In this paper,a novel control structure called feedback scheduling of model-based networked control systems is proposed to cope with a flexible network load and resource constraints.The state update time is adjusted a...In this paper,a novel control structure called feedback scheduling of model-based networked control systems is proposed to cope with a flexible network load and resource constraints.The state update time is adjusted according to the real-time network congestion situation.State observer is used under the situation where the state of the controlled plant could not be acquired.The stability criterion of the proposed structure is proved with time-varying state update time.On the basis of the stability of the novel system structure,the compromise between the control performance and the network utilization is realized by using feedback scheduler. Examples are provided to show the advantage of the proposed control structure.展开更多
在网络控制系统中,网络负载的加重会使网络资源变得有限,从而使各个子系统的控制性能变差.为了改善这一情况下系统的控制品质(quality of control,QoC),本文提出了流动式死区反馈调度方法.通过对死区节点的动态选择和对死区范围的连续分...在网络控制系统中,网络负载的加重会使网络资源变得有限,从而使各个子系统的控制性能变差.为了改善这一情况下系统的控制品质(quality of control,QoC),本文提出了流动式死区反馈调度方法.通过对死区节点的动态选择和对死区范围的连续分配,整个系统在网络资源有限的情况下总的控制品质得到了提高.仿真结果表明,在网络资源紧缺时,该方法采用的流动式死区思想和死区范围连续化思想对系统QoC的提高是有效的.展开更多
针对网络控制系统(Network Control Systems,NCS)节点中的非周期任务,设计了一种FC-ABS调度算法.该调度算法可以根据非周期任务的时间特性采取不同的调度方式,并通过反馈调度减小非周期任务调度对周期任务的影响.仿真实验证明了算法的...针对网络控制系统(Network Control Systems,NCS)节点中的非周期任务,设计了一种FC-ABS调度算法.该调度算法可以根据非周期任务的时间特性采取不同的调度方式,并通过反馈调度减小非周期任务调度对周期任务的影响.仿真实验证明了算法的正确性.展开更多
文摘In this paper,a novel control structure called feedback scheduling of model-based networked control systems is proposed to cope with a flexible network load and resource constraints.The state update time is adjusted according to the real-time network congestion situation.State observer is used under the situation where the state of the controlled plant could not be acquired.The stability criterion of the proposed structure is proved with time-varying state update time.On the basis of the stability of the novel system structure,the compromise between the control performance and the network utilization is realized by using feedback scheduler. Examples are provided to show the advantage of the proposed control structure.
文摘在网络控制系统中,网络负载的加重会使网络资源变得有限,从而使各个子系统的控制性能变差.为了改善这一情况下系统的控制品质(quality of control,QoC),本文提出了流动式死区反馈调度方法.通过对死区节点的动态选择和对死区范围的连续分配,整个系统在网络资源有限的情况下总的控制品质得到了提高.仿真结果表明,在网络资源紧缺时,该方法采用的流动式死区思想和死区范围连续化思想对系统QoC的提高是有效的.
