基于实时性优化的CAN总线织机分布式控制系统

为了适应高速织机对电气控制系统通讯实时性的要求,提出了基于CAN总线的织机分布式控制系统。通过分析CAN总线的特性以及与RS-485总线的比较,说明织机采用CAN总线具有优越性和可行性;同时针对影响CAN总线通讯实时性的因素,分别分析了CAN协议本身固有缺陷和应用层协议CANOpen在通讯实时性方面的不足,提出CAN网络实时性优化方法,并给出了实时CANOpen协议的实现过程,及织机分布式控制系统结构。系统运行结果表明,控制系统通讯出错率低,运行稳定,具有一定的应用价值。

Distributed control system of loom based on real-time performance optimized CAN-bus

To meet the real-time performance requirement of high speed loom′s control system,a loom distributed control system based on CAN-bus was presented.Through analyzing CAN-bus′s character and comparing with RS-485 bus,it confirmed the feasibility and superiority of application of the CAN bus on loom;In allusion to the communication real-time performance,it analyzed the inherent limitation of CAN protocol and the deficiencies in application layer protocol CANOpen,a network real-time optimized method was proposed,and the realizing process of protocol CANOpen and the architecture of rapier loom distributed control system were presented.The results of the control system running indicated that it had a low error rate of connunication and worked steadily.The system has some application value.