Stochastic Self-Tuning Control of Cutting Forces in a CNC Machine Tool

Abstract

A stochastic self-tuning controller is implemented to regulate the cutting forces in end milling under varying cutting conditions. A microprocessor controlled NC milling machine is used in this study. The force controller is implemented using another microcomputer system interfaced with the CNC milling machine. Both the linear and nonlinear characteristics of the cutting forces are examined. A deadbeat controller is then used for force regulation. The proposed controller is shown using simulation and experimental resul ts to be stable with good performance characteristics over a wide range of operating conditions.