Active chatter control in turning processes with input constraint.

Regenerative chatter is an annoying dynamic phenomenon in machining processes. In this paper, an adaptive sliding mode controller (SMC) is developed for turning chatter mitigation in the presence of control input constraint, parameter uncertainties, and external disturbances. Adaptive laws are employed to estimate parameter uncertainties and disturbances, while a SMC, fulfilling the control input constraint, is designed to mitigate chatter. One unique feature of the developed adaptive approach is that it guarantees chatter suppression even in the presence of control input constraint. Theoretical analyses and experimental investigations are performed, and results demonstrate that the developed SMC with chosen controller parameters guarantees chatter mitigation in the tested examples. [ABSTRACT FROM AUTHOR]