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FFT and Digital Characterization of Random Surfaces
Author(s): LI Dongxing1, WANG Yichang2, LI Aijun1(1.shandonguniversityoftechnology, ZIBO 255091china, 2.THE Supervisedepartmentofqualityandtechnology, ZHANGDIAN Sbranch, ZIBO 255032, china)
Pages: 58-
60
Year: 2002
Issue:
2
Journal: Journal of Shandong Institute of Technology
Keyword: FFT; PSDF; ACVF; ACF; DIT-FFT;
Abstract: 提出了用FFT(fastfouriertransform)分析与表征随机表面空间形貌特征的方法 ,对随机表面的PSDF(powerspectrumdensityfunction)和ACVF(auto covariancefunction)或ACF(autocorrelationfunction自相关函数 )进行了系统分析 ,用基 2DIT FFT(discretein timeFFT)对表面信号分别在时域和频域进行了分析与讨论 ,阐述了从原理方法到运算速度的优越性
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