一种新的证据理论改进策略  

A new improved strategy of evidence theory

作　　者：苏起起 贾云伟[1,2] 张志威 陈笑通 付邦鹏 SU Qiqi;JIA Yunwei;ZHANG Zhiwei;CHEN Xiaotong;FU Bangpeng(Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control,Tianjin University of Technology,Tianjin 300384,China;National Demonstration Center for Experimental Mechanical and Electrical Engineering Education,Tianjin University of Technology,Tianjin 300384,China;Tiandy Technologies Co.,Ltd.,Tianjin 300308,China)

机构地区：[1]天津理工大学天津市先进机电系统设计与智能控制重点实验室,天津300384 [2]天津理工大学机电工程国家级实验教学示范中心,天津300384 [3]天地伟业技术有限公司,天津300308

出　　处：《天津理工大学学报》2024年第3期73-78,共6页Journal of Tianjin University of Technology

基　　金：天津市自然科学基金(18JCYBJC19300);2022年大学生创新创业训练计划项目(202210060092);天津理工大学校级教学基金项目(YB22-05)。

摘　　要：针对Dempster-Shafer(D-S)证据理论应用于有冲突的证据间融合时,出现证据理论不可用或者得出与事实相悖结论的问题,提出了一种新的证据理论改进策略。首先,通过计算不同证据源之间的距离来度量证据间的相似度,从而判别异常证据体;然后,根据证据对焦元的信任情况以及信任度的大小设置每个证据体的外权重和内权重,再使用加权平均的算法构造出新的替换证据;最后运用原有的组合规则对多源信息进行融合。仿真结果表明,基于这种新的加权方式的策略是有效的,可以解决融合时出现的悖论问题,相较于其他同类改进算法,具有更高的证据信任度。When Dempster-Shafer(D-S)evidence theory is applied to the fusion of conflicting evidence,the evidence theory can not be used or the conclusion is contrary to the facts,and so a new strategy for improving evidence theory is proposed.Firstly,the similarity of evidence is measured by calculating the distance between different evidence sources,so as to distinguish abnormal evidence body.Then,the external weight and internal weight of each evidence body are set according to the trust of the focal element and the degree of trust,and the new replacement evidence is constructed by weighted average method.Finally,the original combination rules are used to fuse multi-source information.Simulation results show that the new weighted method is effective and can solve the paradox problem in fusion.Compared with other similar improved algorithms,the method in this paper has higher evidence confidence.

关 键 词：DEMPSTER-SHAFER证据理论 冲突悖论 多源信息融合 加权平均法 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]