一种改进的证据推理组合规则

提出了一种新的证据理论组合规则,综合考虑了支持信息和冲突信息对合成结果的影响。在求出各个证据之间局部冲突之后,利用各个证据的可信度得到系统的全局冲突;以全局冲突作为参量定义了一个冲突证据有效性系数,该系数反映了冲突信息对最终融合结果的影响。算例验证结果表明,新的组合规则能够有效地处理证据中的冲突信息,得出合理的融合结果。

A Modified Combination Rule of Evidence Theory

Evidence theory is widely used in data fusion systems. However, there exist some problems in its combination rule. A modified combination rule was presented. First, a global conflict is calculated by the weighted average of the local conflict. Then, a validity coefficient is defined to show the effect of the conflict evidence on the combination results. Compared with other combination rules, the proposed rule considers not only the consistency of evidence, but also the conflict of them. The numerical example shows that the new combination rule improves the reliability and rationality of the combination results.