CAJ | 학술논문

为满足开放式数控系统的发展要求，开发了一种基于实时以太网Ethernet for Manufacture Automation Control （EtherMAC）开放式运动控制系统。EtherMAC主节点基于标准工业计算机，无需专用网卡和硬实时操作系统，从节点基于可编程逻辑门阵列（field programmable gate array，FPGA）硬件逻辑，不依赖专用芯片，从而在硬件结构上保证了系统的开放性。EtherMAC通过选取网络中第一个从节点管理网络的通讯周期和分布时钟，并利用以太网的巨大带宽将IPC强大运算能力和底层FPGA的硬实时特性高效地结合在一起，使系统主节点在软实时的操作系统支持下即可获得严格实时的通讯周期控制。实验结果表明，EtherMAC 可以在Windows CE系统上获得小于1 ms的通讯周期，并且其同步精度可以保证在100 ns范围内，满足多轴运动控制系统的实时同步需求。
위만족개방식수공계통적발전요구，개발료일충기우실시이태망Ethernet for Manufacture Automation Control （EtherMAC）개방식운동공제계통。EtherMAC주절점기우표준공업계산궤，무수전용망잡화경실시조작계통，종절점기우가편정라집문진렬（field programmable gate array，FPGA）경건라집，불의뢰전용심편，종이재경건결구상보증료계통적개방성。EtherMAC통과선취망락중제일개종절점관리망락적통신주기화분포시종，병이용이태망적거대대관장IPC강대운산능력화저층FPGA적경실시특성고효지결합재일기，사계통주절점재연실시적조작계통지지하즉가획득엄격실시적통신주기공제。실험결과표명，EtherMAC 가이재Windows CE계통상획득소우1 ms적통신주기，병차기동보정도가이보증재100 ns범위내，만족다축운동공제계통적실시동보수구。
A real-time Ethernet named EtherMAC (Ethernet for Manufacture Automation Control)was developped for open computer numerical control system.A standard industrial personal computer (IPC)based master node and field programmable gate array (FPGA)based slave nodes were employed in EtherMAC,as neither dedicated network inter-face card (NIC)nor application specific integrated circuit (ASIC)chips were mandatory,the system was open in hard-ware architecture.The computation ability of IPC and hard real-time property of FPGA were combined together with Ethernet in this way.By adopting the first slave node to manage the communication and distributed clock,time critical performance could be achieved even the master node only with soft real-time performance.Experimental results showed that communication period less than 1 ms and synchronization precision within 100 ns could be achieved by EtherMAC, which were enough for motion control systems demanded critical real-time and synchronization.