摘要
针对目前危险性分级方法的不足,提出了基于故障树分析(fault tree analysis,FTA)与最小支持向量机(least square support vector machine,LS-SVM)的航空部件危险性定量分级方法。首先通过布尔代数法对FTA进行逻辑描述,采用概率重要度表示部件失效的后果严重程度,在此基础上通过LS-SVM对航空部件的危险性进行分级。实例证明,该方法能够准确地反映航空部件对飞行安全的影响。
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.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2011年第11期2445-2448,共4页
Systems Engineering and Electronics
基金
'十二五'国防预研基金资助课题
关键词
危险性分级
故障树
最小支持向量机
航空部件
risk ranking
fault tree （FTA）
least square support vector machine （LS-SVM）
aeronautic component
