Two Predictive Control Methods for Suppressing Vibrations of Thin Plates

Abstract. This paper investigates the mechanical vibration suppression problems for thin-walled workpieces in high-speed milling process and uses two different predictive control methods: General Predictive Control (GPC) and Laguerre Model Predictive Control (LMPC), where laser displacement detectors and high-frequency voice coil motors are utilized as sensors and actuators, respectively. The proposed control algorithm is validated in a vibration control system with a rectangular cantilever aluminium-alloy plate, which is used for simulating the thin-workpiece’s vibrations in the milling process. The experiment results demonstrate that LMPC is superior to GPC in active vibration control systems with flexible plates.