网络控制系统的通信机制分析与应用

Analysis and application of NCS communication mechanism

对基于通信网络的控制系统展开研究,提出网络控制系统NCS(NetworkedControlSystem)的概念,描述其结构特点及功能分配,指出它是控制与信息的和谐统一。对NCS的通信机制进行重点研究,分析了信息的流动过程,时延的产生及构成。对由于通信网络的参与引起的控制系统性能的变化进行了讨论。结合水力发电机组状态监测的实际,提出了一种具有LonWorks+交换式以太网结构的NCS,并对其进行了阐述。

Communication network based control system is researched,and the concept of NCS （Networked Control System） is presented. Its framework characteristics and function allocation are described,and it is a harmonious entity of control and information. The communication mechanism of NCS is emphatically researched. The information flowing procedure in NCS is analyzed,as well as the generation and components of network-induced time delay. The performance changes control system caused by the insertion of communication network are discussed. Combined with of the facts of state monitoring of hydroelectric generator,a NCS with LonWorks plus switched Ethernet is presented,and its functions are discussed in detail.