双正交提升小波在非对称表面形貌分析中的应用

作者：陈江龙,吴立群,吕晶晶 日期：2008-02-25/span> 浏览：3866 查看PDF文档

双正交提升小波在非对称表面形貌分析中的应用

陈江龙,吴立群,吕晶晶
（杭州电子科技大学 机械工程学院，浙江 杭州 310018）

摘要：由平顶珩磨获得的表面形貌是非对称的、多尺度的，而传统滤波函数处理这类表面形貌时存在畸变效应。利用双正交小波的优点，使用提升方案，采用边界对称延拓策略，解决了传统滤波函数在突变处和边界处的畸变效应，并以缸套内表面为例，选用bior4.4双正交小波，证明了提升双正交小波在表面形貌分析中的改善作用。
关键词：表面形貌；畸变效应；双正交小波；提升方案
中图分类号：TH161.14；TN919.8文献标识码：A文章编号：1001-4551(2008)02-0070-04

Application of biorthogonal wavelet lifting scheme in analysis of the antisymmetric surface topography
CHEN Jianglong, WU Liqun, LV Jingjing
(College of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China)
Abstract: Some machined surface such as plateau honing surface are antisymmetrical and multiscaling, though the traditional filtering functions exist distortion effects when the functions are applied on a such surface. taking the inner surface of cylinder as the research object, a deeply study on skew surface topography with wavelet lifting scheme was made. According to the characteristic of the antisymmetrical topography, the data acquired from the research object, using the bior4.4 biorthogonal wavelet with symmetric extension methods, was processed and analyzed, and the border effects were finally resolved.
Key words: surface topography; distortion effect; biorthogonal wavelet; lifting scheme
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