|
|
|
| Purification of rotor axis’s orbit based on morphological wavelet |
ZHANG Wen-bin1,2, ZHOU Xiao-jun1, SHEN Lu1, LI Jun-sheng2,
YANG Xian-yong1, LIN Yong1 |
1. Zhejiang Provincial Key Laboratry of Advanced Manufacturing Technology,
Institute of Modern Manufacturing Engineering, Zhejiang University, Hangzhou 310027, China;
2. Department of Mechanical Engineering and Automation, Engineering College, Honghe University, Mengzi 661100, China |
|
|
|
Abstract Aiming at the purification of rotor axiss orbit in turbine generator unit, a novel approach was proposed based on morphological wavelet. As a kind of nonlinear wavelet, morphological wavelet has both the morphological characteristic of mathematical morphology and the multiresolution feature of wavelet. It has good performance in keeping details and resisting noises. Using this method to purify rotor axiss orbit, theres no need to consider spectrum characteristic of vibration signal. And purified rotor axiss orbit could be obtained through threshold denoising for components decomposed by morphological wavelet and reconstruction of processed signal. Compared with traditional Haar wavelet, this method is more effective in purification of rotor axiss orbit when processing data detected. The morphological wavelet algorithm only includes addition, subtraction, maximum and minimum operations, its suitable for online monitor and fault diagnosis of turbine generation unit．
|
|
Published: 21 September 2010
|
|
|
基于形态小波的转子轴心轨迹提纯
针对汽轮发电机组轴心轨迹的提纯问题,提出采用形态小波提纯转子轴心轨迹的新方法.形态小波作为一种非线性小波,兼顾数学形态学的形态特征和小波的多分辨率特性,具有良好的细节保留和抗噪声性能.采用形态小波提纯轴心轨迹,无须考虑信号的频谱特征,通过对形态小波分解得到的分量进行阈值降噪处理,然后重构原信号得到提纯的轴心轨迹.将实际数据分别通过传统的Haar小波与形态小波进行处理,结果表明,形态小波在轴心轨迹提纯方面的效果更明显.由于形态小波变换算法只涉及加减和极大、极小运算,算法简单且执行高效,适合汽轮发电机组故障的在线监测和诊断.
|
|
| ［1］ 安连锁,胡爱军,唐贵基,等.采用数学形态滤波器的轴心轨迹提纯［J］.动力工程,2005,25(4)：550553．
AN Liansuo, HU Aijun, TANG Guiji, et al. Purification of rotor centers orbit with mathematical morphology filters ［J］. Journal of Power Engineering, 2005, 25(4): 550553．
［2］ GOUTSIAS J,HEIJMANS H J A M.Nonlinear multiresolution signal decomposition schemes—Part I: Morphological pyramids ［J］.IEEE Trans actions. on Image Processing,2000,9(11)：18621876．
［3］ HEIJMANS H J A M,GOUTSIAS J.Nonlinear multiresolution signal decomposition schemes—Part II:Morphological wavelets ［J］.IEEE Trans actions. on Image Processing,2000,9(11)：18971913．
［4］ SWELDENS W.The lifting scheme:a construction of second generation wavelets ［J］.SIAM Journal of Mathematical Analysis,1997,29(2)：511546．
［5］ ZHANG Lijun,XU Jinwu,YANG Debin,et al.Fault feature extraction to equipments using morphological wavelet denoising ［C］∥Proceedings of International Conference on Machanical Transmissions.Beijing:Science Press,2006:13951402．
［6］ 章立军,阳建宏,徐金梧,等.形态非抽样小波及其在冲击信号特征提取中的应用［J］.振动与冲击,2007,26(10)：5659．
ZHANG Lijun, YANG Jianhong, XU Jinwu, et al.Morphological undecimated wavelet and its application to feature extraction of impulsive signal ［J］. Journal of Vibration and Shock, 2007, 26(10)：5659．
［7］ 郝如江,马冰玉.形态小波变换在轴承故障信号处理中的应用［J］.石家庄铁道学院学报：自然科学版,2007,20(4)：3135．
HAO Rujiang, MA Bingyu. Application of morphological wavelet transform on bearing faults signals processing ［J］. Journal of Shijiazhuang Railway Institute:Natural Science, 2007,20(4)：3135．
［8］ 郝如江,卢文秀,褚福磊.滚动轴承故障信号的数学形态学提取方法［J］.中国电机工程学报,2008,28(26)：6570．
HAO Rujiang, LU Wenxiu, CHU Fulei.Mathematical morphology extracting method on roller bearing fault signals ［J］. Proceedings of the CSEE,2008,28(26): 6570．
［9］ MARAGOS P, SCHAFER R W.Morphological filters—Part I: Their set theoretic analysis and relation to linear shift invariant filters ［J］.IEEE Transcations on ASSP, 1987, 35(8): 11531169．
［10］ MARAGOS P, SCHAFER R W.Morphological filtersPart II: their relation to median, orderstatistic and stack filters ［J］.IEEE Transcations on ASSP, 1987, 35(8): 11701184．
［11］ SERRA J. Morphological filtering an overview ［J］.Signal Processing, 1994, 38(1): 311．
［12］ 崔屹.图像处理与分析:数学形态学方法及应用［M］.北京：科学出版社,2000:113．
［13］ 唐贵基,王维珍,胡爱军,等.数学形态学在旋转机械振动信号处理中的应用［J］.汽轮机技术,2005,47(4)：271272．
TANG Guiji, WANG Weizhen, HU Aijun, et al. Mathematical morphology and its application in processing rotating machinery vibration signals ［J］. Turbine Technology, 2005, 47(4): 271272．
［14］ 张文斌,周晓军,林勇.广义形态滤波器在振动信号处理中的应用研究［J］.农业工程学报,2008,24(6)：203205．
ZHANG Wenbin, ZHOU Xiaojun, LIN Yong. Application research of generalized morphological filter in vibration signal processing ［J］. Transactions of the CSAE, 2008,24(6): 203205．
［15］ ZHANG Wenbin,ZHOU Xiaojun,MU Fahai.Application of morphological filter in purification of rotor centers orbit ［C］∥Proceedings1st International Congress on Image and Signal Processing. Sanya,China: IEEE,2008:136140．
［16］ 申志强,潘再生,曹长修.基于图像处理的冷轧薄板板形识别［J］.浙江大学学报：工学版,2007,41(10)：16151619．
SHEN Zhiqiang, PAN Zaisheng, CAO Changxiu. Coldrolled strip plateprofile recognition based on image processing method ［J］. Journal of Zhejiang University:Engineering Science, 2007, 41(10)：16151619．
［17］ 孔庆鹏,宋开臣,陈鹰.最小二乘自适应滤波旋转机械阶比跟踪研究［J］.浙江大学学报：工学版,2006,40(9)：16481651．
KONG Qingpeng, SONG Kaichen, CHEN Ying. Study on leastsquare adaptive filter order tracking in rotating machinery ［J］. Journal of Zhejiang University:Engineering Science, 2006, 40(9)：16481651． |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
