基于离散事件触发通信机制的非均匀传输网络化控制系统故障调节与通信满意协同设计

摘要

基于离散事件触发通信机制(DETCS),考虑执行器饱和约束,研究了网络化控制系统(NCS)同时满足多项约束目标的主动容错与网络通信间的协同设计问题.首先,通过在传统的NCS中引入事件发生器,提出并构建了DETCS下NCS主动容错的架构与设计理念,即基于系统中物理采样器采样周期的驱动来设计状态和故障观测器,基于网络通信约束触发的事件驱动来设计反馈控制.其次,建立了集网络属性、执行器饱和约束、故障估计、扰动信息、故障调节与反馈控制为一体的非均匀传输闭环故障系统模型.接着,给出了满足H∞性能的状态和时变故障估计的广义观测器的求解方法,并以此为基础给出了非均匀传输故障调节与网络通信间的满意协同设计方法.最后,通过采用四容水箱基准实例验证了理论结果的正确性与实用性.%Based on the Discrete Event-triggered Communication Scheme (DETCS) and considering actuator saturation constraint,the co-design problem was studied for Network Control System (NCS).Such co-design was between active fault-tolerant control with multi-objective constraints and network communication.First,the NCS active fault-tolerant framework and design concept were proposed by introducing event-trigger to the traditional NCS,namely,the observer of state and fault was driven by equal physical sampling period of the system,and the feedback control was driven by event with communication constraints.Second,the model of non-uniform transmission closed-loop failure system was established dedicatedly,which integrated network attribute,actuator saturation constraint,estimation value of failure,and disturbance information into one uniform framework.Third,the solving method of state and fault estimation with H∞-performance was proposed based on generated observer.The co-design method between satisfactory failure accommodation and network communication was given for non-uniform transmission NCS.Finally,simulation experiment was conducted to verify the effectiveness and feasibility of the proposed method by a four tank benchmark example.