High Speed CNC System Design. Part II : Modeling and Identification of Feed Drives
High Speed CNC System Design. Part II : Modeling and Identification of Feed Drives
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DOI：
10.1016/s0890-6955(01)00003-7
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发表时间：
2001-08
影响因子：
14
通讯作者：
K. Erkorkmaz;Y. Altintas
中科院分区：
文献类型：
--
作者：
K. Erkorkmaz;Y. Altintas
进给系统动力学的精确建模和辨识是设计高性能数控系统的重要环节。本文提出了一种识别机床传动动态参数和摩擦特性的方法。通过无偏最小二乘法估计惯性和粘性摩擦。摩擦模型是通过观察通过卡尔曼滤波器的干扰转矩，而在闭环控制下，在不同的速度微动轴。本文第三部分介绍了一个高速进给驱动控制系统的设计。作为对所识别的摩擦模型的验证，还给出了无摩擦补偿和有摩擦补偿的轮廓试验结果。
Accurate modeling and identification of the feed drives' dynamics is an important step in designing a high performance CNC. This paper presents a method for identifying the dynamic parameters, as well as the friction characteristics of machine tool drives. The inertia and viscous friction are estimated through an unbiased least squares scheme. The friction model is developed by observing the disturbance torque through a Kalman filter, while jogging the axes under closed loop control at various speeds. The overall axis model is used in designing a high speed feed drive control system, which has been presented in Part III of this paper. As verification of the identified friction model, contouring test results without and with friction compensation are also presented.