无线网络控制系统(Wireless Networked Control System,WiNCS)是基于无线网络的分布式控制系统,融合了控制技术、计算机技术、网络技术与通信技术,具有无需布线、节省构建费用、组网和维护方便、易于扩展以及良好的可移动性等优点。目前,无线网络控制系统的分析和设计已经成为控制界的热点研究之一。针对无线网络控制系统的仿真技术进行了研究,基于网络控制仿真软件TrueTime以及Matlab/Simulink环境,设计了一个WiNCS仿真系统模型,提出了在无线网络控制系统中Fuzzy-PD控制算法的设计,并对PD控制、模糊控制和Fuzzy-PD控制三种控制器的控制性能进行了比较。
An H∞ filter design for linear time delay system with randomly varying sensor delay is investigated.The delay considered here is assumed to satisfy a certain stochastic characteristic.A stochastic variable satisfying Bernoulli random binary distribution is introduced and a new system model is established by employing the measurements with random delay.By using the linear matrix inequality(LMI) technique,sufficient conditions are derived for ensuring the mean-square stochastic stability of the filtering error systems and guaranteeing a prescribed H∞ filtering performance.Finally,a numerical example is given to demonstrate the effectiveness of the proposed approach.
