The invention discloses a milling
flutter recognition method based on variation
modal decomposition and energy entropy, and belongs to the technical field of
machine tool
machining flutter recognition. The milling
flutter recognition method comprises the following steps of S1, establishing a VMD
mathematical model; S2, establishing a
mathematical model of the energy entropy; S3, conducting three sets of milling
machining experiments representing three
cutting states, including stable
cutting, a weak flutter and a severe flutter, and obtaining three sets of milling force signals through a
dynamometer; S4, conducting FFT analysis on the three sets of milling force signals, and proving that the three sets of milling force signals represent the states of stable
cutting, the weak flutter and the severe flutter respectively; S5, determining the number K of optimal modals of VMD
decomposition and a
penalty factor alpha through a VMD parameter automatic
selection method based on a kurtosis value; S6, solving instantaneous frequencies of multiple IMF, and determining a milling flutter characteristic
frequency band; S7, adopting a hammering experiment to obtain the
modal of a knife; S8, extracting a flutter characteristic vector of each IMF based on the energy entropy. According to the milling flutter recognition method based on the variation
modal decomposition and the energy entropy, the VDM decomposition effect is improved, and automatic flutter recognition is achieved.