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Multi-scale analysis of surface topographies by modal filtering

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HAL Id: hal-00997830

https://hal.archives-ouvertes.fr/hal-00997830

Submitted on 22 May 2019

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Multi-scale analysis of surface topographies by modal filtering

Hugues Favreliere, Gaëtan Le Goïc, Serge Samper, Fabien Formosa

To cite this version:

Hugues Favreliere, Gaëtan Le Goïc, Serge Samper, Fabien Formosa. Multi-scale analysis of surface topographies by modal filtering. 2nd Seminar on Surface Metrology for the Americas, Oct 2012, Worcester, MA, United States. �hal-00997830�

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Hugues FAVRELIERE, Gaëtan LE GOÏC, Serge SAMPER, Fabien FORMOSA

University of Savoie (France)

Laboratoire SYMME, 5 chemin de Bellevue, F74940 ANNECY-LE-VIEUX

[hugues.favreliere, gaetan.le-goic, serge.samper, fabien.formosa]@univ-savoie.fr

MULTI-SCALE ANALYSIS OF SURFACE TOPOGRAPHIES BY MODAL FILTERING

Modal filtering Abstract

Applica�ons

Mechanical engineering

Analysis of a femoral head prothesis High value-added product

Discrete Modal Decomposi�on

(DMD) Surface

measurement

Modal Filtering

Sca�er plot (x, y, z)

Spectrum of modal amplitudes λ

i

(µm)

Spectrum of modal amplitudes λ

i

(µm) Spectrum of modal amplitudes λ

i

(µm)

3D representa�on of the surface

Form error

Waviness

Residue Residue

Residue

Residue

Residue

Waviness

Waviness

Waviness

Waviness

Measured surface Measured

surface

Form error

Form error

Form error

Form error

Residue

(noise, aperiodic components,...) Waviness

Form error

(Pa)

(Pb)

Spectrum of modal amplitudes λ

i

(µm)

This work introduces an innova�ve method for the mul�-scale analysis of surface topographies, which consists of applying a method based

on a new parameteriza�on. This kind of surface parameteriza�on refers to natural modes of vibra�on, and is therefore named modal

parameteriza�on. It allows us to characterize the form, waviness and roughness defects of a surface. This parameteriza�on opens up new

fields of analysis, such as the appearance quality of surfaces. It is thereby possible to decompose a measured surface in a vector basis, of

which vectors are represented by plane natural eigenmodes sorted by frequency and complexity. Different filtering opera�ons can then be

produced, such as extrac�ng the primary form of the surface.

Références

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