Process damping force model calibration using in situ velocity

This paper describes a process damping force model calibrated using an in situ measurement of velocity during an unstable milling test. The process damping coefficient is selected to match simulated and measured velocity signals. The coefficient is inserted in the cutting force model and time-delay differential equations of motion that describe the milling system. The modeling approach is described and experimental results are presented for: 1) selecting the process damping coefficient; and 2) comparing measured velocities and milling stability to predictions from time domain simulation.