are modified to rank the component vulnerability. Three examples of increasing complexity are provided. Analysis shows that the traditional single-hit vulnerable area criterion is a special case among the proposed importance measures, and it can only apply for the nonredundant aircraft model with no component overlap; the importance measures can be applied to rank the component vulnerability of a complex aircraft (i.e., redundant aircraft model with component overlap). Another important aspect different from reliability analysis is that, in an overlap region, the change of the vulnerability of one component will probably lead to the change of the vulnerability of the shielded components, and in the process of computing the vulnerability importance measure metrics, this chain reaction should be considered.
Importance Measure Method for Ranking the Aircraft Component Vulnerability
Journal of Aircraft ; 51 , 1 ; 273-279
2013-11-06
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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