双驱进给系统同步误差建模与分析
Modeling and Analysis of Synchronization Error of Double-drive Feed System

以数控铣床工作台进给系统为研究对象，通过分析双丝杠进给结构机械特性，并考虑工作台所受摩擦力，建立了同步误差理论模型。利用MATLAB/Simulink模块求解，分析结构参数等因素对同步误差的影响趋势。通过实验测得工作台分别在匀速运动和S形曲线运动下的同步误差，并与理论计算相比较。结果表明：进给系统同步误差是由几何误差导致的扭转角和运动过程中工作台两侧结构参数的不同共同作用产生的，所建的模型对同步误差有较准确的预测。
According to the feed system of a CNC machine center, based on the analysis of mechanical properties of a double-drive ball screw feed system, with the friction of its worktable considered, the theoretical model of synchronization error is developed and solved by MATLAB/Simulink. The impact of structural parameters and other factors on the synchronization error is analyzed. The synchronization error of the worktable under uniform motion and S-shaped curve motion is measured with experiments and compared with the results of the theoretical model. The results show that the synchronization error of the feed system is caused by the twist angle due to the geometric error and different structural parameters of the two sides of the worktable during movement. The model can predict well the synchronization error