Continuous wavelet transform based face milling tool condition classification using support vector machine and K-star algorithm-a comparative study

This study presents a vibration-based tool condition monitoring approach for face milling processes under varying cutting parameters. The analysis involved computing thirty features (ten statistical and twenty histogram features) from Continuous Wavelet Transform (CWT) coefficients using five wavelet families 'Daubechies (db), Biorthogonal (bior), Reverse Biorthogonal (rbior), Symlet (sym), and Coiflet (coif)' across sixty-four levels. The best levels of highly performing wavelet member from each wavelet family was identified using the J48 algorithm. They were rbior1.5 at level 14, bior5.5 at level 13, db8 at level 3, sym6 at level 3 and coif4 at level 13. The prominent features of the identified wavelet members at their respective levels were selected using decision tree and inputted to support vector machine (SVM) and K-star algorithms. The results show that the K-star outperformed the SVM with the CWT feature. The performance of other ML algorithms, namely, random forest, k-NN, Na & iuml;ve Bayes, and Bayes net algorithms were also analysed. The findings highlight the potential adoption of this approach in manufacturing industries to optimize tool usage while ensuring product surface quality.