机械强度
機械彊度
궤계강도
JOURNAL OF MECHANICAL STRENGTH
2010年
1期
5-9
,共5页
崔玲丽%胥永刚%胡邦喜%张建宇
崔玲麗%胥永剛%鬍邦喜%張建宇
최령려%서영강%호방희%장건우
齿轮裂纹%早期故障%经验模式分解%解调
齒輪裂紋%早期故障%經驗模式分解%解調
치륜렬문%조기고장%경험모식분해%해조
Gear tooth crack%Early fault%Empirical mode decomposition%Demodulation
齿轮轮齿发生早期裂纹时,裂纹故障信号十分微弱.为了有效提取早期裂纹故障特征,文中提出基于经验模式分解(empirical mode decomposition, EMD)的早期故障诊断方法.该方法首先去除振动信号中的啮合基频及其谐波成分,得到残余信号,然后针对残余信号进行基于EMD解调分析和处理.仿真及工程实例分析结果表明,所提方法能成功地将齿轮早期裂纹故障信息从复杂的振动中提取出来,更有利于及早发现故障,并判断故障的严重程度.
齒輪輪齒髮生早期裂紋時,裂紋故障信號十分微弱.為瞭有效提取早期裂紋故障特徵,文中提齣基于經驗模式分解(empirical mode decomposition, EMD)的早期故障診斷方法.該方法首先去除振動信號中的齧閤基頻及其諧波成分,得到殘餘信號,然後針對殘餘信號進行基于EMD解調分析和處理.倣真及工程實例分析結果錶明,所提方法能成功地將齒輪早期裂紋故障信息從複雜的振動中提取齣來,更有利于及早髮現故障,併判斷故障的嚴重程度.
치륜륜치발생조기렬문시,렬문고장신호십분미약.위료유효제취조기렬문고장특정,문중제출기우경험모식분해(empirical mode decomposition, EMD)적조기고장진단방법.해방법수선거제진동신호중적교합기빈급기해파성분,득도잔여신호,연후침대잔여신호진행기우EMD해조분석화처리.방진급공정실례분석결과표명,소제방법능성공지장치륜조기렬문고장신식종복잡적진동중제취출래,경유리우급조발현고장,병판단고장적엄중정도.
Gear tooth crack fault signal is very weak when the crack is in early stage.To extract early gear tooth crack fault feature effectively, an early fault diagnosis method is put forward based on the empirical mode decomposition (EMD).In this method, the gear meshing harmonics are first removed from the vibration signal to generate the residual signal.The residual signal is then analyzed by using the EMD demodulation method.Simulation results and actual engineering diagnosis example demonstrate that the demodulation analysis method proposed can extract the early crack fault feature of gear from complicated vibration signals successfully.It is more favourable to detect the early fault and judge the fault degree.