中国机械工程2012，Vol.23Issue(8)：951-956,6.
LMD时频分析方法的端点效应在旋转机械故障诊断中的影响
Research on End Effect of LMD Based Time-frequency Analysis in Rotating Machinery Fault Diagnosis
摘要
Abstract
An index was developed based on energy for evaluating the end effect of LMD.The end effects of LMD and EMD（empirical mode decomposition） were compared.Because the envelop definition was different,in LMD the undefined envelop near border was shorter than that in EMD.LMD end effect is not as seriously as EMD.A mirror extension method was developed to reduce the end effect.The simulation results are quite good.LMD is applied in cracked rotor diagnosis,and the experimental results are also quite good.关键词
旋转机械/故障诊断/转子裂纹/局域均值分解/端点效应Key words
rotating machinery/fault diagnosis/cracked rotator/local mean decomposition(LMD)/end effect分类
机械制造引用本文复制引用
任达千,杨世锡,吴昭同,严拱标..LMD时频分析方法的端点效应在旋转机械故障诊断中的影响[J].中国机械工程,2012,23(8):951-956,6.基金项目
国家高技术研究发展计划（863计划）资助项目 （）
浙江省自然科学基金资助项目 （）
浙江机电职业技术学院孵化基金资助项目 （）
