Jerk-Timing-Based Polynomial Trajectory Optimization for Vibration Suppression in Machine Tool Base

Achieving higher feed rates is essential for improving productivity in machine tools. However, high-speed movement causes vibrations in the machine tool base, which decreases productivity. This study proposes a feed drive trajectory generation method that optimizes jerk timing to suppress machine base vibration. In the proposed method, a model of the machine tool is derived, focusing on the machine tool base, and the machine base vibration is analyzed in relation to the jerk timings of the applied trajectories. Experiments on an actual machine tool validate the proposed machine base vibration model, and demonstrate that the optimal trajectory with respect to jerk timing reduces the machine tool base vibration by 15.6% compared with the conventional trajectory used in industrial tools.