基于改进证据理论的导弹状态评价方法

 为研究导弹状态评价方法,将导弹的状态分为优、良、中、差和故障5个等级。若一个或多个状态参数测试不合格,可以直接判定导弹处于故障状态;若所有状态参数测试均合格,表明导弹是合格的。对于测试合格的导弹,在评价特征参数状态的基础上,构建了基于改进证据理论的导弹状态评价模型,对所有特征参数的状态合成并决策,确定了测试合格的导弹的状态退化等级。针对利用证据理论在合成状态特征参数过程中的冲突分配问题,在分析现有改进证据理论方法的基础上,采用将全局冲突细分为局部冲突并按照冲突焦元值权重分配的方法,对证据理论进行了改进,通过实例分析,验证了改进方法的有效性。

Missile Condition Assessment Based on Improved Evidence Theory

The method of missile condition assessment is researched. Missile condition is classified into five types: excellent, good, middle, poor and fault. If one or more characteristic parameters are unqualified, the missile condition is directly judged to be fault. If all characteristic parameters are qualified, the missile is qualified. To the qualified missile, a model of missile condition assessment based on an improved evidence theory is developed and the condition degradation grading of missile could be obtained by synthesizing the condition of all analog monitoring parameters on the basis of assessing characteristic parameter conditions. In order to use evidence theory to deal with conflict assignments in the process of synthesizing characteristic parameters, evidence theory is improved by using subdividing global conflicts into local conflicts and assigning conflicts according to the weight of conflict elements on the basis of analyzing improved evidence theories at present. Finally, the experimental result validates the rationality of the improved method.