CAJ | 학술논문

液压系统在大功率和自动化工程机械中得到了广泛应用。但在工程实际中，由于结构复杂使得液压系统的故障诊断非常困难。特别是在现场施工过程中，如果液压系统的故障得不到及时处理，会导致设备长时间的停工而严重影响到施工效率。为此，提出了一个远程视情维护解决方案，通过对失效模式与影响分析（FMEA）方法的扩展和工程机械液压系统FMEA知识库的开发，实现专家知识与设备工作过程中实时采集数据的集成。介绍了系统的整体结构设计、数据采集、故障特征提取以及FMEA知识库的建立等关键技术，并给出了一个工程实际案例。
액압계통재대공솔화자동화공정궤계중득도료엄범응용。단재공정실제중，유우결구복잡사득액압계통적고장진단비상곤난。특별시재현장시공과정중，여과액압계통적고장득불도급시처리，회도치설비장시간적정공이엄중영향도시공효솔。위차，제출료일개원정시정유호해결방안，통과대실효모식여영향분석（FMEA）방법적확전화공정궤계액압계통FMEA지식고적개발，실현전가지식여설비공작과정중실시채집수거적집성。개소료계통적정체결구설계、수거채집、고장특정제취이급FMEA지식고적건립등관건기술，병급출료일개공정실제안례。
Hydraulic system has been widely applied in high-power and automated construction machinery.But there are many difficulties in its fault diagnosis because of the complicated struc-ture of hydraulic system.Especial y in the working site,it may cause the shutdown of work when the fault can’t be removed timely.In this study,an extended failure mode and effects analysis (FMEA)method is presented to integrate expert knowledge and working data.A remote condi-tion-based maintenance approach is presented,and an application system with FMEA knowledge base has been developed for construction machinery hydraulic system.The system structure and some key problems such as data acquisition,fault features extraction,as wel as FMEA knowl-edge base is discussed.An application example shows the system is content.