DOI 10.17586/0021-3454-2021-64-6-498-502
UDC 531.44
DGC-ANALYSIS FOR RANDOM PROFILES OF SURFACES
Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences, Saint Petersburg, 199178, Russian Federation; Chief Researcher
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Abstract. The object of research is profilograms (random vectors) of two functional metal surfaces that were in frictional interaction. Possibilities of analysis of the main components using the properties of covariance matrices are determined. The evaluation by the sample covariance matrix is carried out. The eigenvectors and eigenvalues of the covariance matrix are calculated. The coordinate system defined by the eigenvectors makes it possible to estimate the maximum and minimum variance. The evolution of microgeometry variability is traced at different times of interaction of tribopairs. Thus, a DGC analysis technique has been proposed.
Keywords: profilograms, random vectors, covariance analysis, ellipses of dispersion
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