A Spectral Approach to the Analysis of Rough Surfaces

[+] Author and Article Information
H. Moalic, J. A. Fitzpatrick, A. A. Torrance

Department of Mechanical Engineering, Trinity College, Dublin University, Dublin 2, Ireland

J. Tribol 111(2), 359-363 (Apr 01, 1989) (5 pages) doi:10.1115/1.3261924 History: Received January 02, 1988; Online October 29, 2009


A brief summary of the methods commonly used for the analysis of rough surfaces and the errors associated with these techniques is given. A frequency domain digital differentiator is shown to reduce the bias errors for estimates of the properties of slopes and curvatures for a sample spacing determined by the profilometer probe size. A comparison of this “spectral” approach with finite difference methods for calculating slope and curvature characteristics for a ground surface show substantial underestimates for the latter methods.

Copyright © 1989 by ASME
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