基于小波和小波分形的冷连轧机振动识别方法
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摘要
针对2180 mm冷连轧机振纹现象的随机性和隐蔽性的特点,基于小波分析和分形理论,系统地研究了能够准确地识别轧机振动的方法.对典型工况下轧机振动信号的分析结果显示,两种方法均能有效地识别轧机振动的现象,为在复杂振动环境下识别振纹振动提供了有效途径,这对于实时监测轧机的运行状况,避免恶性生产事故的发生,进而实现预知轧机振动具有积极的现实意义.
Aiming at the randomness and imperceptibility of chatter marks in a 2180 mm tandem cold rolling mill,two methods to identify the vibration of the rolling mill were systematically studied based on wavelet analysis and the fractal theory.Vibration signals from the rolling mill under typical conditions were analyzed by the two methods.The results show that both can effectively identify the vibration of the rolling mill.This paper provides an effective way to identify the chatter vibration in the complex vibration environment.The two methods have practical significance for real-timely monitoring the operation condition of rolling mills,avoiding the occurrence of hazardous production accidents,and then predicting the vibration of rolling mills.
Aiming at the randomness and imperceptibility of chatter marks in a 2180 mm tandem cold rolling mill,two methods to identify the vibration of the rolling mill were systematically studied based on wavelet analysis and the fractal theory.Vibration signals from the rolling mill under typical conditions were analyzed by the two methods.The results show that both can effectively identify the vibration of the rolling mill.This paper provides an effective way to identify the chatter vibration in the complex vibration environment.The two methods have practical significance for real-timely monitoring the operation condition of rolling mills,avoiding the occurrence of hazardous production accidents,and then predicting the vibration of rolling mills.
引文
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[9]Jiang J D,Chen J,Qu L S.The application of correlationdimension in gearbox condition monitoring.J Sound Vib,1999,223(4):529
[10]Zhang Z H,Hang W Y.Fractal determination and featureextraction from vibration waveforms.J Southeast Univ,1999,29(4):26(张朝晖,黄惟一.振动波形的分形判别及特征提取.东南大学学报,1999,29(4):26)
[11]Luo J,He L M,Chen C.Wavelet fractal technology andits application to aeroengine fault diagnoisis.J ProjectilesRockets Missiles Guid,2006,26(1):862(罗俊,何立明,陈超.小波分形理论及其在航空发动机故障诊断中的应用.弹箭与制导学报,2006,26(1):862)
[12]Fei B,Jiang Z D,Wang H R.Genetic algorithm for deter-mining scale independent fractals associated with grindingsurface.J Xi’an Jiaotong Univ,1998,32(7):72(费斌,蒋庄德,王海容.基于遗传算法求解分形无标度区的方法.西安交通大学学报,1998,32(7):72)
[2]Hou F X,Zhang J,Shi X L,et al.Horizon chatter in asingle-roll driving temper rolling mill system.J Univ SciTechnol Beijing,2006,28(10):973(侯福祥,张杰,史小路,等.单辊驱动平整机水平颤振.北京科技大学学报,2006,28(10):973)
[3]Keller N L,Lesonick M S.Vibration analysis of stand F2of Wheeling-Pittsburgh’s 80-in hot strip mill.Iron SteelEng,1990,67(5):17
[4]Hou F X,Zhang J,Shi X L,et al.Measurement of chattermarks on the backup roll of a cold temper mill.J UnivSci Technol Beijing,2007,29(6):613(侯福祥,张杰,史小路,等.冷轧平整机振纹实测研究.北京科技大学学报,2007,29(6):613)
[5]Gao L X,Xing J,Lei X.Gearbox fault diagnosis basedwavelet analysis.J Univ Sci Technol Beijing,2003,25(3):267(高立新,邢钧,雷迅.基于小波分析的齿轮箱故障诊断.北京科技大学学报,2003,25(3):267)
[6]Zhang G C,Wu B Z,Liu Y F.Application of waveletanalysis in earthquake signal de-noise.Min Metall,2003,12(1):89(张根昌,吴并臻,刘跃峰.小波分析技术在地震信号噪声处理中的应用.矿冶,2003,12(1):89)
[7]Zhang Q H,Wang T Y,Xu Y S.Application of waveletanalysis in noise signal of compressor.Manuf Inf EngChina,2003,32(2):114(张庆华,王太勇,徐燕申.小波分析在压缩机噪声信号去除趋势项处理中的应用.中国制造业信息化,2003,32(2):114)
[8]Coifman R R,Meyer Y,Quake S,et al.Signal processingand compression with wavelet packets.Wavelets TheirAppl,1994,442:363
[9]Jiang J D,Chen J,Qu L S.The application of correlationdimension in gearbox condition monitoring.J Sound Vib,1999,223(4):529
[10]Zhang Z H,Hang W Y.Fractal determination and featureextraction from vibration waveforms.J Southeast Univ,1999,29(4):26(张朝晖,黄惟一.振动波形的分形判别及特征提取.东南大学学报,1999,29(4):26)
[11]Luo J,He L M,Chen C.Wavelet fractal technology andits application to aeroengine fault diagnoisis.J ProjectilesRockets Missiles Guid,2006,26(1):862(罗俊,何立明,陈超.小波分形理论及其在航空发动机故障诊断中的应用.弹箭与制导学报,2006,26(1):862)
[12]Fei B,Jiang Z D,Wang H R.Genetic algorithm for deter-mining scale independent fractals associated with grindingsurface.J Xi’an Jiaotong Univ,1998,32(7):72(费斌,蒋庄德,王海容.基于遗传算法求解分形无标度区的方法.西安交通大学学报,1998,32(7):72)
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