Abstract: To remedy the shortcomings in the recognition of evidence conflict by using conventional conflict coefficient, this method converts the Pignistic probability distance to the credibility of evidence. Then it combines credibility and false degree, which constructs a new correction coefficient to discount the basic belief assignment function. Finally, the basic belief assignment functions adjusted by correction coefficient are fused by D-S combination rule. Numerical example analysis results show that the improved evidence combination method has the possession of rapid convergence and good robustness, keeping the good nature of D-S combination rules.

Key words: D-S evidence theory, Pignistic probability distance, falsity, correction coefficient

摘要： 针对使用冲突系数辨认证据冲突存在的不足，将Pignistic概率距离转换为证据的可信度，再将证据的可信度和虚假度结合起来，构造一个新的修正系数，然后利用新的修正系数来折扣基本可信度分配函数。最后，利用D-S证据组合规则对修正后的证据进行合成。数值算例分析的结果表明，改进后的证据组合方法得到的结果具有收敛速度快和鲁棒性好的特点，同时保持了D-S组合规则的优良性质。

关键词: D-S证据组合规则, Pignistic概率距离, 虚假度, 修正系数