点对点和集总帧通信下网络化CNC系统的位置同步控制

为了提高网络化数控系统协同运动的同步控制性能,提出了一种将点对点通信模式和集总帧通信模式结合应用在环形网络的周期通信规划,以使主节点能及时获取所有轴的反馈信息。提出了相应的位置同步算法和运动消息预估算法,并对根据算法设计的位置同步控制器进行了稳定性证明。实验表明,该通信规划相应的位置同步控制器具有良好的同步性能。

Position Synchronization Control Based on Point-to-point and Lumped-frame Communication in Networked CNC System Lumped-frame Communication in Networked CNC System

To improve the performance of synchronization control of coordinated motion in the networked computer numerical control (CNC) system, a periodic communication plan which combined the point-to-point communication with the lumped-frame communication in the ring network was proposed to make the master to access the feedback messages of all axes timely. The corresponding position synchronization algorithm and motion message estimating algorithm were proposed. Meanwhile, the stability proof of the position synchronization controller designed according to the algorithms was conducted. Finally, experiment results showed that the root mean square errors (RMSE) of the position synchronization controller corresponding to the communication plan were reduced by 49.270% than those of the standard proportional-derivative (PD) controller. The results indicate that the position synchronization controller corresponding to the communication plan has good synchronization performance, which has positive meaning to further improve the performance of synchronization control in networked CNC system.