一种简单有效的处理冲突证据的D-S改进方法

摘要

D-S evidence theory is widely applied to decision-level information fusion, but the combination result will disaccord with intuition when combining conflict evidences.Through analyzing the unavailability and its reason in depth,a simple and efficient improved method is put forward.The method integrates the subjective weight and objective weight as belief degree of evidences in order to find conflict evidences and discount them, which makes the combination result rapidly converging to fight types.The simulation result shows that, comparing with the existing methods, the proposed method is very adaptable to the situation having fewer conflict evidences, and the combination result accords better with human intuition.%D-S证据理论在决策级信息融合领域有着广泛的应用,但其在合成冲突证据时会出现与直观结论不符的现象.通过深入分析D-S证据理论合成冲突证据时的失效原因,提出了一种简单有效的改进方法.通过主观权重和客观权重的综合得到不同证据的信任度,以此确定冲突证据及对应的折扣度并对其进行折扣度修正,使合成结果快速向正确类型收敛.仿真结果表明,同已有方法相比,本文方法特别适合具有少数冲突证据的情况,其合成结果更加符合直观判断.