摘要
工程表面的二维功率谱包含了丰富的有关表面特征的重要信息。本文阐述了二维快速付立叶变换（FFT）的基本原理，并用二维FFT和表面功率谱密度（APSD）的方法对磨削实验中的陶瓷加工表面进行了表面特性分析，介绍了从功率谱中提取信息的方法。
Two-dimensioning power spectrums of engineering surfaces contain plenty of information that is important to surface characterization. The basic concepts of twodimensional FFT(Fast Fourior Transformation) are described first in this paper. Then, the surface characterization of the ceramal surfaces acquired from the experiments through implementing Two-dimensional FFT and Two-dimensional APSD(areal power spectral density) is analyzed. At last, the method of obtaining more valubable information from power spectrums is introduced.
出处
《工具技术》
北大核心
1997年第8期38-41,共4页
Tool Engineering
关键词
表面粗糙度
二维FFT
二维APSD
角度谱
半径谱
surface roughness
two-dimensional FFT
two-dimentional APSD
Angular spectrum
radial spectrum
