Regenerative chatter is a major limitation in machining operations. This phenomenon is a result of an
unstable interaction between the machining forces and the structural deﬂections. The forces generated
when the cutting tool and part come into contact produce signiﬁcant structural deﬂections.
These structural deﬂections modulate the chip thickness that, in turn, changes the machining forces.
For certain cutting conditions, this closed-loop, self-excited system becomes unstable and regenerative
chatter occurs. Regenerative chatter may result in excessive machining forces and tool wear, tool failure,
and scrap parts due to unacceptable surface ﬁnish, thus severely decreasing operation productivity and