一、引言机床,特别是大型机床,其工作台的直线运动曲线不是一成不变的。由于机床热变形,静压导轨的油温和油压的变化,载荷分布不均匀等缘故,运动曲线也会相应地发生变化。为了有效地对其运动误差进行补偿,以提高工件的加工精度,必须对工作台的运动误差进行在线 First, the introduction of machine tools, especially large machine tools, the linear motion of the table is not static curve. Due to thermal deformation of the machine tool, static pressure guide the oil temperature and oil pressure changes, uneven load distribution and other reasons, the movement curve will be changed accordingly. In order to effectively compensate for its motion error, in order to improve the machining accuracy of the workpiece, the motion error of the table must be online