改进D-S证据理论在矿用皮带机故障诊断中的应用分析

Application of Improved D-S Evidence Theory in Fault Diagnosis of Mine Belt Conveyor

针对经典D-S证据理论融合冲突证据时会导致融合结果与客观实际情况不相符的问题。通过引入证据相关度和全局信任度等概念使得改进后的D-S证据理论能够充分考虑到包括冲突证据以内的任意证据的可信度,从而使得融合后的结果更加符合客观实际。并以矿用皮带机运行中常见的三种故障原因进行数值计算,分析得知:当证据存在冲突情况时,改进后的D-S证据理论相较于其他方法更能快速、有效的处理冲突证据,从而提高了矿用皮带机故障诊断的准确性和可靠性。

Aiming at the fusion result is inconsistent with the objective reality when the classical D-S evidence theory merges the conflicting evidence. the improved D-S evidence theory can fully consider the credibility of any evidence within the conflict evidence by introducing concepts such as evidence relevance and global trust, so as to make the fusion result more consistent with the objective reality. Based on the numerical calculation of three common fault reasons in the operation of mine belt conveyor, the improved D-S evidence theory can deal with the conflict evidence more quickly and effectively than other methods, thus improving the accuracy and reliability of fault diagnosis of mine belt conveyor.