• CN:11-2187/TH
  • ISSN:0577-6686

›› 2006, Vol. 42 ›› Issue (9): 140-143.

• 论文 • 上一篇    下一篇

分形表征机加工表面有效性的方均根测度方法

朱华;李刚;唐玮   

  1. 中国矿业大学可靠性工程研究所
  • 发布日期:2006-09-15

ROOT MEAN SQUARE METHOD ON VALID FRACTAL CHARACTERIZATION FOR MACHINED SURFACES

ZHU Hua;LI Gang;TANG Wei   

  1. Institute of Reliability Engineering, China University of Mining and Technology
  • Published:2006-09-15

摘要: 为阐明方均根测度方法表征机加工表面的有效性,以结构函数测度方法为比较对象,对车削、铣削、磨削及砂纸打磨等不同加工表面进行了分形表征。研究表明,方均根测度方法的分形表征无标度区间宽,表征曲线线性度好,因而分形计算精度高;对采样频率的依赖性小,在计算过程中不会造成分形对象的信息丢失,因而分形表征的客观性好。另外,方均根测度方法还具有物理意义明确,分形表征简单直观等优点。方均根测度方法是机加工表面分形表征的一种较有效的方法。

关键词: 方均根测度, 分形表征, 机加工表面, 结构函数测度

Abstract: In order to clarify the validity of the method of root mean square measurement(RMSM) for fractal characterization of surfaces, a set of surfaces with different roughness are processed by turning, milling, grinding and rubbing, and their fractal characterizations are performed with the RMSM method and the structure function measurement(SFM) method for comparing. The results show that RMSM method has the characteristics as follows: wider range of scale invariance and better linearity of fractal characterization curves to make it more accurate; less dependent on sampling frequency and nonvolatility of fractal information during fractal calculation to be more objective; and definite physical meanings and simple fractal characterization to become easier. The RMSM is a valid method for fractal characterization of machined surfaces.

Key words: Machined surface, Fractal characterization, Root mean square measurement, Structure function measurement

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