ANALYZING VARIATIONS IN ROUNDNESS PROFILE PARAMETERS DURING THE WAVELET DECOMPOSITION PROCESS USING THE MATLAB ENVIRONMENT

Signa l analysis performed during surface texture measure ment frequently involves applying the Fourier transform. The method is particularly useful for as sessing roundness and cylindrical profiles. Since t he wavelet transform is becoming a common tool for signal analysis in many metrological applications, it is vital to evaluate its suitability for surface texture profiles. The r esearch presented in this paper focused on signal d ecomposition and reconstruction during roundness profile measure ment and the effect o f these processes on the changes in selected roundness profile parameters. The calculat ions were carried out on a sample of 100 roundness profiles for 12 different forms of mother wavelets using MATLAB. The use of Spearman’s rank correlation coefficients allowed us to evaluate the relationship between the two chosen criteria for selecting the optimal moth er wavelet.