中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2015年
11期
1464-1470
,共7页
吴占涛%程军圣%李宝庆%郑近德
吳佔濤%程軍聖%李寶慶%鄭近德
오점도%정군골%리보경%정근덕
自主致密局部特征尺度分解%局部特征尺度分解%模态混叠%最优致密系数%内禀尺度分量
自主緻密跼部特徵呎度分解%跼部特徵呎度分解%模態混疊%最優緻密繫數%內稟呎度分量
자주치밀국부특정척도분해%국부특정척도분해%모태혼첩%최우치밀계수%내품척도분량
autonomous compact local characteristic-scale decomposition(ACLCD)%local charac-teristic-scale decomposition(LCD)%mode mixing%optimal compact coefficient%intrinsic scale compo-nent(ISC)
针对局部特征尺度分解(LCD)的模态混叠问题,提出了自主致密局部特征尺度分解(ACLCD)方法。该方法通过确定待分解信号的最小信号极值尺度来度量其信号尺度,采用新增伪极值点均匀化信号尺度,可有效抑制模态混叠的产生；引入了最优致密系数的概念,并给出了最优致密系数评价准则。研究了 ACLCD 方法的原理,通过仿真信号将 ACLCD 与 LCD 和 EMD 进行分析对比,结果表明,ACLCD 在提高分量精确性和正交性、抑制模态混叠等方面具有一定的优越性。将 ACLCD 方法应用于转子碰摩故障的诊断,结果表明该方法有效。
針對跼部特徵呎度分解(LCD)的模態混疊問題,提齣瞭自主緻密跼部特徵呎度分解(ACLCD)方法。該方法通過確定待分解信號的最小信號極值呎度來度量其信號呎度,採用新增偽極值點均勻化信號呎度,可有效抑製模態混疊的產生；引入瞭最優緻密繫數的概唸,併給齣瞭最優緻密繫數評價準則。研究瞭 ACLCD 方法的原理,通過倣真信號將 ACLCD 與 LCD 和 EMD 進行分析對比,結果錶明,ACLCD 在提高分量精確性和正交性、抑製模態混疊等方麵具有一定的優越性。將 ACLCD 方法應用于轉子踫摩故障的診斷,結果錶明該方法有效。
침대국부특정척도분해(LCD)적모태혼첩문제,제출료자주치밀국부특정척도분해(ACLCD)방법。해방법통과학정대분해신호적최소신호겁치척도래도량기신호척도,채용신증위겁치점균균화신호척도,가유효억제모태혼첩적산생；인입료최우치밀계수적개념,병급출료최우치밀계수평개준칙。연구료 ACLCD 방법적원리,통과방진신호장 ACLCD 여 LCD 화 EMD 진행분석대비,결과표명,ACLCD 재제고분량정학성화정교성、억제모태혼첩등방면구유일정적우월성。장 ACLCD 방법응용우전자팽마고장적진단,결과표명해방법유효。
The least extrema scale was defined to measure other signal scales for restraining the mode mixing problem of LCD,and by adding pseudo-extrema autonomously to homogenize the signal scales.Based on this,a novel method of ACLCD was proposed.Compact coefficient was introduced, and the optimal evaluation criteria of compact coefficient was given.The paper firstly studied the the-ory of ACLCD,then simulation experiments were used to compare the performance of ACLCD with LCD and empirical mode decomposition(EMD).The results indicate that ACLCD is more efficient in improving the veracity,orthogonality in components and inhibiting the mode mixing than that of LCD and EMD.Finally,the proposed method was applied to diagnose the rotor with rub-impact fault suc-cessfully which indicates the effectiveness of ACLCD.
