Profilogramms processing technique using wavelet-fractal analysis

Investigate the correlation between «evolutions of a dynamical system - the evolutions of the quality of the rubbing surfaces». An experiment was carried on friction machine «Tribal-2» for transfer the reciprocating motion with friction on the sample of brass. The internal dynamics of friction was investigated using multilevel wavelet decomposition and the calculation of fractal dimensions obtained profilogramms. After analysis of the data were obtained graphics describing the internal dynamics of the process: the evolution of the roughness parameters Ra, cumulates and Hurst coefficient for frequency component signals profilogramms. It was found that the Hurst exponent has an oscillatory character, which indicates to the oscillation stability and instability of the state of the surface layer of interacting counter-pairs