Study on the influence of load inertia ratio on speed planning strategy of feed drive system

The speed planning of the feed system is an important factor affecting the machining accuracy and efficiency of high-speed and high-precision machine tools. Existing research on speed planning for CNC machine tools primarily focuses on reducing speed fluctuations and avoiding sudden changes in acceleration and jerk to improve machining accuracy and surface quality. They do not explicitly consider the comprehensive action of each subsystem. The load inertia ratio is one of the key parameters to study the comprehensive effect of subsystems. This paper fills this gap by elucidating the evolution of feed system performance under the combined effects of load inertia ratio and speed planning, starting from the dynamic fundamental mechanisms. By eliminating the influence of servo control, the influence of speed planning on the dynamic performance of the feed system under different load inertia ratios is studied. To further improve the dynamic performance of the feed system, the speed planning strategy should be adjusted according to the load inertia ratio. This paper provides a theoretical basis for speed planning considering the influence of the load inertia ratio.