Abstract: All possible uncertain delays and their mechanism in closed-loop networked control system(NCS) which includes a remote network are analyzed. Considering real projects’ real-time request, some effective strategies to resolve the network-induced delay problems are put forward which include two main aspects. One is applying time-driven way to poll the field data by estimating and testing the best scanning period, and the other is applying event-driven way to response the uncertain control commands at a priority level. Through the program’s proposal, the uncertain delay is transformed into a controlled delay. This method can make up the NCS’s performance losing caused by the uncertain delay.

Key words: uncertain time delay, real-time disposal, networked control system, package loss

摘要： 分析了包含远程网络在内的闭环网络控制系统所有的可能随机时延，从不同网络层次探讨了其发生的机理。结合实际工程实时处理的需求，从远程监控端的角度提出解决网络诱导随机时延问题的一些有效对策，主要包括两方面：(1)估算、测试最佳扫描周期，采用时间驱动方式轮询现场数据；(2)采用事件驱动方式优先响应随机控制命令。将随机时延经程序处理转化为系统可控的时延，弥补了随机时延可能给控制系统性能带来的损失。

关键词: 随机时延, 实时处理, 网络控制系统, 丢包

CLC Number: 

• TP273