容错分布控制系统设计

Fault-tolerant Design of Distributed Discrete Control System

研究设计了一种容错离散分布控制系统的网络配置结构,即将控制系统中的每个可编程控制器作为一个控制结点,结点之间通过网络进行连接构成离散分布控制系统;使系统实现容错的方法是,增加一个在Galois域进行运算的冗余控制器结点,从而使系统能够自动侦查系统中的结点(可编程控制器)是否正常工作,并能使不正常工作的结点的功能得到恢复,确保系统的容错性和可靠性;实验证明这种设计是有效可行的;容错分布控制系统具有良好的抗故障能力,有很好的实际应用价值。

A fault tolerant configuration for a multiple discrete control system is provided, in which every distributed control node, such as programmable logic controllers, communicates viar networks, The design methodology of an additional redundant controller using Galois field and an error-detectlng code is proposed, The proposed method is implemented and tested on distributed controllers connected on a network, It is shown that the system is functional even if one of the Controllers fails. The fault- tolerant control system will be of great value for industrial application.