Abstract:

Aiming at the deficiency of existing ranking methods on security risk, a method based on fault tree analysis (FTA) and least square support vector machine (LS-SVM) is proposed, which can be used in quantitative safety ranking of the components for aircraft. The fault tree is denoted by Boolean formula firstly, and the effect parameter for failure is acquired according to probability importance degree. And then the hazard ranking of components for aircraft is calculated based on LSSVM. Its application shows that the proposed method can adequately validate the effect of aeronautic components on flight security.