Robust stability of milling processes

Abstract eng:
Prediction of machine tool chatter requires the characterization of the dynamics of the machine-tool-workpiece system by means of frequency response functions (FRFs). Uncertainties of the measured FRFs implies uncertainties of the calculated stability diagrams, therefore robust stability analysis against perturbations of the FRF is of high importance. In this work, a method is presented to calculate robust stability boundaries based on uncertain FRFs using a combination of the multi frequency solution and the concept of stability radius defined by µ-values.

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