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In this paper, a method for estimation of cutting force model coefficients is proposed. The method makes use of regularized total least squares to identify the cutting forces from the measured acceleration signals and the frequency response function (FRF) matrix. An original regularization method is proposed which is based on the relationship between the harmonic components of the cutting forces. Numerical tests are performed to evaluate the effectiveness of the method. The method is compared with unregularized methods and common Tikhonov regularization combined with GCV and L-curve methods. It was found that the proposed method provides more accurate estimates of the cutting force coefficcients than the unregularized method and common regularization techniques. Furthermore the influence of acceleration measurement errors, FRF matrix errors and FRF matrix conditioning on the accuracy of the estimated coefficients is investigated. It was concluded that FRF matrix errors influence the most the accuracy of the results.

Estimation of Cutting Force Model Coefficients with Regularized Inverse Problem