基于距离加权证据理论的管网泄漏诊断

摘要

Considering the fact that fusion algorithm of weighted evidence theory doesn' t work in high conflicts, a new evidence theory which based on distance weight was proposed according to the characteristics of heating network;and weight coefficients were decided by the distance between sensors and points to be diagnosed, and the information were integrated with weighted by making use of average and evidence theory. Matlab simulation results show that the distance weighted evidence theory can solve the problem of being out of work and can meet the characteristics of pipe network system.%针对高冲突情况下证据理论融合算法会出现的失效问题,提出基于距离的加权证据理论,根据天然气管网系统的特性,用各个传感器与待诊断点的距离来确定权重系数,利用加权平均与证据理论相结合的方法进行信息融合.Matlab仿真结果表明:该方法既能解决失效问题又能满足实际天然气管网系统特性的需要.