针对常用的Stribeck摩擦指数模型,提出用泰勒高次展开的方法达到非线性摩擦模型的线性化,利用最小二乘拟合的方法得到摩擦模型参数.通过对数控机床控制系统的电动机电流和转速等信号的采集,得到了进给系统中摩擦力矩与转速的对应关系,利用提出的方法进行了辨识实验,实验结果表明,该方法能对Stribeck摩擦模型的参数进行精确的辨识.该方法在工程实际中具有应用价值.%This paper proposed an identification method that non-linear friction model described as Stribeek are linearized by using high order Taylor series expansion and parameters of the model are obtained by using method of least square ( LSM). Signals of servo motor current and rotating rate which are offered in any modern CNC machine tools are needed for the identification and experiments results shows that parameters of Stribeck can be obtained accurately by the identification method. The method is suited for industrial condition and has its practicality.
展开▼
