摘要
简述了Dempster Shafer证据理论的基本原理。认为曲轴箱压力和机身振动加速度这两类信号具有互补性,可以用于识别活塞 缸套 活塞环组件工作状态,对其选取了几个有效的信号特征参数。根据D S证据理论,采用模糊隶属度计算基本概率分配,采用基于基本概率分配值的决策方法对两类信号进行信息融合,结果表明运用证据理论能够有效地提高识别活塞 缸套 活塞环组件工作状态的准确性。
The basic principle of Dempster-Shafer evidence theory was briefly introduced.Two types of signals-crankcase pressure signal and block vibration acceleration signal were considered to have the property of mutual complementarity.The signals could be used to identify the status of piston-cylinder-ring assembly,and several effective characteristic parameters of the signals were selected.Based on the evidence theory,the fuzzy subjection was used to calculate the basic probability which in turn to fuse the two types of signals through the decision-making measurement.The result showsS that the status of piston-cylinder-ring assembly could be identified precisely through the evidence theory.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2004年第1期91-95,共5页
Transactions of Csice
基金
湖南省自然科学基金资助项目(99jjy2074)
湖南省教育厅重点科研项目(01A020)。
