事件驱动网络控制系统的网络流量优化与控制综合协同研究

This project aims to study the co-design of network traffic optimization and controller synthesis for event-trigger mechanism based networked control systems with non-uniformly distributed packet dropouts. Networked control systems have received considerable attention in recent years for the advantages such as low cost in installation and high reliability, etc. However, the time-driven sensors are usually adopted in the literature, which will lead to redundant data filling in the communication channel and will also lead to the waste of the network resources. For networked control systems adopting the event-trigger mechanism, the simultaneous study of the network traffic optimization and controller synthesis is significant. However, this problem has been paid little attention in the existing literature. For the networked control systems considering non-uniformly distributed packet dropouts, by analyzing the corresponding relationship between the number of packet dropouts and the parameter of event-trigger, the controller design method for the event-trigger mechanism based networked control systems will be proposed. To describe the trends of system states, the slope of state vector is adopted firstly, and the adaptive hybrid event-trigger based model is established. Under the condition of guaranteeing the performance of systems, the network traffic is optimized. For the systems with packet dropouts, the event-trigger mechanism based packet dropouts compensation was proposed, and the switch controller design method is proposed. The practical application of networked control systems is promoted by this project.

考虑时延及非均匀分布的丢包，本项目旨在研究基于事件触发机制的网络控制系统的网络流量优化与控制器综合协同设计问题。网络控制系统因其低成本、高可靠性等优点，得到广泛应用。然而，现有网络控制系统通常采用时钟驱动的传感器，导致大量冗余数据发送到网络中，造成网络资源浪费。对于网络控制系统，采用事件触发机制，并开展网络流量优化和控制综合协同研究具有重要意义，而该问题的研究正处于起步阶段。本项目对具有非均匀分布丢包的网络控制系统，分析丢包数量与触发参数对应关系，提出基于多触发参数事件触发机制的网络控制系统控制器设计方法；首次采用状态向量斜率定量地描述系统状态变化趋势，建立基于自适应混合事件触发机制的系统模型，在保证系统性能的前提下优化网络流量；对存在丢包的系统，提出基于事件驱动机制下的丢包补偿策略，根据丢包状态提出切换控制器设计方法。本项目推动了网络控制系统向实际应用的发展。

本项目研究基于事件触发机制的网络控制系统的流量优化与控制器综合协同设计、故障检测问题。网络控制系统因其实现资源共享，低成本、高可靠性，便于安装和维修等优点，得到广泛应用。然而采用时间驱动方式的网络控制系统将大量冗余数据发送到通信信道，造成网络资源负载过大，从而对系统性能造成负面影响。本项目考虑控制输入到达时刻的非均匀分布特性，提出了基于观测器的网络控制系统控制器设计准则；提出基于全阶故障检测滤波器及基于观测器的故障检测方案；提出了具有非均匀分布丢包补偿的基于事件触发机制的网络控制系统控制器设计准则；利用系统状态向量斜率定量描述系统状态变化趋势，研究了基于自适应混合事件触发机制网络控制系统性能优化问题。该项目研究是网络控制理论与工业应用相结合的有益探索。